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Last Complete Site Update: 9/04 - 7:18 AM

Weather for New England and the Northeast

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Delivering Weather Forecasts for New England for 27+ years.
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"By all these lovely tokens, September days are here.
With summer's best of weather and autumn's best of cheer."
- Helen Hunt Jackson

Today’s Weather at a Glance

Updated Every Morning and as Needed Through the Day

(Averages Across Southern NH)
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High Temperature
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Probability of Precipitation - Daytime
57Degrees
Low Temperature
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Probability of Precipitation - Nighttime
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Today in Peterborough, NH at a Glance

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Today in Nashua, NH at a Glance

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Your Daily Forecast - Three Days at a Time

No Active Advisories

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Monday/Monday Night - September 7

Nashua - East

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Sunny, with a high near 78.

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Partly cloudy, with a low around 55.

Peterborough - Central/West

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Get your forecast from RichLefko Lite
Sunny, with a high near 74.

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Partly cloudy, with a low around 51.

Tuesday/Tuesday Night - September 8

Nashua - East

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Get your Forecast from RichLefko Lite
Mostly sunny, with a high near 77.

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Partly cloudy, with a low around 51.

Peterborough - Central/West

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Mostly sunny, with a high near 72.

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Partly cloudy, with a low around 48.

Wednesday/Wednesday Night - September 9

Nashua - East

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Get your forecast from RichLefko Lite
Partly sunny, with a high near 74.

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A 50 percent chance of showers. Mostly cloudy, with a low around 58.

Peterborough - Central/West

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Partly sunny, with a high near 70.

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A 50 percent chance of showers. Mostly cloudy, with a low around 55.

Thursday/Thursday Night - September 10

Nashua - East

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Get your forecast from RichLefko Lite
Partly sunny, with a high near 80.

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Peterborough - Central/West

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A 30 percent chance of showers. Partly sunny, with a high near 75.

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Friday/Friday Night - September 4

Nashua - East

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Mostly sunny, with a high near 83. Light and variable wind becoming northwest 5 to 10 mph in the afternoon.

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Partly cloudy, with a low around 59. Northwest wind around 5 mph.


Peterborough - Central/West

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Areas of fog before 9am. Otherwise, mostly sunny, with a high near 78. Light and variable wind becoming northwest 5 to 10 mph in the morning.

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Mostly cloudy, then gradually becoming clear, with a low around 55. Northwest wind around 5 mph becoming calm.

Saturday/Saturday Night - September 5

Nashua - East

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A chance of showers and thunderstorms between 2pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Increasing clouds, with a high near 77. North wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

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Showers likely, mainly before 10pm. Mostly cloudy, with a low around 53. Calm wind. Chance of precipitation is 60%.

Peterborough - Central/West

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A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 73. North wind around 5 mph.

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Showers likely, mainly before 7pm. Mostly cloudy, with a low around 49. Calm wind. Chance of precipitation is 60%.

Sunday/Sunday Night - September 6

Nashua - East

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Mostly sunny, with a high near 73. North wind around 5 mph.

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Mostly clear, with a low around 51.

Peterborough - Central/West

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Mostly sunny, with a high near 69. Calm wind becoming north around 5 mph in the afternoon.

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Mostly clear, with a low around 48.

Current Weather Readings in Peterborough, NH

Time of the readings below: 4 Sep 2026 10:39 AM

(FYI: The number in parentheses is the change in the last hour)
(Note: My weather Instruments are Offline from Midnight Wednesday to 7AM Thursday for system Back ups.)

Current Temperature: 

71.9°F (5.9)

High Temperature:

71.9 at 10:38 AM

Low Temperature:

57.5 at 6:45 AM

Precipitation Today:

0.00 inches

Current Dewpoint:

65.4°F (0.3)

Highest Heat Index Reading:

71.9 at 10:38 AM

Current Windspeed:

1 MPH (1)

Barometric Trend:

Steady

Hours of Daylight Today:

12:59

Link to my Active Weather Instruments

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Information for New England

Rich's Weather Discussion

New Hampshire/North Briefing

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Massachusetts/South Briefing

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At this moment: 9/04 - 7:19 AM

Notes from Rich:
What is the 'Regular’ Schedule.
Weekdays: Morning updates each day before 8AM, Evening Updates before 7PM.
On Weekends: Perhaps a bit later. I like to sleep in.
Every Thursday morning I post the daily forecast through the weekend.

Upcoming Site Update Schedule Changes: 

I will be taking some time off starting this weekend. This site will NOT be updated after 9/5, but will be returning to the regular update schedule around 9/12-13. My weather instrument readings will continue to be live and available through this period.
In the meantime, you can grab a daily forecast, and the forecast for most of the week ahead here at RichLefko.com/Lite. Give it a shot. I created this site so I could keep you all updated weather-wise when I am on vacation. I also posted the weather into next Wednesday in the dailies above!

We have some dense fog in many areas this morning. Be careful if you are out on the roads early. The fog should burn off and we will have a pleasant Friday. Chance of showers arrives by Saturday afternoon. Then much cooler and dry through Labor day and the first half of next week.

A warmer and somewhat sunnier Friday is ahead after areas of dense morning fog, although scattered afternoon showers remain possible. The weekend turns cooler and more unsettled as a backdoor cold front brings additional showers Saturday into Saturday night, with a few showers possibly lingering into Sunday morning. Labor Day Monday looks mainly dry and tranquil before warmer, more unsettled weather may return during the middle of next week.

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What information can you find on my site, and where is it?
The History Section has a lot of history to share, and I will be sharing video on this page from time to time. Updated every day with new weather history.
Find beach and hiking, and Ski information as well as travel info for the USA in the Travel and Leisure Section.
Find all Tropical Tracking/Hurricane information on the Tropics Page.
Find the current Drought Maps here. Now showing a map for each New England State.
Looking for Radar? Try the Radar Page.
Looking for Weather News from Across the globe, plus more local weather info? Look here.
Note: When you move your cursor over an image, the image fades. Click on the image and that opens a lightbox view that expands the image and allows you to click through all of the images in a section.
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On this day in history:
On this day in 1886, Apache leader Geronimo surrendered to U.S. troops in Arizona, closing the book on nearly 30 years of armed conflict between his band and U.S. forces. He was the last Native American leader to formally surrender to the U.S. military, and his surrender is widely considered the end of the Indian Wars in the Southwest.

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Latest site updates and additions:

08/17 - See the First look at Autumn Maps and info here
Find the August Almanac Here
Hurricane Season began on June 1st - Details and forecasts can be found here.
07/17 - Find the Mosquito Outlook in the Heath Section. Added Mosquito forecast for Nashua
05/01 - The Hampton Beach Report returns! Updated daily.
In the Health Section above, starting April 7, you will find the Allergy Forecasts for Southern NH.
You can find my weather Reading via Weather Underground here: Peterborough, NH Readings
Catch Weather News Headlines and links here.
I have updated Rain/Snowfall totals here.
Drought information updates every Other Thursday evening. Last update: 08/30 - Next Update: 09/15 (or thereabouts)
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Weather Summaries and Full Area Forecast Discussions - North (Edited)

Summary - Northern New England - New Hampshire and Maine

Summary:
A warmer and somewhat sunnier Friday is ahead after areas of dense morning fog, although scattered afternoon showers remain possible. The weekend turns cooler and more unsettled as a backdoor cold front brings additional showers Saturday into Saturday night, with a few showers possibly lingering into Sunday morning. Labor Day Monday looks mainly dry and tranquil before warmer, more unsettled weather may return during the middle of next week.

Key Messages:

 - Sunnier weather today after areas of potentially dense fog early this morning, but scattered showers remain possible, mainly this afternoon. Warmer.
 - A backdoor cold front will allow for a few showers Saturday into Saturday night, potentially continuing into Sunday morning. Otherwise, dry weather on Monday could be followed by more unsettled weather later on next week.

What has changed since the last Forecast Update?
A Special Weather Statement has been issued through 13Z, or 9 AM EDT, to highlight areas of fog that have developed, with visibility locally reduced to 1/4 mile.

What this means for you:
Friday morning fog could make for a slower commute, especially where visibility drops to around 1/4 mile. The fog should improve by around 9 AM in most areas, although it may linger near the immediate coast and in deeper valleys. Friday afternoon brings a chance of scattered showers, but there should be more sunshine and warmer temperatures overall. Saturday into Saturday night looks cooler with additional showers and possibly a few thunderstorms. Sunday should gradually improve, with Monday looking dry and comfortable for most of the area.

Click the Open/Close Button to Display the Full Edited Area Forecast Discussion

**Area Forecast Discussion, National Weather Service Gray ME, 614 AM EDT
Fri Sep 4 2026**

**WHAT HAS CHANGED**


A Special Weather Statement has been issued through 13Z, or 9 AM EDT, to highlight areas of fog that have developed, with visibility locally reduced to 1/4 mile. The aviation section was also adjusted for the 12Z, or 8 AM EDT, aviation forecasts.

**KEY MESSAGES**

1. Sunnier weather today after areas of potentially dense fog early this morning, but scattered showers remain possible, mainly this afternoon. Warmer.

2. A backdoor cold front will allow for a few showers Saturday into Saturday night, potentially continuing into Sunday morning. Otherwise, dry weather on Monday could be followed by more unsettled weather later on next week.


**DISCUSSION**

**Key Message 1**

Areas of dense fog are possible early this morning and could affect the morning commute. The fog should thin out by around 9 AM in most locations, except perhaps along the immediate coast and in deeper valleys.

Scattered showers are possible this afternoon as cool cyclonic flow aloft continues. This means cooler air and storminess remain present higher in the atmosphere, helping to support some afternoon shower development. A weak surface trough, or an elongated area of lower pressure near the ground, will also help trigger showers.

Temperatures should be warmer today, with fewer clouds, especially during the morning.

**Key Message 2**

A mid-level trough, or an area of lower pressure several thousand feet above the ground, will deepen over the Canadian Maritimes on Saturday. A surface low is expected to stall over Nova Scotia, helping produce some showers that move backward toward the region along a backdoor cold front. A backdoor cold front is a cold front that approaches from the northeast rather than the usual west or northwest direction.

A few rumbles of thunder cannot be ruled out Saturday night. Temperatures Saturday may trend downward during the afternoon along the coastal plain.

By Sunday evening, the surface low over Nova Scotia is expected to shift southeast while high pressure moves into the region. High pressure should bring tranquil, or generally calm and dry, weather to most areas on Monday, Labor Day.

Persistent northerly winds over the weekend will bring cooler temperatures and lower dewpoints through the holiday weekend. Dewpoint is a measure of the amount of moisture in the air, so lower dewpoints will mean a noticeably less humid feel. Highs should generally be in the lower 70s, with some breezier winds from the north.

Unsettled and warmer weather may return toward the middle of next week.

Weather Summaries and Full Area Forecast Discussions - South (Edited)

Summary - Southern New England - Massachusetts/Northern CT/Rhode Island

Summary:
A pleasant and mostly dry holiday weekend is ahead, with the warmest weather today followed by cooler, more autumn-like conditions Sunday. Saturday brings a small chance of an isolated shower, while Labor Day should be quiet and dry. Temperatures then turn milder early next week, with a chance for more unsettled weather by midweek. The biggest concern this weekend will be along the coast, where increasing rip current danger could make ocean conditions hazardous.

Key Messages:

 - Mainly dry and pleasant today and Saturday with a chance for some isolated showers Saturday afternoon.
 - Cooler weather this weekend into early next week gives way to a warming trend and the chance for unsettled weather by midweek.
 - Dangerous conditions at the beach for the holiday weekend, with the rip current risk increasing Sunday and Labor Day.

What has changed since the last Forecast Update?
No significant changes to the forecast.

What this means for you
Today will be the warmest day, with highs in the low to mid 80s, followed by cooler weather Saturday and especially Sunday. Sunday should feel distinctly like autumn, with sunshine and clouds, northerly winds, and low humidity. Beachgoers should use extra caution Sunday and Labor Day because persistent northeast winds, ocean swell, and offshore seas of 4 to 7 feet will increase the risk of dangerous rip currents.

Click the Open/Close Button to Display the Full Edited Area Forecast Discussion

**Area Forecast Discussion, National Weather Service Boston/Norton MA 708 AM EDT Fri Sep 4 2026**

**What has Changed**


No significant changes to the forecast.

**Key Messages**

1. Mainly dry and pleasant today and Saturday with a chance for some isolated showers Saturday afternoon.

2. Cooler weather this weekend into early next week gives way to a warming trend and the chance for unsettled weather by midweek.

3. Dangerous conditions at the beach for the holiday weekend, with the rip current risk increasing Sunday and Labor Day.

**Discussion**

**Key Message 1, Mainly dry and pleasant today and Saturday**


The next couple of days should be drier and mild as winds from the northwest around a closed low pressure system bring a drier air mass into the region. Precipitable water, or PWAT, values, which measure the amount of moisture available in the atmosphere, will fall below 1.00 inch this afternoon and remain relatively low into Saturday.

Despite the overall drier air, a broad cutoff low over the Canadian Maritimes will maintain a small chance of isolated showers today and Saturday. The greatest chance for shower activity will be Saturday as a disturbance, known as a shortwave, moves south from Canada.

Both days will feature some afternoon cumulus clouds as the lower atmosphere becomes more unstable during the daytime.

Today will be the warmest day of the forecast period as a slightly warmer air mass moves into the region. Temperatures around 5,000 feet briefly reach about 59 degrees this afternoon before falling to about 46 degrees Saturday. This supports high temperatures in the low to mid 80s today and low to mid 70s Saturday.

**Key Message 2, Cooler weather followed by a warming trend**

The upper-air pattern from late this weekend into next week will gradually shift from a blocking pattern, which tends to keep weather systems in place, toward a more typical west-to-east flow. This change occurs as the persistent closed low pressure system over Nova Scotia finally moves away from the eastern United States.

Higher pressure aloft will then build as a broad area of high pressure strengthens to the southeast. At the surface, this should produce a generally quiet weather pattern with high pressure remaining fairly persistent across the Northeast.

The next opportunity for unsettled weather comes around midweek as a strong disturbance moves north of the region. Forecast guidance suggests a relatively compact and seasonably strong surface low could develop in response. Details remain uncertain this far in advance, but there is a chance for more unsettled weather around the middle of next week.

Temperatures aloft will be cooler Sunday as the mid-level low remains east of New England. Temperatures around 2,500 to 3,000 feet will be only about 46 to 50 degrees. With daytime mixing, this should support highs in the upper 60s to low 70s.

Sunday should feel very much like autumn, with a mix of sun and clouds, northerly winds, and dew points in the low 50s. While winds will not be overly strong, the combination of cooler temperatures and lower humidity will make for a crisp day.

Sunday night could feature good radiational cooling, meaning the ground loses heat efficiently under clearer skies and lighter winds. How cool temperatures become will depend on how quickly the winds diminish.

Forecast guidance is also showing this cooling trend Saturday night and Sunday night. The latest forecast shows widespread temperatures in the 50s, with some readings in the upper 40s possible in the higher terrain of northern Massachusetts.

Temperatures should rebound early next week as temperatures around 2,500 to 3,000 feet climb to about 57 to 64 degrees. This should support near-seasonable highs in the upper 70s for Labor Day, followed by upper 70s to lower 80s Tuesday into the middle of next week.

Humidity should remain comfortable, with dew points generally in the upper 50s to around 60 degrees. Labor Day itself looks quiet and dry, although there will be a high risk for rip currents along the ocean beaches.

**Key Message 3, Dangerous beach conditions**

Persistent northeast winds, long-period ocean swell, and offshore seas of 4 to 7 feet will continue to support an elevated risk of dangerous rip currents through the holiday weekend. The greatest concern will be Sunday into Labor Day, particularly along east-facing ocean beaches.

Even though the weather itself should be quiet, ocean conditions may still be hazardous. Anyone heading to the beach should check with local beach staff or lifeguards regarding current ocean conditions before entering the water.

Countdown to Autumn

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Autumn Begins on: September 23, 2026 at 2:05 AM EDT

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Five Day Daily Temperature Run - Peterborough, NH
Updated Every Morning

Normal Daily Averages
High Temperature: 72 Degrees - Low Temperature: 50 Degrees

(Tip: Place your cursor over the bar below to see the number)

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