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Best time to visit · Florida, United States
November – April are the best time to visit Key West on the climate data: April scores 93/100, with highs around 78°F (26°C) and 1.7 in (44 mm) of rain. May is a good shoulder-season month. The toughest months are June and August & September, mainly because of rain.
These averages also cover Old Town & Duval Street.
Highs run from 73°F to 86°F across the year, and the yearly total is about 41.5 in (1054 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 73°F23°C | 74°F23°C | 75°F24°C | 78°F26°C | 81°F27°C | 84°F29°C | 85°F30°C | 86°F30°C | 85°F29°C | 83°F28°C | 78°F26°C | 76°F24°C |
| Avg low | 70°F21°C | 71°F22°C | 73°F23°C | 76°F24°C | 79°F26°C | 82°F28°C | 84°F29°C | 84°F29°C | 83°F29°C | 81°F27°C | 76°F24°C | 73°F23°C |
| Rain | 1.3 in33 mm | 1.3 in34 mm | 1.0 in26 mm | 1.7 in44 mm | 3.8 in96 mm | 6.2 in157 mm | 5.0 in127 mm | 6.1 in156 mm | 7.0 in177 mm | 4.6 in116 mm | 1.9 in49 mm | 1.5 in39 mm |
| Humidity | 78% | 80% | 77% | 76% | 76% | 78% | 75% | 75% | 77% | 77% | 76% | 79% |
| Cloud | 51% | 42% | 39% | 37% | 43% | 62% | 59% | 58% | 62% | 53% | 47% | 49% |
| Comfort | 87 | 89 | 92 | 93 | 84 | 62 | 66 | 61 | 58 | 74 | 89 | 87 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 0 m (0 ft), close to Key West's own ~1 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The cold peaks here: highs of 73–76°F (23–24°C), and nights reach 70°F (21°C). It's the driest season, with only about 4.2 in (106 mm) of rain, 10% of the year's total. December – February feel humid, with humidity near 79%. December – February are among the best-scoring months (season average 88/100).
Temperatures climb through the season, from 75°F highs in March to 81°F by May. About 6.5 in (166 mm) of rain falls across these months, 16% of the year's total. March – May feel humid, with humidity near 77%. Comfort peaks here: March & April rank with the year's best, and the season averages 90/100.
Peak warmth: highs of 84–86°F (29–30°C). It's the wettest season, with about 17.3 in (440 mm) of rain, 42% of the year's total. June – August feel humid, with humidity near 78%. Comfort scores bottom out in June and August; the season averages 63/100.
Temperatures slide from 85°F highs in September to 78°F by November. About 13.5 in (342 mm) of rain falls across these months, 32% of the year's total. September – November feel humid, with humidity near 77%. Comfort peaks here: November ranks with the year's best, and the season averages 74/100.
By comfort score: 7 Great, 4 Good and 1 Fair. Great months: November – May. Tap a month for its own guide.
November – April are the best time to visit Key West on the climate data: April scores 93/100, with highs around 78°F (26°C) and 1.7 in (44 mm) of rain. May is a good shoulder-season month. The toughest months are June and August & September, mainly because of rain.
September is the wettest month, averaging about 7.0 in (177 mm) of rain. March is the driest, with about 1.0 in (26 mm). The yearly total is around 41.5 in (1054 mm).
January is the coldest, with average lows of 70°F (21°C) and highs of 73°F (23°C). The warmest is August, with average highs of 86°F (30°C).
Yes: in June – August humidity averages 78% with warm temperatures, so it feels muggy. Summer highs peak around 86°F (30°C).
The wettest three-month stretch is July – September, with about 18.1 in (460 mm) of rain combined. The driest stretch is January – March, with about 3.7 in (93 mm).
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