Connecticut Climate Data
NOAA 30-year climate normals for all 9 counties.
NOAA NCEI 1991-2020 Climate NormalsState Avg Temp
50.4°F
Hottest County
Lower Connecticut River Valley Planning Region
52.6°F avg
Coldest County
Naugatuck Valley Planning Region
48.0°F avg
Wettest County
Naugatuck Valley Planning Region
50.4" precip
All Connecticut Counties
Capitol Planning Region
49.0°F avg
Greater Bridgeport Planning Region
51.6°F avg
Lower Connecticut River Valley Planning Region
52.6°F avg
Naugatuck Valley Planning Region
48.0°F avg
Northeastern Connecticut Planning Region
52.1°F avg
Northwest Hills Planning Region
49.4°F avg
South Central Connecticut Planning Region
52.6°F avg
Southeastern Connecticut Planning Region
50.7°F avg
Western Connecticut Planning Region
48.0°F avg
Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.