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Weather in Sullivan, NH · National Weather Service + NOAA

Sullivan is snow country

Sullivan has cold, snowy winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 79°, a January night drops to 11°, and about 80 inches of snow falls in a normal winter. A typical November afternoon reaches 45°, and nights fall to 28°.

Winter 32°/14°Spring 54°/32°Summer 77°/54°Fall 58°/38°
Right now
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Sunrise 6:24 am · sunset 4:39 pm

Getting the latest forecast from the National Weather Service…

What stands out about Sullivan’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
Snow countryAbout 80 inches a winter, more than 95% of U.S. towns.Cool summersJuly afternoons average 79°, cooler than 94% of U.S. towns.Snow that staysSnow covers the ground about 106 days a year.The snowiest town aroundMore snow than any of the 4 towns around it with snow records.
A normal year

Where today sits in Sullivan’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
32° / 14°
24 days with an inch or more of snow
Spring
54° / 32°
Last frost around May 14
Summer
77° / 54°
11 days reach 90° in a normal year
Fall now
58° / 38°
First frost around Oct 1
Pastthe usual first frost (Oct 1). Last frost next spring: May 14
Best months to be outside
MayJunJulAugSep
Highs of 62–84° and lows of 40° or more
How much snow does Sullivan get?About 80 inches a winter.When is it wettest?October, with 5.1 inches.Is it warmer than it used to be?+1.8° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Sullivan.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Sullivan itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Marlow, NH (7 mi, snow) and Keene, NH (8 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.