Groton stays cool in summer
Groton has cold, snowy winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 79°, a January night drops to 9°, and about 68 inches of snow falls in a normal winter. In November, a normal day reaches 44° and a normal night drops to 27°.
Getting the latest forecast from the National Weather Service…
What stands out about Groton’s weather
Read from 30 years of NOAA records. Each one opens the full story on the Climate page.
Where today sits in Groton’s year
Typical highs and lows month by month, from 30 years of NOAA records.
Weather talk
Road reports, first frosts and storm memories from neighbors in Groton.
Your answer becomes a post in Town Square.
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 Groton itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Plymouth, NH (11 mi, snow) and Grafton, NH (12 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.