Newtown, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newtown, a borough in Fairfield County, Connecticut.
Today
82°F
Sunny
Sunny, with a high near 82. West wind around 3 mph.
7-day forecast for Newtown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Sunny | 3 mph W | 0% |
| Tonight | 61°F | Mostly Cloudy | 3 mph W | 1% |
| Wednesday | 81°F | Partly Sunny | 2 to 6 mph SW | 11% |
| Wednesday Night | 67°F | Slight Chance Rain Showers | 5 mph S | 22% |
| Thursday | 86°F | Showers And Thunderstorms Likely | 2 to 8 mph SW | 62% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 to 7 mph SW | 53% |
| Friday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph SW | 47% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 5 mph W | 43% |
| Saturday | 85°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph W | 39% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 5 mph W | 39% |
| Sunday | 86°F | Mostly Sunny | 2 to 7 mph W | 11% |
| Sunday Night | 69°F | Mostly Clear | 5 mph W | 11% |
| Monday | 88°F | Sunny then Slight Chance Showers And Thunderstorms | 2 to 9 mph W | 17% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms | 3 to 8 mph W | 17% |
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
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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 Aug 4, 2026.