Derby, CT
Climate overview — based on NOAA 1991-2020 normals from ANSONIA 1 NE, CT US.
Year-round temperatures (°F)
Climate summary
Derby has an annual average temperature of 50.2°F with about 52 inches of precipitation per year. The warmest month is July (average high 82.0°F), and the coldest is January (average low 18.4°F). October is typically the wettest month (5.00 in) and February the driest (3.62 in).
Best time to visit Derby
Full guide →Climate change signal
All-time records →198 of 366 (54.1%) of Derby'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.
| 1960s | 0 | |
| 1970s | 0 | |
| 1980s | 0 | |
| 1990s | 0 | |
| 2000s | 0 | |
| 2010s | 357 | |
| 2020s | 9 |
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 | 36.0°F | 18.4°F | 27.2°F | 3.95 in | — | 9 |
| February | 38.1°F | 18.9°F | 28.5°F | 3.62 in | — | 7 |
| March | 46.8°F | 27.4°F | 37.1°F | 4.72 in | — | 9 |
| April | 58.2°F | 37.5°F | 47.9°F | 4.72 in | — | 10 |
| May | 69.0°F | 47.2°F | 58.1°F | 4.04 in | — | 11 |
| June | 77.3°F | 57.9°F | 67.6°F | 3.93 in | — | 10 |
| July | 82.0°F | 63.1°F | 72.6°F | 4.30 in | — | 9 |
| August | 82.0°F | 62.1°F | 72.1°F | 4.56 in | — | 8 |
| September | 75.0°F | 53.6°F | 64.3°F | 4.38 in | — | 8 |
| October | 63.3°F | 41.2°F | 52.3°F | 5.00 in | — | 8 |
| November | 51.6°F | 32.0°F | 41.8°F | 4.24 in | — | 8 |
| December | 41.2°F | 23.3°F | 32.3°F | 4.57 in | — | 9 |
Climate twins of Derby
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).