Key West, FL
Climate overview — based on NOAA 1991-2020 normals from KEY W WFO, FL US.
Year-round temperatures (°F)
Climate summary
Key West has an annual average temperature of 77.4°F with about 46.4 inches of precipitation per year. The warmest month is July (average high 89.8°F), and the coldest is January (average low 62.9°F). September is typically the wettest month (8.24 in) and March the driest (1.41 in).
Best time to visit Key West
Full guide →Climate change signal
All-time records →313 of 366 (85.5%) of Key West'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.
| 2010s | 191 | |
| 2020s | 175 |
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 | 74.7°F | 62.9°F | 68.8°F | 2.01 in | — | 8 |
| February | 76.5°F | 64.3°F | 70.4°F | 1.96 in | — | 6 |
| March | 78.8°F | 66.8°F | 72.8°F | 1.41 in | — | 6 |
| April | 82.7°F | 70.9°F | 76.8°F | 2.17 in | — | 5 |
| May | 85.6°F | 74.0°F | 79.8°F | 3.71 in | — | 8 |
| June | 88.0°F | 76.8°F | 82.4°F | 4.81 in | — | 10 |
| July | 89.8°F | 77.8°F | 83.8°F | 4.48 in | — | 13 |
| August | 89.7°F | 78.5°F | 84.1°F | 6.13 in | — | 14 |
| September | 88.3°F | 77.0°F | 82.7°F | 8.24 in | — | 16 |
| October | 85.2°F | 74.6°F | 79.9°F | 6.01 in | — | 12 |
| November | 80.6°F | 69.8°F | 75.2°F | 3.28 in | — | 7 |
| December | 76.9°F | 66.0°F | 71.5°F | 2.22 in | — | 7 |
Climate twins of Key West
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).