Waterbury, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Waterbury, a city in New Haven County, Connecticut.
Today
70°F
Partly Sunny
Partly sunny. High near 70, with temperatures falling to around 62 in the afternoon. Southwest wind 5 to 8 mph.
7-day forecast for Waterbury
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Partly Sunny | 5 to 8 mph SW | 0% |
| Tonight | 47°F | Mostly Clear | 5 mph SW | 0% |
| Wednesday | 74°F | Mostly Sunny | 2 to 9 mph SW | 0% |
| Wednesday Night | 52°F | Partly Cloudy | 5 mph SW | 0% |
| Thursday | 70°F | Chance Rain Showers | 3 to 10 mph SW | 30% |
| Thursday Night | 58°F | Showers And Thunderstorms Likely | 2 to 6 mph SW | 56% |
| Friday | 69°F | Showers And Thunderstorms | 1 to 6 mph S | 77% |
| Friday Night | 53°F | Showers And Thunderstorms then Light Rain Likely | 3 mph W | 77% |
| Saturday | 65°F | Light Rain Likely | 3 to 7 mph N | 60% |
| Saturday Night | 43°F | Chance Light Rain | 5 mph NW | 33% |
| Sunday | 61°F | Slight Chance Light Rain then Mostly Sunny | 3 to 7 mph NW | 15% |
| Sunday Night | 40°F | Partly Cloudy then Slight Chance Light Rain | 0 to 3 mph NW | 18% |
| Monday | 58°F | Chance Light Rain | 3 to 10 mph NW | 32% |
| Monday Night | 39°F | Chance Light Rain | 5 to 9 mph NW | 32% |
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 Nov 3, 2026.