Newtown, CT Weather & Growing Conditions
Tonight
50°F
Partly Cloudy then Patchy Fog
Patchy fog after 1am. Partly cloudy, with a low around 50. Southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Partly Cloudy then Patchy Fog | 3 mph SW | 3% |
| Wednesday | 72°F | Patchy Fog then Sunny | 3 to 12 mph SW | 3% |
| Wednesday Night | 55°F | Partly Cloudy | 7 mph S | 2% |
| Thursday | 70°F | Chance Rain Showers | 5 to 10 mph S | 46% |
| Thursday Night | 60°F | Rain Showers | 3 to 7 mph S | 82% |
| Friday | 67°F | Rain Showers | 6 mph S | 83% |
| Friday Night | 53°F | Showers And Thunderstorms | 5 mph W | 83% |
| Saturday | 64°F | Chance Rain Showers | 5 to 8 mph NW | 52% |
| Saturday Night | 42°F | Slight Chance Rain Showers | 7 mph NW | 22% |
| Sunday | 59°F | Slight Chance Rain Showers then Mostly Sunny | 6 to 9 mph NW | 22% |
| Sunday Night | 38°F | Partly Cloudy then Slight Chance Light Rain | 7 mph W | 15% |
| Monday | 57°F | Chance Light Rain | 8 to 14 mph NW | 26% |
| Monday Night | 37°F | Chance Light Rain | 9 mph W | 26% |
| Tuesday | 59°F | Slight Chance Light Rain then Mostly Sunny | 10 to 14 mph W | 19% |
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 Nov 4, 2026.