Connecticut climate: Statewide normals, its places and each month, NOAA 1991-2020
Connecticut's statewide normal is 49.9°F a year with 48.7 inches of precipitation (NOAA nClimDiv, 1991-2020); it has warmed 2.9°F per century since 1895, and 2012 was its warmest year.
- Statewide normal temperature
- 49.9°Fyear, 1991-2020
- Statewide normal precipitation
- 48.7 inyear, 1991-2020
- Last five years against normal
- +1.5°F2021-2025 mean 51.4°F
- Places with normals
- 2313 Census places, 10 other stations
What is Connecticut's weather like each month?
Statewide, July is the warmest month and January the coldest. Each month has its own page with the warmest and coolest places that month:
- Jan36°18°
- Feb39°20°
- Mar47°27°
- Apr59°37°
- May69°47°
- Jun78°56°
- Jul83°62°
- Aug81°60°
- Sep74°53°
- Oct63°42°
- Nov51°33°
- Dec41°24°
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 36°F | 18°F | 27.2°F | 3.57 |
| February | 39°F | 20°F | 29.4°F | 3.06 |
| March | 47°F | 27°F | 36.8°F | 4.17 |
| April | 59°F | 37°F | 47.7°F | 4.16 |
| May | 69°F | 47°F | 58.0°F | 3.77 |
| June | 78°F | 56°F | 66.8°F | 4.39 |
| July | 83°F | 62°F | 72.3°F | 4.04 |
| August | 81°F | 60°F | 70.6°F | 4.17 |
| September | 74°F | 53°F | 63.4°F | 4.41 |
| October | 63°F | 42°F | 52.1°F | 4.77 |
| November | 51°F | 33°F | 41.8°F | 3.87 |
| December | 41°F | 24°F | 32.7°F | 4.37 |
Source: NOAA NCEI nClimDiv statewide series (Climate at a Glance); data files. Statewide values are area-weighted from a 5 km grid of station data, so they differ from the simple average of a state's stations.
Has Connecticut been warmer than normal?
5 of the 5 complete years since 2021 ran warmer than the 1991-2020 statewide normal of 49.9°F. The record since 1895 rises at a fitted 2.9°F per century; the warmest year was 2012 (52.5°F).
| Year | Mean | Against normal |
|---|---|---|
| 2021 | 51.4°F | +1.5°F |
| 2022 | 51.0°F | +1.1°F |
| 2023 | 52.2°F | +2.3°F |
| 2024 | 52.1°F | +2.2°F |
| 2025 | 50.3°F | +0.4°F |
Source: NOAA NCEI nClimDiv statewide annual series.
Where is it warmest, wettest and snowiest in Connecticut?
Among the places PlainClimate covers, Bridgeport has the warmest year (53.4°F) and Norfolk the coolest (45.9°F); Bakersville is the wettest (54.3 in) and Groton the driest (39.3 in), and Norfolk gets the most snow (75 in).
| Place | Year | July high | January low | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|
| Bridgeport | 53.4°F | 83°F | 24°F | 44.1 | 34 | April 5 |
| Stamford | 52.6°F | 85°F | 22°F | 51.6 | 34 | April 17 |
| New Haven | 52.0°F | 82°F | 23°F | 41.8 | – | April 17 |
| Hartford | 51.0°F | 85°F | 19°F | 47.0 | 52 | April 21 |
| Danbury | 49.6°F | 82°F | 18°F | 48.0 | – | May 1 |
| Meriden | 50.7°F | 84°F | 19°F | 44.9 | – | April 26 |
| Norwich | 51.8°F | 84°F | 21°F | 52.2 | 28 | April 14 |
| Ansonia | 50.1°F | 82°F | 18°F | 52.0 | – | April 25 |
| Willimantic | 49.9°F | 83°F | 18°F | 43.3 | – | April 28 |
| Storrs | 49.6°F | 81°F | 19°F | 49.3 | 39 | April 19 |
| Groton | 51.4°F | 80°F | 23°F | 39.3 | – | April 16 |
| Norfolk | 45.9°F | 78°F | 14°F | 52.9 | 75 | May 3 |
| Falls Village | 48.4°F | 85°F | 14°F | 46.9 | – | May 11 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
What are Connecticut's all-time weather records?
The official state records, reviewed by NOAA's State Climate Extremes Committee: from 106°F to −32°F.
| Record | Value | Where | When |
|---|---|---|---|
| Highest temperature | 106°F | Danbury (tied 2 times; the latest shown) | July 15, 1995 |
| Lowest temperature | −32°F | Coventry (tied 2 times; the latest shown) | January 22, 1961 |
| Most precipitation in 24 hours | 12.77 in | Burlington | August 19, 1955 |
| Most snow in 24 hours | 36 in | Ansonia 1NE | February 8, 2013 |
| Deepest snow on the ground | 55 in | Norfolk 2SW | February 5, 1961 |
Source: NOAA NCEI State Climate Extremes Committee records.
Which large cities in Connecticut have no climate record of their own?
These 8 cities of 50,000 or more have no NOAA record with 1991-2020 normals under their own name; each page compares the nearest records, with their distance and elevation.
- Waterbury115,908 people
- Norwalk93,661 people
- New Britain75,871 people
- West Hartford63,809 people
- Bristol62,195 people
- West Haven55,379 people
- Milford51,004 people
- East Hartford50,798 people
Which other NOAA stations in Connecticut keep normals?
10 stations in Connecticut that are not a town's own record keep 1991-2020 normals too: reservoirs and dams, parks and forests, research farms, remote sites and the second stations of towns (those are shown on the town's page). Each with its normal yearly mean:
Source: NOAA NCEI 1991-2020 normals for each station.
Next
- Frost dates in ConnecticutLast spring and first autumn frost at every station
- Every stateCompare the statewide normals
- Bridgeport53.4°F a year, 44.1 in of precipitation
- Norfolk45.9°F a year, 52.9 in of precipitation
- Bakersville47.3°F a year, 54.3 in of precipitation
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