Key West, FL Weather
Key West hourly forecast: next 24 hours
Today's high of 87°F (30°C) is right in line with the typical July high of 85°F (30°C).
Current conditions in detail
Key West weather tomorrow (Saturday, July 18)
Tomorrow in Key West looks sunny, with a high of 85° and an overnight low of 83°. Precipitation chance is modest at 36%. Winds top out near 14 mph, and the UV index reaches 11 (extreme).
Key West 14-day forecast
About the weather in Key West
Weather in Key West is shaped by its tropical wet-and-dry climate - expect year-round warmth split between a rainy season and a pronounced dry season. August afternoons typically reach 86°F (30°C), while January highs hover near 73°F (23°C). Annual precipitation averages 41.4 inches (1052 mm) over about 136 rainy days.
Key West weather: quick facts
- Hottest month: August - highs near 86°F (30°C)
- Coldest month: January - highs near 73°F (23°C)
- Record high: 89°F (32°C) · Record low: 54°F (12°C) (2015–2024)
- Wettest month: September (19 rainy days) · Sunniest: July (12.2 h sun/day)
- Climate type: tropical wet-and-dry - year-round warmth split between a rainy season and a pronounced dry season
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 86°F (30°C) and overnight lows stay near 82°F (28°C). The coolest month is January, with typical highs of 73°F (23°C) and lows around 69°F (20°C). Based on 2015–2024 weather data, temperatures have reached as high as 89°F (32°C) and dropped as low as 54°F (12°C).
Rain, sun and snow
September is usually the wettest month. It brings about 6.6 inches (168 mm) of rain over 19 days, while February is the driest. July brings the most sunshine, averaging 12.2 hours of sun a day.
Season by season
March through May
March through May in Key West is mild and warm, with daytime highs averaging 78°F (26°C) and nights around 75°F (24°C); expect showers on roughly 22 days across the season.
June through August
June through August in Key West brings hot afternoons, with daytime highs averaging 85°F (29°C) and nights around 81°F (27°C); expect showers on roughly 49 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
September through November
September through November in Key West is hot, with daytime highs averaging 82°F (28°C) and nights around 78°F (26°C); expect showers on roughly 44 days across the season.
December through February
December through February in Key West brings comfortable warmth, with daytime highs averaging 74°F (23°C) and nights around 70°F (21°C); expect showers on roughly 21 days across the season.
Average temperatures in Key West by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 73° | 69° | 8 | 1.9 in | 9.4 h/day | 78% |
| February | 74° | 70° | 6 | 1.4 in | 10.3 h/day | 79% |
| March | 76° | 73° | 4 | 1.5 in | 11.0 h/day | 76% |
| April | 78° | 75° | 6 | 1.6 in | 12.1 h/day | 76% |
| May | 81° | 78° | 11 | 3.6 in | 12.1 h/day | 76% |
| June | 83° | 80° | 16 | 5.5 in | 11.3 h/day | 79% |
| July | 85° | 82° | 15 | 3.6 in | 12.2 h/day | 77% |
| August | 86° | 82° | 18 | 5.1 in | 11.5 h/day | 77% |
| September | 85° | 81° | 19 | 6.6 in | 10.5 h/day | 78% |
| October | 82° | 79° | 16 | 5.0 in | 10.0 h/day | 77% |
| November | 79° | 76° | 8 | 3.0 in | 9.7 h/day | 77% |
| December | 75° | 72° | 7 | 2.6 in | 9.3 h/day | 80% |