Dennis has milder winters than most of Massachusetts
Dennis has chilly winters and pleasant summers. A typical July afternoon reaches 79°, a January night drops to 24°, and about 22 inches of snow falls in a normal winter. A typical November afternoon reaches 53°, and nights fall to 38°.
Getting the latest forecast from the National Weather Service…
What stands out about Dennis’s weather
Read from 30 years of NOAA records. Each one opens the full story on the Climate page.
Where today sits in Dennis’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 Dennis.
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 Dennis itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Hyannis, MA (8 mi, snow) and West Harwich, MA (4 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.