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Last Complete Site Update: 7/12 - 7:04 AM
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'July, with its days of blue skies and time that seemingly stands still,
holds a special place in my heart'
- Daisaku Ikeda
Now in Peterborough, NH
Time of the readings below: 12 Jul 2025 11:14 AM
Current Weather Readings
(FYI: The number in parenthesis below is the change in the last hour)
Your Daily Forecast - Three Days at a Time
Current Hazards - None
Monday/Monday Night - 7/14
Nashua - East
A 50 percent chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon.
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 67.
Peterborough - Central/West
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 81. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 60%.
Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 64. Chance of precipitation is 60%.
Tuesday/Tuesday Night - 7/15
Nashua - East
Sunny and hot, with a high near 92.
Mostly clear, with a low around 69.
Peterborough - Central/West
Sunny, with a high near 87.
Mostly clear, with a low around 65.
Wednesday/Wednesday Night - 7/16
Nashua - East
Peterborough - Central/West
Thursday/Thursday Night - 7/17
Nashua - East
Peterborough - Central/West
Friday/Friday Night - 7/11
Nashua - East
Peterborough - Central/West
Saturday/Saturday Night - 7/12
Nashua - East
A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Areas of fog before 9am. Otherwise, partly sunny, with a high near 85. Calm wind becoming southeast around 5 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Patchy fog after midnight. Otherwise, increasing clouds, with a low around 63. Southeast wind around 5 mph becoming calm in the evening.
Peterborough - Central/West
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 80. Calm wind becoming south around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 61. Calm wind. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday/Sunday Night - 7/13
Nashua - East
Cloudy, then gradually becoming mostly sunny, with a high near 83. Calm wind becoming southeast around 5 mph in the afternoon.
Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 65. Southeast wind around 5 mph becoming calm in the evening.
Peterborough - Central/West
Cloudy, then gradually becoming mostly sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.
Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 63. Southeast wind around 5 mph becoming calm.
Rich's Weather Discussion
New Hampshire/North Briefing
Massachusetts/South Briefing
At this moment: 7/12 - 7:03 AM
A note from Rich:
I am back on our regular schedule.
Dense Fog was being reported in coastal areas of Maine this morning. That may take a while to burn off. Meanwhile a thunderstorm complex has moved through Albany NY and is headed east.
Warm and humid weather continues today with a chance for afternoon showers and thunderstorms mostly inland.
Much warmer weather arrives next week with a Bermuda High in place.
It is July, and the heat is on. In Greece, it was so hot on Tuesday that the Acropolis temporarily closed. In China and Japan, meanwhile, July heat records are being broken daily amid incessant sweltering heat. In fact, there are multiple heat waves all across the Northern Hemisphere as we move into what is usually the hottest time of the year, including in the U.S., where much of the West has been baking under a heat wave this week. Phoenix hit a record 118 degrees yesterday, while Wyoming saw temperatures up to 106 degrees.
If you've ever decided to have a picnic on a hot summer day, you may well have chosen a picnicking spot in the inviting shade under a tree. I always assumed that it was the shade that makes such a spot pleasant in hot weather, but it turns out that there's more to it than that, and it has to do with the wind. According to writer Tristan Gooley, "when any wind passes a tree, the tree gets in its way. This causes changes in the air pressure on all sides of the tree. This leads to a breeze under a tree that is faster and stronger than the breeze away from the tree." In other words, a large tree functions like a giant fan. See if you can feel the difference the next time you're out in hot weather.
***Maine and New Hampshire Hurricane Preparedness Week***
Today’s Subject - Assemble Disaster Supplies
You’re going to need supplies not just to get through the storm but for the potentially lengthy and unpleasant aftermath. New Englanders are no strangers to storm power outage impacts in the winter months but summer/fall hurricane power outage impacts are different because food will spoil. Have enough non-perishable food, water and medicine to last each person in your family a minimum of three days, but a week would be recommended. Electricity and water could be out for at least that long, especially if you have a well that depends on electricity. Make sure your generators are tested and in proper working order. You’ll need extra cash, gas, a battery-powered radio and flashlights. You may need a portable crank or solar-powered USB charger for your smart phones. Find out more about Disaster Supply Kits here:
* https://www.ready.gov/kit
* https://flash.org/programs/
The History Section has a lot of history to share, and I will be sharing video on this page from time to time.
Find beach and hiking information as well as travel info for the USA in the Travel and Leisure Section.
Find all Tropical Tracking on the Tropics 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 the section.
On this day:
On this day in 1862, President Abraham Lincoln signed a law establishing the U.S. Army Medal of Honor for noncommissioned officers and privates showing gallantry during the Civil War. In 1863, Congress extended eligibility to officers, recognizing their valor.
Weather Summaries and Full Area Forecast Discussions - North (Edited)
Summary - Northern New England - New Hampshire and Maine
Expect warm and humid conditions this weekend as a Bermuda high sets up shop over the region. A few showers or thunderstorms may pop up today, mainly away from the coast. Sunday looks drier overall, with patchy fog and low clouds early. A weak cold front brings the next round of scattered showers and storms on Monday, but severe weather looks unlikely. By midweek, heat and humidity start to build again, with temperatures potentially reaching the lower 90s by Wednesday or Thursday.
Click the Open/Close Button to Display the Full Edited Area Forecast Discussion
Area Forecast Discussion
National Weather Service Gray ME
618 AM EDT Sat Jul 12 2025
Synopsis
The Bermuda high will remain in place through the weekend, bringing a few showers and isolated thunderstorms today, mostly away from the coast. Sunday looks drier, before showers and thunderstorms return at the start of the new week. Heat and humidity will begin to build again by midweek.
Near Term (Through Tonight)
615 AM Update: A Dense Fog Advisory has been issued for much of western Maine and the Seacoast of New Hampshire due to low visibility reports. No other changes were made at this time.
Previous discussion: Radar early this morning shows some weakening thunderstorms slowly moving from Vermont into north-central New Hampshire. Lightning has decreased, and radar data shows lower storm tops, likely due to a drop in mixed-layer convective available potential energy (MLCAPE), which is a measure of thunderstorm fuel in the lower atmosphere. This is supported by recent Storm Prediction Center (SPC) data. Some storms are still passing over the same areas, which is called training, and localized rainfall rates have reached over 1 inch per hour. However, the risk of flooding remains low.
Dense fog is ongoing south of the mountains and will persist through early morning. Temperatures are in the 60s and low 70s and are not expected to fall much further before sunrise.
Today, surface high pressure will move east as a ridge in the mid-level atmosphere builds. Short-term high-resolution models show a narrow band of increased mid-level vorticity, which is a spinning motion in the atmosphere that helps lift air, moving through the region this afternoon. It will coincide with moderate daytime instability but weak deep-layer shear, or wind difference with height. This setup may produce isolated, short-lived thunderstorms, sometimes called "pulse storms." The risk of severe weather is low. Skies will be partly to mostly cloudy, with highs in the 70s for most of western Maine and in the lower to middle 80s in New Hampshire.
Short Term (Sunday)
Surface high pressure will remain south of Nova Scotia tonight and into Sunday. Any inland thunderstorms will likely fade after sunset as the atmosphere stabilizes. Onshore winds are expected to bring in fog and low clouds once again. Low temperatures will remain mainly in the 60s.
A cold front will continue to move east from the Great Lakes on Sunday. However, high pressure nearby should keep the region mostly dry. Along the coast, clouds may linger into the morning. A tightening pressure gradient during the day will help mix and scatter the cloud cover in inland areas by afternoon. Highs will climb into the 80s in much of New Hampshire and far interior western Maine. Coastal areas in western Maine may stay in the 70s due to onshore flow and more persistent cloud cover.
Long Term (Sunday Night Through Friday)
Long Term Update: The latest run of the National Blend of Models (NBM) does not show many changes, aside from a slight increase in rain chances on Monday. A weakening cold front will move into the region, and models still show enough instability for thunderstorms, although wind shear will be weak. This lack of wind organization and limited forcing will likely prevent strong or severe storms. However, precipitable water values (PWATs), a measure of how much moisture is in the air, will rise to around 2 inches. This could lead to localized downpours.
After the front passes, drier air settles in through midweek. Heat and humidity are expected to build again.
Previously:
High pressure will drift farther northeast of the area Sunday night. A well-developed low pressure system near southern Hudson Bay will push a cold front through northern New England on Monday. Once the front passes, dry weather is expected to return through the middle of the week. However, temperatures will climb again, leading to hot and humid conditions.
A warm front lifting north Sunday night could bring scattered showers and thunderstorms to the western Maine mountains and northwest New Hampshire. Fog and low clouds will likely form overnight, keeping temperatures in the upper 60s to around 70 in southern New Hampshire.
On Monday, fog will clear out during the morning as the cold front slowly moves through the region. The front will act as a lifting trigger, but it is expected to weaken near the coast. In addition, winds throughout the atmosphere will be light, which limits the chance of strong storms. If skies clear enough for heating at the surface, some narrow and isolated updrafts could still produce scattered thunderstorms in the afternoon.
By midweek, temperatures will rise again. Model agreement is improving, which increases forecast confidence. While the exact level of humidity and heat may still vary slightly, current projections keep daytime highs just below official heat alert thresholds for most of the region. Southern New Hampshire has the best chance for a three-day stretch of hot weather.
Weather Summaries and Full Area Forecast Discussions - South (Edited)
Summary - Southern New England - Massachusetts/Northern CT/Rhode Island
Warm and humid conditions will hang around this weekend. Expect a few isolated showers and thunderstorms today, mostly over western and central areas. Things dry out a bit on Sunday before rain chances increase again Monday as a front moves through. Heat and humidity will build into the middle of next week, with real feel temps nearing 100 degrees in some spots by Wednesday and Thursday. A cold front may finally bring relief by Friday, along with a risk for more showers and storms.
Click the Open/Close Button to Display the Full Edited Area Forecast Discussion
Area Forecast Discussion
National Weather Service Boston/Norton MA
225 AM EDT Sat Jul 12 2025
Synopsis
Warm and muggy weather continues through the weekend. Isolated showers and storms could pop up across inland areas today. Sunday trends drier. A better shot at showers and thunderstorms returns Monday as a frontal system moves through. Expect rising heat and humidity by the middle of the week, followed by a potential cool down and another round of storms Friday when a cold front arrives.
Near Term through Today
Key Points
- Warm and humid again today
- Isolated showers and thunderstorms possible over the interior
Not much change in the air mass today as high pressure stays just offshore. Surface winds will shift more from the east southeast, but with dry air offshore, we are not expecting low clouds and fog to stick around all day, except maybe over the Cape and Islands.
High temperatures will reach the low to mid 80s with a mix of sun and clouds. Higher up in the atmosphere, winds begin to shift more from the southwest across western Massachusetts, New York, and Vermont. This helps set up a weak zone of convergence, where winds come together, which could trigger a few showers or thunderstorms over inland areas.
Short-range models run at 8 PM EDT (00Z) show this activity may stay mainly west, toward New York and Vermont. However, with about 1000 to 1500 joules per kilogram of mixed-layer CAPE, a measure of how unstable the air is, and only a weak lid on storm formation (a light "cap"), we may still see a few thunderstorms develop over the higher terrain in western Massachusetts.
The chance for severe storms is low because there is not much wind shear, the change in wind speed and direction with height, and mid-level lapse rates, the rate temperature cools with height, are around 5 Celsius per kilometer, which is on the weaker side.
Moisture in the atmosphere, known as precipitable water or PWAT values, is a bit higher today, around 1.5 inches. Some storms yesterday dumped 2 to 4 inches of rain in a short time, leading to flash flooding and flood warnings. If storms form again today, localized heavy rain and flash flooding could happen.
The high-resolution ensemble forecast, HREF, suggests there is a 30 to 50 percent chance that parts of western Massachusetts will see 1 inch of rain in 3 hours, and a 10 percent chance of 3 inches in that same time frame.
Short Term Tonight through 6 PM Sunday
Key Points
- Another mild night with patchy fog
- Sunday stays dry, warm, and humid
Tonight
Low temperatures tonight will settle into the low to mid 60s, matching the dewpoints. This means the air will be quite saturated, and areas of fog and low clouds will form again after sunset. Light east southeast winds continue near the surface.
Sunday
Sunday brings little change in the weather pattern. High pressure will remain anchored over the Gulf of Maine with a ridge of higher air pressure overhead in the middle layers of the atmosphere. Afternoon highs will again reach the low to mid 80s with dewpoints in the mid to upper 60s, keeping it humid.
Storm chances drop off because the zone of instability moves farther north, taking the convergence boundary with it. Most of southern New England will sit under a subsidence inversion, a technical term meaning the air is sinking and stable, which limits storm growth. After morning fog and low clouds burn off, skies will turn mostly sunny.
Long Term Sunday Night through Friday
Key Points
- Better shot at more widespread showers and storms Monday
- Hot and humid midweek with real-feel temps near 100 degrees
- Cooler, less humid air may return Friday with thunderstorms
Monday
Monday looks like the best chance in several days for widespread showers and storms. A stronger upper-level disturbance known as a shortwave trough and an associated surface front will move across the region in the afternoon into early evening.
Winds aloft will still be weak, although a bit stronger than earlier in the weekend. Instability is expected to be lower than Saturday, so while a stronger thunderstorm cannot be ruled out, most activity will likely be on the weaker side.
Temperatures will reach the mid 80s again, but humidity will increase and may make it feel a few degrees hotter.
Tuesday through Thursday
Heat and humidity will build as a ridge of high pressure moves overhead and offshore. This will keep things dry but steamy. Expect real-feel temperatures, or heat index values, to climb to the mid 90s to near 100 degrees, especially in the Connecticut and Merrimack Valleys.
Daytime highs will reach the upper 80s to mid 90s away from the coast. Nights will also be muggy with little cooling.
Some model members, GEPS and EPS ensembles, hint at disturbances offshore from the mid Atlantic region that could move northeast and bring some clouds or showers. Most forecast members do not support this idea right now, so the official forecast remains dry, but this could change if more data points in that direction.
Friday
Friday may bring another day of elevated heat and humidity, but signs point to a cold front approaching during the afternoon. This will raise the risk of showers and thunderstorms. Winds higher in the atmosphere are expected to be stronger, which could support a few stronger thunderstorms. Still plenty of time to fine-tune these details in the coming days.
Fall Begins on: September 22, at 2:19 PM EST
Five Day Daily Temperature Run - Peterborough, NH - Updated Daily
(Tip: Place your cursor over the bar to see the number)
Expected Temperatures in New England
Weather News/Headlines of Interest
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At least 6 dead in North Carolina after Southeast, mid-Atlantic hammered by flooding this week
Chicago amid increasing tornado threat across Iowa, Illinois as severe storms erupt in Midwest
Texas Hill Country recovery, cleanup teams to face brutal July weather conditions
Researchers claim Earth, Milky Way are trapped in cosmic void
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