Dennis, MA Weather & Growing Conditions
Tonight
53°F
Mostly Cloudy
Mostly cloudy, with a low around 53. Southwest wind around 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Mostly Cloudy | 9 mph SW | 5% |
| Wednesday | 66°F | Sunny | 8 to 14 mph SW | 6% |
| Wednesday Night | 56°F | Patchy Fog | 8 to 12 mph SW | 3% |
| Thursday | 67°F | Partly Sunny | 8 to 13 mph SW | 4% |
| Thursday Night | 59°F | Mostly Cloudy then Chance Light Rain | 10 mph SW | 53% |
| Friday | 65°F | Light Rain | 8 to 12 mph S | 84% |
| Friday Night | 57°F | Rain | 9 mph S | 87% |
| Saturday | 61°F | Light Rain | 10 mph SW | 84% |
| Saturday Night | 49°F | Chance Light Rain | 10 mph W | 54% |
| Sunday | 57°F | Chance Light Rain | 7 to 12 mph W | 29% |
| Sunday Night | 46°F | Partly Cloudy | 10 mph W | 12% |
| Monday | 56°F | Chance Light Rain | 10 to 14 mph W | 27% |
| Monday Night | 44°F | Chance Light Rain | 13 to 16 mph W | 27% |
| Tuesday | 56°F | Slight Chance Light Rain then Sunny | 20 mph W | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Dennis, MA
Last spring frost
Apr 22
First fall frost
Oct 28
Growing season
188 days
Hardiness zone
7b
Explore more for Dennis, MA: full frost dates · planting calendar · Massachusetts frost dates
Climate data from the nearest NOAA station, Hyannis Barnstable Muni Ap, Ma (6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.