Dennis, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dennis, a community in Barnstable County, Massachusetts.
Tonight
53°F
Mostly Cloudy
Mostly cloudy, with a low around 53. Southwest wind around 9 mph.
7-day forecast for Dennis
| 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) for Dennis (41.730, -70.197). Updated through the day.
Growing snapshot for Dennis
Last spring frost
Apr 22
First fall frost
Oct 28
Growing season
188 days
Hardiness zone
7b
More local growing data for Dennis: nearby ZIP 02638 weather · frost dates · planting calendar · Massachusetts frost dates
Nearby towns & communities
Barnstable Town
Bourne
Brewster
Buzzards Bay
Chatham
Dennis Port
East Dennis
East Falmouth
East Harwich
East Sandwich
Falmouth
Forestdale
Harwich Center
Harwich Port
Mashpee Neck
Monomoscoy Island
Monument Beach
New Seabury
North Eastham
North Falmouth
Northwest Harwich
Orleans
Pocasset
Popponesset
Popponesset Island
Provincetown
Sagamore
Sandwich
Seabrook
Seconsett Island
Climate data from the nearest NOAA station, Hyannis Barnstable Muni Ap, Ma (6 mi from Dennis). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.