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Heat Advisory HEAT ADVISORY - Hillsborough  - Nashua  - Portsmouth Seacoast  - Rockingham
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A period of hot a breezy weather is expected Tuesday and Wednesday as temperatures climb into the upper 80s and low 90s ahead of a cold front. Strong to severe thunderstorms will be possible Tuesday ahead of the front with another round of showers and storms Wednesday as the front crosses. It will also be breezy on Tuesday and Wednesday with gusts of 25 to 35 mph possible. Cooler and drier weather follows the front for Thursday and Friday.
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Updated: @ 05/18/2026 18:30 - next update at 18:35  
Summary / Temperature Wind Rain Outlook
Clear Clear
Currently: 74.8, Max: 81.5, Min: 52.9 74.8°F
Colder 2.9°F than last hour.

Comfortable

Feels like: 75°F

24-hr difference
-5.9°FColder 5.9°F than yesterday at this time.
  Today Yesterday
High: 81.5°F
16:03 		83.1°F
14:25
Low: 52.9°F
04:40 		52.3°F
05:19
Wind from ESE ESE
1
Gust:
 3 mph
0 Bft - Calm
Today: 8 mph 14:12
Gust Month: 23 mph May 07
Rain Today: 0 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
Storm Rain: 0 in
This Month: 3.62 in
Season Total: 9.1 in
8 rain days in May.
Tuesday

Tuesday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Humidity & Barometer Almanac Moon
Humidity: 49 % Increased 2.0% since last hour.
Dew Point: 54.4°F Decreased 1.8°F since last hour.
Barometer: 29.965 inHg  
Baro Trend: Steady
Sunrise: 05:19
Sunset: 20:07
Moonrise: 06:20
Moonset: 23:02
Waxing Crescent
Waxing Crescent, Moon at 3 days in cycle
7%
Illuminated
UV Index Solar Radiation
   0.0    None
High: 7.0 @ 11:27
30 W/m2 (18 %)
High: 795 @  13:28
 NWS Weather Forecast  - Outlook: Tonight & Tuesday
Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 56 °F		 NWS forecast: Mostly clear, with a low around 56. Southeast wind 0 to 5 mph.
 
Tuesday

Tuesday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms

Hi 91 °F		 NWS forecast: A chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 91. Southwest wind 0 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.