Dennis, MA Weather & Growing Conditions
Today
80°F
Mostly Sunny
Mostly sunny, with a high near 80. Southwest wind 3 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Mostly Sunny | 3 to 8 mph SW | 0% |
| Tonight | 67°F | Mostly Cloudy then Slight Chance Rain Showers | 2 to 7 mph S | 15% |
| Wednesday | 79°F | Slight Chance Rain Showers then Mostly Sunny | 2 to 8 mph W | 16% |
| Wednesday Night | 69°F | Mostly Cloudy | 8 mph SW | 4% |
| Thursday | 82°F | Mostly Sunny | 6 to 12 mph SW | 4% |
| Thursday Night | 72°F | Partly Cloudy | 12 mph SW | 2% |
| Friday | 82°F | Mostly Sunny | 8 to 13 mph SW | 4% |
| Friday Night | 71°F | Partly Cloudy | 6 to 13 mph SW | 9% |
| Saturday | 81°F | Mostly Sunny | 6 to 9 mph SW | 13% |
| Saturday Night | 71°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 9 mph SW | 17% |
| Sunday | 81°F | Mostly Sunny | 5 to 10 mph SW | 11% |
| Sunday Night | 71°F | Partly Cloudy | 7 to 10 mph SW | 9% |
| Monday | 81°F | Mostly Sunny | 7 to 13 mph SW | 9% |
| Monday Night | 70°F | Partly Cloudy | 13 mph SW | 7% |
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 Aug 4, 2026.