Extreme Heat Warning EXTREME HEAT WARNING - Belknap  - Caroll N  - Caroll S  - Cheshire/Keene  - Concord/Merrimack  - Grafton N  - Grafton S  - Hillsborough  - Nashua  - Portsmouth Seacoast  - Rockingham  - Strafford  - Sullivan
Heat Advisory HEAT ADVISORY - Coos North  - Coos South  - Grafton N  - Grafton S
Air Quality Alert AIR QUALITY ALERT - Portsmouth Seacoast  - Rockingham

The hot and humid conditions begin on Wednesday, and continue through at least Friday across northern New England. The heat peaks on Thursday, with only a gradual cool down expected into the weekend. Nighttime lows in the 70s offer little relief, and result in accumulated heat stress. Starting late today through the end of the week the ingredients will be there for thunderstorms, some of which could be strong to severe. SPC has a Marginal Risk for severe storms for at least a portion of our area late today through Thursday.
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Updated: @ 06/30/2026 18:20 - next update at 18:25  
Summary / Temperature Wind Rain Outlook
Overcast Overcast
Currently: 73.7, Max: 88.2, Min: 55.9 73.7°F
Colder 7.2°F than last hour.

Comfortable

Feels like: 74°F

24-hr difference
-7.7°FColder 7.7°F than yesterday at this time.
  Today Yesterday
High: 88.2°F
13:15
85.1°F
13:46
Low: 55.9°F
05:26
55°F
05:13
 Calm
0
Gust:
0 mph
0 Bft - Calm
Today: 7 mph 17:34
Gust Month: 19 mph June 26
Rain Today: 0.04 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
Storm Rain: 0.04 in
This Month: 4.01 in
Season Total: 15.72 in
10 rain days in June.
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Humidity & Barometer Almanac Moon
Humidity: 93 % Increased 14.0% since last hour.
Dew Point: 71.6°F Decreased 2.4°F since last hour.
Barometer: 29.886 inHg Rising 0.02  inHg/hr
Baro Trend: Steady
Sunrise: 05:10
Sunset: 20:30
Moonset: 05:18
Moonrise: 21:29
Full Moon
Full Moon, Moon at 15 days in cycle
99%
Illuminated
UV Index Solar Radiation
   0.0    None
High: 8.0 @ 13:19
28 W/m2 (10 %)
High: 847 @  13:24
 NWS Weather Forecast  - Outlook: Tonight & Wednesday
Tonight

Tonight: Showers And Thunderstorms Likely
Showers And T-Storms Likely

Lo 65 °F
NWS forecast: A chance of rain showers before 8pm, then showers and thunderstorms likely between 8pm and 10pm, then a chance of showers and thunderstorms between 10pm and 11pm, then a chance of showers and thunderstorms between 11pm and 1am, then a slight chance of showers and thunderstorms between 1am and 3am, then a chance of showers and thunderstorms between 3am and 4am. Mostly cloudy, with a low around 65. Southwest wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
 
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny

Hi 97 °F
NWS forecast: Mostly sunny, with a high near 97. Heat index values as high as 109. West wind 0 to 5 mph. New rainfall amounts less than a tenth of an inch possible.