Mill Plain, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mill Plain, a community in Fairfield County, Connecticut.
Overnight
54°F
Partly Cloudy
Partly cloudy, with a low around 54. North wind around 10 mph.
7-day forecast for Mill Plain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Partly Cloudy | 10 mph N | 0% |
| Saturday | 68°F | Mostly Sunny | 9 mph E | 0% |
| Saturday Night | 58°F | Mostly Cloudy | 3 to 7 mph E | 6% |
| Sunday | 68°F | Showers And Thunderstorms | 7 to 13 mph SE | 87% |
| Sunday Night | 58°F | Showers And Thunderstorms | 3 to 13 mph S | 87% |
| Monday | 67°F | Chance Rain Showers | 10 to 14 mph NE | 46% |
| Monday Night | 53°F | Slight Chance Rain Showers | 9 to 15 mph NE | 24% |
| Tuesday | 64°F | Chance Rain Showers | 16 mph NE | 25% |
| Tuesday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 17 mph NE | 23% |
| Wednesday | 64°F | Mostly Cloudy then Slight Chance Rain Showers | 18 mph NE | 15% |
| Wednesday Night | 51°F | Chance Rain Showers | 15 to 18 mph NE | 31% |
| Thursday | 63°F | Chance Rain Showers | 18 mph NE | 32% |
| Thursday Night | 51°F | Chance Rain Showers | 17 mph NE | 35% |
| Friday | 66°F | Chance Rain Showers | 13 to 16 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov) for Mill Plain (41.155, -73.268). Updated through the day.
Growing snapshot for Mill Plain
Last spring frost
Apr 5
First fall frost
Nov 6
Growing season
216 days
Hardiness zone
7a
More local growing data for Mill Plain: nearby ZIP 06890 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, Bridgeport Sikorsky Mem Ap, Ct (8.3 mi from Mill Plain). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.