Newtown, CT Weather & Growing Conditions
Overnight
50°F
Mostly Cloudy
Mostly cloudy. Low around 50, with temperatures rising to around 52 overnight. North wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Mostly Cloudy | 6 mph N | 0% |
| Saturday | 68°F | Mostly Sunny | 5 to 8 mph NE | 0% |
| Saturday Night | 51°F | Mostly Cloudy | 5 mph SE | 3% |
| Sunday | 65°F | Rain | 5 to 8 mph SE | 96% |
| Sunday Night | 52°F | Rain | 5 to 10 mph E | 95% |
| Monday | 66°F | Slight Chance Light Rain then Partly Sunny | 8 to 12 mph N | 19% |
| Monday Night | 46°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 10 mph NE | 15% |
| Tuesday | 61°F | Slight Chance Rain Showers | 12 mph NE | 20% |
| Tuesday Night | 45°F | Slight Chance Rain Showers then Mostly Cloudy | 9 to 14 mph NE | 18% |
| Wednesday | 63°F | Partly Sunny | 13 to 16 mph NE | 8% |
| Wednesday Night | 45°F | Mostly Cloudy then Chance Rain Showers | 13 to 16 mph NE | 26% |
| Thursday | 61°F | Chance Rain Showers | 17 mph NE | 31% |
| Thursday Night | 46°F | Chance Rain Showers | 16 mph N | 37% |
| Friday | 62°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 Newtown, CT
Last spring frost
Apr 20
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
6b
Explore more for Newtown, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Danbury, Ct (5.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.