Waterbury, CT Weather & Growing Conditions
Today
69°F
Mostly Sunny
Mostly sunny. High near 69, with temperatures falling to around 67 in the afternoon. East wind 3 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Mostly Sunny | 3 to 7 mph E | 0% |
| Tonight | 50°F | Mostly Cloudy | 3 mph SE | 2% |
| Sunday | 65°F | Rain | 1 to 7 mph SE | 96% |
| Sunday Night | 51°F | Rain | 3 to 9 mph E | 96% |
| Monday | 66°F | Slight Chance Light Rain then Partly Sunny | 7 to 12 mph N | 18% |
| Monday Night | 46°F | Mostly Cloudy | 3 to 8 mph NE | 5% |
| Tuesday | 61°F | Mostly Cloudy | 10 mph NE | 9% |
| Tuesday Night | 45°F | Mostly Cloudy | 7 to 13 mph NE | 7% |
| Wednesday | 63°F | Partly Sunny | 15 mph NE | 6% |
| Wednesday Night | 45°F | Mostly Cloudy then Chance Rain Showers | 13 to 16 mph NE | 25% |
| Thursday | 62°F | Chance Rain Showers | 15 to 18 mph NE | 31% |
| Thursday Night | 46°F | Chance Rain Showers | 14 to 17 mph N | 37% |
| Friday | 63°F | Chance Rain Showers | 14 to 17 mph N | 34% |
| Friday Night | 47°F | Chance Rain Showers | 14 to 17 mph N | 34% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Waterbury, CT
Last spring frost
Apr 26
First fall frost
Oct 16
Growing season
175 days
Hardiness zone
6b
Explore more for Waterbury, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Meriden Markham Muni Ap, Ct (11.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.