New London, CT
Climate overview — based on NOAA 1991-2020 normals from GROTON NEW LONDON AP, CT US.
Year-round temperatures (°F)
Climate summary
New London has an annual average temperature of 51.4°F with about 39.3 inches of precipitation per year. The warmest month is July (average high 79.8°F), and the coldest is January (average low 23.3°F). September is typically the wettest month (3.83 in) and February the driest (2.20 in).
Best time to visit New London
Full guide →Climate change signal
All-time records →176 of 366 (48.1%) of New London'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.
| 1990s | 0 | |
| 2000s | 114 | |
| 2010s | 163 | |
| 2020s | 89 |
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 | 38.3°F | 23.3°F | 30.8°F | 2.68 in | — | 9 |
| February | 40.2°F | 24.6°F | 32.4°F | 2.20 in | — | 8 |
| March | 46.6°F | 30.7°F | 38.6°F | 3.82 in | — | 9 |
| April | 56.2°F | 39.1°F | 47.6°F | 3.58 in | — | 11 |
| May | 64.8°F | 48.8°F | 56.8°F | 3.31 in | — | 12 |
| June | 73.8°F | 58.2°F | 66.0°F | 3.30 in | — | 11 |
| July | 79.8°F | 64.8°F | 72.3°F | 3.24 in | — | 10 |
| August | 79.2°F | 63.8°F | 71.5°F | 3.32 in | — | 10 |
| September | 73.5°F | 56.9°F | 65.2°F | 3.83 in | — | 9 |
| October | 63.2°F | 45.6°F | 54.4°F | 3.66 in | — | 10 |
| November | 53.3°F | 36.8°F | 45.1°F | 3.24 in | — | 9 |
| December | 43.9°F | 29.0°F | 36.5°F | 3.13 in | — | 10 |
Climate twins of New London
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).