












Mostly sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.

Partly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm.

Mostly sunny, with a high near 83. Calm wind becoming southwest around 5 mph in the afternoon.

Partly cloudy, with a low around 65. Calm wind.

A chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 89. Heat index values as high as 97. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Mostly clear, with a low around 70. Calm wind.

A slight chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

A 30 percent chance of showers before 7pm. Partly cloudy, with a low around 68. Calm wind.

A 30 percent chance of showers after 3pm. Mostly sunny and hot, with a high near 92. Calm wind becoming west around 5 mph in the afternoon.

A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 69.

A 30 percent chance of showers after 3pm. Mostly sunny, with a high near 87. Calm wind becoming west around 5 mph in the afternoon.

A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 66.








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.
The Wednesday Evening update - 8/5 will be later than usual. Expect a limited update Thursday morning 8/6. Otherwise normal scheduling prevails.
Skies were mostly clear here in Peterborough, NH this morning. A comfortable 59 degrees with a dew point temp at 59 as well. All of that begins to change today as warmer, more humid air begins to enter our region. Very warm and humid weather is expected through the end of the week, and into the weekend. Daily afternoon thunderstorm chances as well, making the next seven days feel pretty much like the beginning of August.
Warm, increasingly humid weather will continue across the region through the rest of the week as high pressure remains in control. The hottest days are expected on Thursday and Friday, with many locations south of the mountains reaching the upper 80s to lower 90s. Beginning Thursday and continuing into the weekend, higher humidity will lead to a daily chance of afternoon and evening showers and thunderstorms, although not everyone will see rain each day. A cold front arriving this weekend is expected to bring the best chance for more widespread showers and storms before slightly cooler temperatures return early next week.
From the Weather Channel:
You're not imagining it: This summer's wildfire season in the Northwest is already much worse than usual. Since the first of the year, Oregon and Washington alone have seen 58 large fires burn more than 1.8 million acres. For context, the five-year average at this point in the year is 49 large fires and around 526,000 acres, meaning these two states are already well beyond three times worse than what they've seen in recent years.
Of course, experts have been warning about this since last winter, when the West saw much less snow than usual. Since then, we've seen all the ingredients for a regionwide disaster fall like dominoes. First, the warmest March ever recorded in our country melted a huge dent in the meager snowpack. This left forests and rangeland desiccated by midsummer, when two separate lightning outbreaks in July ignited dozens of fires, many in central Oregon. Most recently, heat and drought prompted a statewide emergency declaration in Washington. And then the wind arrived, turning a bad season into an emergency.
It came from the north late last week. A strong storm tracked across British Columbia and Alberta, its southern edge raking the Pacific Northwest with gusts of 35 to 50 mph, and even higher across the mountains of eastern Washington. Seeing it coming, forecasters reached for language they'd never used before, attaching a "particularly dangerous situation" tag to Saturday's red flag warning for eastern Washington and northeastern Oregon. It was the first time that phrasing has ever appeared in either state.
By Saturday afternoon, the warning had verified in Spokane County, where fires jumped the Spokane River and tore into neighborhoods. Three blazes destroyed hundreds of structures, forced some 60,000 people from their homes, and remained completely uncontained through Sunday.
Fire weather conditions are expected to worsen later this week, leaving exhausted firefighters little time to try to control the region's raging infernos. Meanwhile, the wind has shifted, billowing toxic ground-level smoke to the highly populated western parts of both Washington and Oregon. Expect air quality in the code orange range (unhealthy for sensitive groups) with stretches of code red (unhealthy for everyone), especially in western Oregon. If you have asthma, heart or lung conditions, or young kids at home, this is a good day to close the windows, run a filter if you have one, and move the workout indoors. Check your air quality here, and remember: Those N95 masks you might still have lying around can be an important protection against breathing in tiny toxic particles.
Check out the enhanced "Todays Weather at a Glance" section above.
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On this day in history:
On this day in 1790, Congress authorized a fleet of 10 boats to chase down smugglers and collect tariffs along the coast. That little squadron, the Revenue Cutter Service, eventually became the U.S. Coast Guard, which turns 236 today.

Summary:
Warm, increasingly humid weather will continue across the region through the rest of the week as high pressure remains in control. The hottest days are expected on Thursday and Friday, with many locations south of the mountains reaching the upper 80s to lower 90s. Beginning Thursday and continuing into the weekend, higher humidity will lead to a daily chance of afternoon and evening showers and thunderstorms, although not everyone will see rain each day. A cold front arriving this weekend is expected to bring the best chance for more widespread showers and storms before slightly cooler temperatures return early next week.
Key Messages:
- Warmer and more humid weather builds through the remainder of the week as high pressure remains in control of the weather pattern.
- Increasing moisture Thursday into the weekend will bring daily chances for showers and thunderstorms.
What has changed since the last Forecast Update?
No significant changes with this forecast update.
What this means for you:
If you have outdoor plans, expect hot afternoons with increasing humidity through the end of the workweek. Keep water handy, take breaks if spending time outside, and be prepared for scattered afternoon thunderstorms from Thursday into the weekend. While many hours will remain dry, having an umbrella or rain jacket nearby is a good idea. The greatest likelihood of more widespread rain and thunderstorms currently appears to be on Saturday.
**Area Forecast Discussion, National Weather Service Gray ME**
**623 AM EDT Wednesday, August 5, 2026**
**What Has Changed**
No significant changes early this Wednesday morning.
**Key Messages**
1. Warmer and more humid weather builds through the remainder of the week as high pressure remains in control of the weather pattern.
2. Increasing moisture Thursday into the weekend will bring daily chances for showers and thunderstorms.
**Discussion**
**Key Message 1 Description**
A strong area of high pressure centered over the western Atlantic, often called the Bermuda High, will remain in place through the rest of the week and into the upcoming weekend. This weather pattern will keep warm and somewhat humid air flowing into New England.
High temperatures today will generally reach the middle to upper 80s. From Thursday through Sunday, temperatures will climb into the lower 90s across areas south of the mountains and away from the immediate coastline. Afternoon thunderstorms could keep temperatures a little lower on Saturday and Sunday, making Thursday and Friday the warmest days of the period. Northern areas will generally remain in the 80s each day.
Humidity will be fairly comfortable today, with dew points in the upper 50s to lower 60s. By Thursday through Saturday, dew points are expected to rise into the middle to upper 60s, with a few locations approaching 70 degrees.
Forecast confidence is somewhat lower regarding exactly how humid it becomes. If drier air from higher in the atmosphere mixes down to the surface, humidity may not become quite as high as some forecast guidance suggests, even while temperatures reach the upper 80s or lower 90s. Even so, afternoon heat index values, the feels like temperature that combines heat and humidity, could approach Heat Advisory criteria in parts of southern New England by late week.
Nighttime temperatures will remain mild, with most locations staying in the 60s each night, although not as warm as during some earlier heat events this summer.
Several cold fronts are expected to move through the region during the weekend and into early next week, bringing cooler temperatures as the middle of August approaches.
**Key Message 2 Description**
A persistent southwest wind pattern will continue through the remainder of the week as a ridge of high pressure remains over the western Atlantic and a broad trough of lower pressure stays to the west. This setup will bring higher humidity, with dew points rising into the upper 60s to around 70 degrees.
As daytime heating develops, the atmosphere should become unstable enough to support scattered showers and thunderstorms.
Forecast guidance from the National Blend of Models, or NBM, based on the 3:19 PM EDT Tuesday forecast cycle, indicates a 60 to 90 percent chance of at least 500 joules per kilogram of Convective Available Potential Energy, or CAPE. CAPE is a measure of how much energy is available for thunderstorms to develop. Forecast guidance also suggests wind shear of 25 to 30 knots, meaning winds change speed or direction with height, which can help some storms become better organized.
The main limiting factor is the lack of a strong weather system to trigger widespread storm development. As a result, showers and thunderstorms are expected to remain scattered on most days rather than becoming widespread.
The best opportunity for more widespread precipitation and thunderstorms currently appears to be Saturday, when a cold front is expected to move through the area. Details will become clearer as the event gets closer, but for now expect a typical summer pattern where afternoon showers or thunderstorms are possible and it is wise to have an umbrella or raincoat available.
Forecast models continue to agree that the weather pattern will shift to a more west to east flow in the middle levels of the atmosphere early next week. This should help level off temperatures and humidity somewhat, although the overall weather pattern is expected to remain unsettled.
Summary:
A stretch of classic midsummer weather is on the way for southern New England. Today will remain mostly dry with increasing humidity and plenty of sunshine. Beginning Thursday, heat and humidity build significantly, with afternoon temperatures around 90 degrees and heat index values climbing into the upper 90s, occasionally near 100 degrees. A few afternoon and evening thunderstorms are possible each day through the weekend. Some storms could produce heavy rainfall, frequent lightning, gusty winds, and localized flooding.
Key Messages:
- Generally dry today with increasing humidity. Low risk for early morning showers across the Islands.
- Summer heat and humidity returns Thursday through the weekend with chances for scattered afternoon and evening thunderstorms each day.
What has changed since the last Forecast Update?
Confidence continues to increase that southern New England will experience a prolonged period of high heat and humidity through the second half of the week and into the weekend.
What this means for you
Enjoy one of the more comfortable days of the week today before the heat and humidity increase. If you have outdoor plans later this week, be prepared for dangerous heat during the afternoon and keep an eye on the sky for developing thunderstorms. Some storms may produce very heavy rainfall in a short period of time, which could cause isolated flooding in poor drainage and low lying areas.
**Area Forecast Discussion, National Weather Service Boston/Norton MA**
**701 AM EDT Wednesday August 5 2026**
**What Has Changed**
Confidence continues to increase that southern New England will experience a prolonged period of high heat and humidity through the second half of the week and into the weekend.
**Key Messages**
* Generally dry today with increasing humidity. Low risk for early morning showers across the Islands.
* Summer heat and humidity returns Thursday through the weekend with chances for scattered afternoon and evening thunderstorms each day.
**Discussion**
**Key Message 1, Generally dry today with increasing humidity. Low risk for early morning showers across the Islands.**
Weak high pressure centered over western Connecticut has brought mostly clear skies and light winds across southern New England. Those calm conditions have allowed some patchy river valley fog to develop and temperatures have dropped to around 60 degrees in the normally cooler valleys.
Meanwhile, a weak area of low pressure has developed over the coastal waters south of New England. A few showers have formed over the far southeastern waters, with a slight chance that some of those showers could briefly move toward Nantucket during the early morning hours.
High pressure is expected to remain near New York City today, keeping most of southern New England dry. The offshore low will slowly drift farther east and away from the region. As that happens, winds will gradually turn from the south, bringing warmer and more humid air into the area. Dew points, a measure of how much moisture is in the air and how humid it feels, are expected to rise steadily and approach 70 degrees by this evening.
High temperatures today will reach the middle to upper 80s with abundant sunshine.
**Key Message 2, Summer heat and humidity returns Thursday through the weekend with chances for scattered afternoon and evening thunderstorms each day.**
A Bermuda High, a large area of high pressure over the western Atlantic Ocean, will strengthen and help draw very warm and humid air into southern New England. Southerly winds will continue overnight, allowing dew points to climb into the middle to upper 70s by Thursday, creating very humid conditions.
Temperatures about 2,500 feet above the ground, known as the 925 millibar level, are forecast to reach around 72 degrees. That supports afternoon high temperatures near 90 degrees from Thursday through Saturday. Combined with dew points between 72 and 76 degrees, it will feel like the upper 90s and may briefly approach 100 degrees in some locations.
Heat advisories or other heat related alerts are being considered for the latter half of the week and possibly into the weekend. Some uncertainty remains regarding just how hot conditions will become because afternoon thunderstorms could limit daytime heating.
Several weak disturbances in the upper levels of the atmosphere are expected to move through New England later this week. Combined with the hot, humid air and enough atmospheric instability, these features should be enough to trigger scattered afternoon and evening showers and thunderstorms each day from Thursday through the weekend. The greatest chance appears to be across the interior on Thursday.
Any thunderstorms that develop could produce frequent lightning, gusty winds, and torrential rainfall. Atmospheric moisture levels, measured as precipitable water, are expected to be around 2.0 inches, indicating the atmosphere will contain plenty of moisture for heavy rain. Because southern New England has already received significant rainfall over the past week, additional heavy downpours could result in localized flooding.

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