Dennis, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dennis, a community in Barnstable County, Massachusetts.
Overnight
53°F
Partly Cloudy
Partly cloudy, with a low around 53. Southwest wind around 8 mph.
7-day forecast for Dennis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Partly Cloudy | 8 mph SW | 2% |
| Wednesday | 66°F | Sunny | 8 to 14 mph SW | 3% |
| Wednesday Night | 58°F | Partly Cloudy then Patchy Fog | 10 mph SW | 3% |
| Thursday | 67°F | Patchy Fog then Partly Sunny | 8 to 13 mph SW | 2% |
| Thursday Night | 60°F | Light Rain Likely | 12 mph SW | 61% |
| Friday | 65°F | Light Rain | 10 mph S | 94% |
| Friday Night | 57°F | Light Rain | 9 mph S | 96% |
| Saturday | 62°F | Light Rain | 9 mph SW | 88% |
| Saturday Night | 49°F | Slight Chance T-storms | 8 to 14 mph W | 21% |
| Sunday | 57°F | Slight Chance Light Rain then Mostly Sunny | 9 to 14 mph W | 18% |
| Sunday Night | 46°F | Partly Cloudy | 8 to 12 mph W | 9% |
| Monday | 56°F | Chance Light Rain | 12 to 15 mph W | 29% |
| Monday Night | 43°F | Slight Chance Light Rain then Partly Cloudy | 13 mph W | 24% |
| Tuesday | 56°F | Sunny | 16 mph W | 7% |
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.