Waterbury, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Waterbury, a city in New Haven County, Connecticut.
Tonight
49°F
Partly Cloudy
Partly cloudy. Low around 49, with temperatures rising to around 51 overnight. North wind around 7 mph.
7-day forecast for Waterbury
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Partly Cloudy | 7 mph N | 0% |
| Saturday | 68°F | Mostly Sunny | 7 mph E | 0% |
| Saturday Night | 53°F | Mostly Cloudy | 1 to 6 mph SE | 4% |
| Sunday | 65°F | Showers And Thunderstorms | 2 to 8 mph SE | 92% |
| Sunday Night | 54°F | Showers And Thunderstorms | 0 to 10 mph N | 92% |
| Monday | 65°F | Chance Rain Showers | 7 to 12 mph N | 34% |
| Monday Night | 49°F | Slight Chance Rain Showers | 5 to 12 mph NE | 22% |
| Tuesday | 61°F | Slight Chance Rain Showers | 13 mph NE | 23% |
| Tuesday Night | 47°F | Mostly Cloudy | 10 to 15 mph NE | 9% |
| Wednesday | 61°F | Partly Sunny then Slight Chance Rain Showers | 13 to 16 mph NE | 15% |
| Wednesday Night | 47°F | Slight Chance Rain Showers | 12 to 16 mph NE | 24% |
| Thursday | 60°F | Chance Rain Showers | 13 to 16 mph NE | 31% |
| Thursday Night | 48°F | Chance Rain Showers | 10 to 16 mph NE | 35% |
| Friday | 65°F | Chance Rain Showers | 10 to 16 mph N | 33% |
Forecast source: National Weather Service (api.weather.gov) for Waterbury (41.559, -73.037). Updated through the day.
Growing snapshot for Waterbury
Last spring frost
Apr 26
First fall frost
Oct 16
Growing season
175 days
Hardiness zone
6b
More local growing data for Waterbury: nearby ZIP 06702 weather · frost dates · planting calendar · Connecticut frost dates
Nearby towns & communities
Ansonia
Branford Center
Cheshire Village
Derby
East Haven
Guilford Center
Heritage Village
Madison Center
Meriden
Milford city
Naugatuck
New Haven
North Haven
Northford
Orange
Quinnipiac University
Wallingford Center
West Haven
Woodmont
Climate data from the nearest NOAA station, Meriden Markham Muni Ap, Ct (11.7 mi from Waterbury). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.