Norwalk, CT
Climate overview — based on NOAA 1991-2020 normals from STAMFORD 5 N, CT US.
Year-round temperatures (°F)
Climate summary
Norwalk has an annual average temperature of 52.6°F with about 51.6 inches of precipitation per year and 34 inches of snow. The warmest month is July (average high 84.8°F), and the coldest is January (average low 22.2°F). September is typically the wettest month (5.21 in) and February the driest (3.14 in). Snow typically falls from November through April.
Best time to visit Norwalk
Full guide →Climate change signal
All-time records →40 of 366 (10.9%) of Norwalk's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1950s | 17 | |
| 1960s | 50 | |
| 1970s | 49 | |
| 1980s | 55 | |
| 1990s | 88 | |
| 2000s | 51 | |
| 2010s | 48 | |
| 2020s | 8 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 38.0°F | 22.2°F | 30.1°F | 4.26 in | 9.1 in | 11 |
| February | 41.4°F | 23.1°F | 32.2°F | 3.14 in | 11.9 in | 8 |
| March | 49.1°F | 30.4°F | 39.8°F | 4.73 in | 5.9 in | 10 |
| April | 62.0°F | 40.3°F | 51.1°F | 4.44 in | 0.5 in | 12 |
| May | 72.3°F | 50.0°F | 61.1°F | 4.12 in | — | 12 |
| June | 79.8°F | 58.5°F | 69.2°F | 4.91 in | — | 12 |
| July | 84.8°F | 64.4°F | 74.6°F | 3.77 in | — | 9 |
| August | 82.9°F | 63.1°F | 73.0°F | 3.81 in | — | 9 |
| September | 75.7°F | 56.2°F | 66.0°F | 5.21 in | — | 9 |
| October | 64.4°F | 44.6°F | 54.5°F | 4.59 in | — | 10 |
| November | 53.1°F | 35.1°F | 44.1°F | 4.19 in | 0.8 in | 10 |
| December | 42.7°F | 27.3°F | 35.0°F | 4.44 in | 5.8 in | 11 |
Climate twins of Norwalk
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).