New Haven County weather, town by town
37 places in New Haven County, Connecticut, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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New Haven County Weather Facts
New Haven County has 37 places on myweatherrock (27 towns, 8 census-designated places, 1 place, 1 boroughs), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 106°F at Danbury on July 15, 1995. The coldest night is -18°F at Danbury on January 27, 1994. The wettest day brought 9.55 inches of rain at Danbury on September 16, 1999. The biggest single-day snow measured 35.98 inches at Ansonia 1 Nw on February 9, 2013. Those are station measurements from NOAA's daily records, 1937 to 2026, not official state records. By area the largest place is Guilford, about 47 square miles.
About New Haven County weather
The map on the Now tab shows every New Haven County town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 37 New Haven County towns with station normals, the warmest month is July, when the day usually reaches 84°F, and the coldest is January, when the night usually falls to 21°F. May is the wettest, with rain on about 13 days. July afternoons run from about 83°F in Ansonia to 86°F in Heritage Village. January nights run from about 19°F in Beacon Falls to 24°F in Milford.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
- Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
- Warnings and alerts: the National Weather Service, passed through unchanged.
New Haven County weather records
Measured at the NOAA stations serving these towns, daily records 1937 to 2026. Station extremes, not official records.
Common questions about New Haven County weather
- What is the hottest temperature recorded at a New Haven County station?
- 106°F at Danbury on July 15, 1995, in the NOAA daily station records myweatherrock holds (1937 to 2026).
- What is the coldest temperature recorded at a New Haven County station?
- -18°F at Danbury on January 27, 1994.
- What is the most rain a New Haven County station has measured in one day?
- 9.55 inches at Danbury on September 16, 1999.
- What is the biggest one-day snowfall at a New Haven County station?
- 35.98 inches at Ansonia 1 Nw on February 9, 2013.
- How many New Haven County towns have a weather page here?
- 37: 27 towns, 8 census-designated places, 1 place, 1 boroughs. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
- Where does the New Haven County forecast come from?
- NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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