Newtown, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newtown, a borough in Fairfield County, Connecticut.
Tonight
52°F
Mostly Cloudy
Mostly cloudy. Low around 52, with temperatures rising to around 54 overnight. Southeast wind around 3 mph.
7-day forecast for Newtown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Cloudy | 3 mph SE | 2% |
| Sunday | 66°F | Rain Showers then Rain | 5 to 9 mph SE | 98% |
| Sunday Night | 52°F | Rain then Rain Showers Likely | 5 to 12 mph SE | 88% |
| Monday | 67°F | Partly Sunny | 7 to 12 mph N | 9% |
| Monday Night | 47°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 9 mph NE | 21% |
| Tuesday | 62°F | Slight Chance Rain Showers | 10 mph NE | 22% |
| Tuesday Night | 46°F | Mostly Cloudy | 7 to 13 mph NE | 7% |
| Wednesday | 64°F | Partly Sunny | 12 to 15 mph NE | 5% |
| Wednesday Night | 46°F | Slight Chance Rain Showers | 15 mph NE | 19% |
| Thursday | 63°F | Chance Rain Showers | 12 to 16 mph NE | 27% |
| Thursday Night | 47°F | Chance Rain Showers | 12 to 18 mph NE | 37% |
| Friday | 63°F | Chance Rain Showers | 13 to 18 mph N | 39% |
| Friday Night | 48°F | Chance Rain Showers | 17 mph N | 38% |
| Saturday | 66°F | Chance Rain Showers | 12 to 17 mph N | 27% |
Forecast source: National Weather Service (api.weather.gov) for Newtown (41.412, -73.312). Updated through the day.
Growing snapshot for Newtown
Last spring frost
Apr 20
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
6b
More local growing data for Newtown: nearby ZIP 06470 weather · frost dates · planting calendar · Connecticut frost dates
Nearby towns & communities
Ball Pond
Bethel
Bigelow Corners
Bogus Hill
Botsford
Branchville
Bridgeport
Brookfield Center
Candlewood Isle
Candlewood Knolls
Candlewood Lake Club
Candlewood Orchards
Candlewood Shores
Cannondale
Chimney Point
Coleytown
Compo
Cos Cob
Danbury
Daniels Farm
Darien Downtown
Dodgingtown
East Village
Fairfield University
Georgetown
Greens Farms
Greenwich
Hawleyville
Indian Field
Inglenook
Climate data from the nearest NOAA station, Danbury, Ct (5.4 mi from Newtown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.