Mill Plain, CT Weather & Growing Conditions
Overnight
54°F
Partly Cloudy
Partly cloudy, with a low around 54. Northeast wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Partly Cloudy | 10 mph NE | 0% |
| Saturday | 68°F | Mostly Sunny | 9 mph E | 0% |
| Saturday Night | 57°F | Mostly Cloudy | 5 to 8 mph SE | 6% |
| Sunday | 68°F | Showers And Thunderstorms | 7 to 12 mph SE | 88% |
| Sunday Night | 57°F | Showers And Thunderstorms | 3 to 13 mph S | 88% |
| Monday | 67°F | Chance Rain Showers | 10 to 14 mph NE | 45% |
| Monday Night | 53°F | Slight Chance Rain Showers | 8 to 14 mph NE | 24% |
| Tuesday | 63°F | Chance Rain Showers | 16 mph NE | 25% |
| Tuesday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 16 mph NE | 23% |
| Wednesday | 63°F | Mostly Cloudy then Slight Chance Rain Showers | 15 to 18 mph NE | 15% |
| Wednesday Night | 51°F | Chance Rain Showers | 17 mph NE | 31% |
| Thursday | 63°F | Chance Rain Showers | 15 to 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). Updated through the day.
Growing snapshot for Mill Plain, CT
Last spring frost
Apr 5
First fall frost
Nov 6
Growing season
216 days
Hardiness zone
7a
Explore more for Mill Plain, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Bridgeport Sikorsky Mem Ap, Ct (8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.