Watertown, CT Weather & Growing Conditions
Overnight
48°F
Mostly Clear
Mostly clear, with a low around 48. Southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Mostly Clear | 3 mph SW | 2% |
| Wednesday | 70°F | Sunny | 2 to 9 mph SW | 2% |
| Wednesday Night | 54°F | Mostly Cloudy | 6 mph S | 2% |
| Thursday | 68°F | Chance Light Rain | 6 to 10 mph S | 43% |
| Thursday Night | 57°F | Light Rain | 2 to 7 mph SW | 76% |
| Friday | 67°F | Light Rain | 3 mph S | 81% |
| Friday Night | 51°F | Light Rain | 2 mph N | 81% |
| Saturday | 62°F | Chance Light Rain | 3 to 7 mph NW | 30% |
| Saturday Night | 42°F | Chance Light Rain | 6 to 9 mph NW | 27% |
| Sunday | 56°F | Slight Chance Light Rain then Mostly Sunny | 5 to 9 mph NW | 21% |
| Sunday Night | 37°F | Partly Cloudy | 5 to 8 mph W | 4% |
| Monday | 54°F | Sunny | 8 to 13 mph W | 11% |
| Monday Night | 35°F | Partly Cloudy | 5 to 8 mph W | 11% |
| Tuesday | 57°F | Mostly Sunny | 7 to 12 mph W | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Watertown, CT
Last spring frost
Apr 25
First fall frost
Oct 18
Growing season
172 days
Hardiness zone
6b
Explore more for Watertown, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Burlington, Ct (15.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.