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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)
79Degrees
High Temperature
0%
Probability of Precipitation - Daytime
57Degrees
Low Temperature
0%
Probability of Precipitation - Nighttime
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Today in Peterborough, NH at a Glance
Today in Nashua, NH at a Glance
Your Daily Forecast - Three Days at a Time
No Active Advisories
None
Monday/Monday Night - September 21
Nashua - East
Peterborough - Central/West
Tuesday/Tuesday Night - September 22
Nashua - East
Peterborough - Central/West
Wednesday/Wednesday Night - September 16
Nashua - East
Increasing clouds, with a low around 61. Southwest wind around 5 mph becoming calm.
Peterborough - Central/West
Partly cloudy, with a low around 59. Calm wind.
Thursday/Thursday Night - September 17
Nashua - East
Mostly cloudy, with a high near 81. Calm wind becoming east around 5 mph.
A chance of showers and thunderstorms. Cloudy, then gradually becoming partly cloudy, with a low around 62. Calm wind. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Peterborough - Central/West
A 30 percent chance of showers, mainly after 4pm. Mostly cloudy, with a high near 76. Calm wind becoming southeast around 5 mph. New precipitation amounts of less than a tenth of an inch possible.
Showers and thunderstorms likely before 2am, then a slight chance of showers between 2am and 3am. Mostly cloudy, with a low around 60. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday/Friday Night - September 18
Nashua - East
Sunny, with a high near 76. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Partly cloudy, with a low around 47. Northwest wind around 5 mph becoming calm in the evening.
Peterborough - Central/West
Sunny, with a high near 71. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Partly cloudy, with a low around 43. Northwest wind around 5 mph becoming calm in the evening.
Saturday/Saturday Night - September 19
Nashua - East
Peterborough - Central/West
Sunday/Sunday Night - September 20
Nashua - East
Peterborough - Central/West
Current Weather Readings in Peterborough, NH
Time of the readings below: 16 Sep 2026 11:59 PM
(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:
63.7°F (-0.4)
High Temperature:
79.7 at 3:03 PM
Low Temperature:
52.5 at 1:02 AM
Precipitation Today:
0.00 inches
Current Dewpoint:
61.6°F (-0.4)
Highest Heat Index Reading:
79.7 at 3:03 PM
Current Windspeed:
0 MPH (0)
Barometric Trend:
Steady
Hours of Daylight Today:
12:25
Link to my Active Weather Instruments
Information for New England
Seven Day Temperature Outlook - Manchester NH & Southern New England
Current Northeast Radar
Expected Temperature Range
Health/Sports - The Five Day Allergy & NFL Football Weather by Game
Rich's Weather Discussion
New Hampshire/North Briefing
Massachusetts/South Briefing
At this moment: 9/16 - 4:56 PM
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:
Back on the regular schedule- Site is completely updated.
Increasing clouds tonight into Thursday with a small chance of showers developing during the late afternoon on Thursday. Best chance for any shower activity is Thursday night, but then sunny weather returns for Friday. It will be cooler and less humid Friday.
At the moment, Saturday looks sunny & dry, with showers moving in by Saturday night. Sunday looks unsettled but the long range models do not agree at the moment. Stay tuned.
A wet period will move into southern New Hampshire and southern Maine Thursday afternoon and evening, followed by a much cooler and windy day Friday. Friday and Saturday will be mostly dry with plenty of sunshine, although Friday will feature northwest wind gusts of 30 to 35 mph. Another chance for rain arrives Sunday, with the best chances across southern New Hampshire and southwest Maine. Temperatures will remain below normal through much of next week, with highs mainly in the 60s.
After nearly two weeks of an empty map, the National Hurricane Center has circled an area about 1,000 miles southeast of Bermuda that could end up developing, if it manages to survive the strong wind shear that has been keeping the basin so quiet so far this year.
Zoom out: While last week marked what is usually the peak of the Atlantic hurricane season, there's a chance that we may not see a single hurricane in the Atlantic this month. If that happens, it would be only the third time since World War II for the Atlantic hurricane season to go zero for September, and the first time in over three decades (since 1994). That's just how powerful the current El Nino is.
Sea surface temperatures are record hot, but this El Nino is leading to the kind of wind shear we usually see in December, when Atlantic hurricanes are incredibly infrequent: There's plenty of fuel for hurricanes to feed on, but the wind is preventing any momentum from getting started in the first place. While everyone who lives in traditionally hurricane-prone areas is certainly enjoying the lack of drama this year, just because we're past the peak of hurricane season doesn't mean that we won't see any more storms. As fall fronts move in, we'll have to be alert to the possibility of other systems popping up in the subtropics around Florida and the Gulf.
The water there remains incredibly warm, so keep those weather alerts on, and we'll do our part to let you know when to keep a close eye on the weather.
I have added NFL Football Weather for each game- Updated weekly/daily as needed - Find the list here
The Drought Maps have been updated.
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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 1920, a horse-drawn cart pulled up across from the J.P. Morgan building in the heart of Wall Street and then exploded, killing more than 30 people and injuring hundreds. The Wall Street bombing remains unsolved to this day.
Latest site updates and additions:
09/13 - NFL Football weather for all games can be found here: NFL Weather
08/17 - See the First look at Autumn Maps and info here
Find the September Almanac Here
Hurricane Season began on June 1st - Details and forecasts can be found here.
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: 09/14/2026 - Next Update: 09/30 (or thereabouts)
Weather Summaries and Full Area Forecast Discussions - North (Edited)
Summary - Northern New England - New Hampshire and Maine
Summary:
A wet period will move into southern New Hampshire and southern Maine Thursday afternoon and evening, followed by a much cooler and windy day Friday. Friday and Saturday will be mostly dry with plenty of sunshine, although Friday will feature northwest wind gusts of 30 to 35 mph. Another chance for rain arrives Sunday, with the best chances across southern New Hampshire and southwest Maine. Temperatures will remain below normal through much of next week, with highs mainly in the 60s.
Key Messages:
- A disturbance will bring a period of rain and showers through southern New Hampshire into southern Maine Thursday afternoon and evening.
- Expect dry and breezy conditions Friday with cooler temperatures. Fair weather will prevail through most of the weekend, although chances for rain showers increase again Sunday, especially across southern New Hampshire and southwest Maine.
What has changed since the last Forecast Update?
A minor increase in expected rainfall amounts for Thursday evening, along with an increase in expected wind gusts for Friday.
What this means for you:
Plan for rain and showers Thursday afternoon and evening, especially across southern New Hampshire and southern Maine. Friday will feel noticeably cooler and windy, but most areas should have plenty of sunshine. Saturday looks like the quietest and brightest day of the weekend. Rain chances increase again Sunday, particularly in southern New Hampshire and southwest Maine. Despite the rainfall Thursday and Sunday, flooding is not expected because soils have been relatively dry.
Click the Open/Close Button to Display the Full Edited Area Forecast Discussion
**Area Forecast Discussion, National Weather Service Gray ME**
**310 PM EDT Wednesday,
September 16, 2026**
**What Has Changed**
A minor increase in expected rainfall amounts for Thursday evening, along with an increase in expected wind gusts for Friday.
**Key Messages**
1. A disturbance will bring a period of rain and showers through southern New Hampshire into southern Maine Thursday afternoon and evening.
2. Expect dry and breezy conditions Friday with cooler temperatures and fair weather prevailing through most of the weekend. Chances for rain showers increase again on Sunday, especially across southern New Hampshire and southwest Maine.
**Discussion**
**Thursday Rain**
A cold front will continue to slowly pass through the region, stalling over the coastal waters this evening. A low pressure system developing to the west will track toward the region, pushing the front northward again Thursday as a warm front.
Clouds will increase tonight, with mostly overcast skies expected Thursday morning. The thicker cloud cover should help keep temperatures from falling too much overnight, with lows in the mid 50s to around 60 degrees despite calm winds.
Dry conditions will continue through Thursday morning, but shower chances will increase across western New Hampshire by mid-afternoon. A compact area of low pressure will begin to strengthen as it moves through central New England and southern New Hampshire into southern Maine.
A brief period of deeper moisture throughout the atmosphere will help an area of rain develop and expand as the system approaches coastal Maine. The rain should move through fairly quickly, with only a narrow corridor likely to receive a more beneficial amount of rainfall. Areas outside that corridor will see lighter and more scattered showers.
Because conditions have been relatively dry leading up to this system, there is little to no threat of flooding.
Rain should move out of the coastal communities after midnight and before daybreak Friday, with improving conditions expected during the day Friday.
**Friday Wind and Cooler Temperatures**
An upper-level low will move into the Gulf of Saint Lawrence from Quebec Friday while a surface cold front moves offshore into the Atlantic.
High pressure will begin building in behind the front. This will tighten the pressure gradient, meaning there will be a greater difference in air pressure across the region, which helps strengthen the winds. Colder air will also move into the area, while stronger winds higher in the atmosphere will be able to mix down toward the surface.
These factors point to a fairly windy Friday, with forecast data suggesting northwest wind gusts could reach 30 to 35 mph.
A few isolated showers and lingering clouds may remain over the mountains, but most areas will have dry weather and plenty of sunshine. Winds should decrease fairly quickly Friday evening as daytime heating ends and the pressure gradient begins to relax.
**Saturday**
Saturday will bring lighter winds as the center of high pressure moves into Quebec. This pattern should provide plenty of sunshine along with below-normal temperatures. Highs will mainly be in the low to mid 60s.
**Sunday Rain Chances**
The next disturbance and cold front will begin approaching Sunday, bringing the next chance for rain, with probabilities ranging from 40 to 70 percent.
There is still considerable uncertainty regarding the exact timing and eventual track of this system. However, forecast models have begun to show better agreement that southern New Hampshire and southwest Maine will have the best chances for rain.
Current forecast guidance suggests these areas have a 40 to 50 percent chance of receiving at least one-half inch of rain, while the chances decrease farther north and east.
Most of the rain should move out Sunday night. Dry weather is then expected until another front approaches sometime in the middle to latter part of next week.
Temperatures should remain below normal well into next week, with highs mainly in the 60s.
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Weather Summaries and Full Area Forecast Discussions - South (Edited)
Summary - Southern New England - Massachusetts/Northern CT/Rhode Island
Summary:
A warmer and more humid day is expected Thursday, with temperatures potentially reaching the low 80s in some river valleys. Scattered showers may develop Thursday evening and continue into Friday morning, but most of southern New England should see only light rainfall. Drier and more seasonable weather returns Friday. Rain chances increase again late Saturday night into Monday, although the exact timing, coverage, and rainfall amounts remain uncertain.
Key Messages:
- Increased humidity and warmer temperatures continue Thursday.
- Scattered showers are possible Thursday evening into Friday morning, followed by dry weather during the day Friday.
- Rain chances return during the second half of the weekend. There remains uncertainty regarding coverage, timing, and rainfall amounts.
What has changed since the last Forecast Update?
No significant changes to the forecast.
What this means for you
Thursday will feel noticeably more humid and warmer than the past few days, with some patchy fog possible tonight, especially in the Connecticut Valley. Most of Thursday should remain dry, but scattered showers may arrive Thursday evening and continue into Friday morning. Friday should turn drier with clearing skies. Another round of rain is possible from late Saturday night into Monday, but the details are still being worked out.
Click the Open/Close Button to Display the Full Edited Area Forecast Discussion
**Area Forecast Discussion, National Weather Service Boston/Norton MA, 306 PM EDT Wednesday, September 16, 2026**
**What has Changed**
No significant changes to the forecast.
**Key Messages**
Increased humidity and warmer temperatures continue Thursday.
Scattered showers are possible Thursday evening into Friday morning, followed by dry weather during the day Friday.
Rain chances return during the second half of the weekend. There remains uncertainty regarding coverage, timing, and rainfall amounts.
**Discussion**
**Key Message 1, Increased humidity and warmer temperatures continue Thursday**
Warmer temperatures and increased humidity will continue into Thursday as an unusually moist air mass and warmer temperatures several thousand feet above the ground move into southern New England on southwest winds.
Looking ahead to tonight, the added moisture combined with lighter winds inland may allow some patchy fog to develop, especially in the Connecticut Valley.
Temperatures about 3,000 feet above the ground are expected to reach the equivalent of about 61 to 66 degrees Thursday afternoon. This could support high temperatures in the low 80s, especially in the river valleys.
The warmer air will remain in place Thursday night as high pressure stays just south of the region and maintains southwest winds. Overnight lows will likely remain in the 60s, rather than dropping into the 50s and 40s as they have on some recent nights.
Precipitable water, which measures the total amount of moisture available in the atmosphere, could reach up to 2.0 inches. Dewpoints in the upper 60s will also make it feel noticeably more humid. Despite the increase in humidity, much of the region should remain dry Thursday.
**Key Message 2, Scattered showers possible Thursday evening into Friday morning, dry Friday**
A weak shortwave trough, an area of lower pressure and rising motion in the upper atmosphere, will move eastward behind the plume of moisture and help produce scattered showers across southern New England.
As mentioned above, the latest guidance shows precipitable water values reaching and possibly exceeding 2.0 inches Thursday afternoon and evening. However, widespread heavy downpours are not expected because the strongest atmospheric forcing is forecast to remain across northern New England.
Global weather models and many CAMs, or convection-allowing models that provide higher-resolution forecasts for individual showers and thunderstorms, generally agree that the higher rainfall totals should remain to our north. Ensemble forecasts, which use many slightly different model forecasts to assess uncertainty, also support this outcome.
Rainfall across southern New England should generally range from 0.1 to 0.3 inches, based on the expected northern track of the weather system. Some instability, meaning an environment that could support stronger showers, may remain Thursday night. As a result, an isolated heavier downpour cannot be completely ruled out.
Rainfall totals could increase somewhat if the system tracks farther south than currently expected. Overall, though, the general forecast consensus is for the strongest forcing to remain north of the region, with most areas receiving only a few tenths of an inch.
Following this system, drier air will move back into the region with northwest winds. This should help clear the skies Friday and bring temperatures back toward more seasonable levels.
**Key Message 3, Rain chances return late Saturday night into Monday morning**
High pressure is expected to move across northern New England Saturday and then over the North Atlantic Sunday. This should clear the way for an area of low pressure to move from the lower Great Lakes south of New England sometime from late Saturday night into Monday.
This will likely bring the next period of rainfall to the region. However, the timing is not yet finalized, particularly because of the high pressure system over the ocean. A slower progression of the system is possible.
There is also uncertainty about how much rain the region could receive. High pressure over eastern Canada may push far enough south to force the eventual storm track farther south as well. If that happens, the region could remain relatively dry Tuesday into Wednesday.
If the current scenario develops, total rainfall could generally be limited to about 1 to 2 inches by Monday afternoon. However, if a nearly stationary front remains close to the south coast of New England, it could produce additional showers extending into the middle of next week.
Countdown to Autumn
Autumn Begins on: September 23, 2026 at 2:05 AM EDT
92Days18Hours28Mins13Secs
Five Day Daily Temperature Run - Peterborough, NH
Updated Every Morning
Normal Daily Averages
High Temperature: 69 Degrees - Low Temperature: 47 Degrees
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Weather News/Headlines of Interest -
Updated Daily
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2026 Atlantic hurricane season: 2 areas could boost tropical activity
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