Town in Florida, United States
Key West weather by month and the best time to visit
When to go to Key West
Dec–Apr is dry, warm and busiest, with peak prices. Jun–Nov is hot and humid with hurricane risk; Fantasy Fest in late October draws big crowds.
Key West weather by month
Average daily high, rainfall and conditions.
- Jan23°33 mm
- Feb23°34 mm
- Mar24°26 mm
- Apr26°44 mm
- May27°96 mm
- Jun29°157 mm
- Jul30°127 mm
- Aug30°156 mm
- Sep29°177 mm
- Oct28°116 mm
- Nov26°49 mm
- Dec24°39 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 23°C73°F | 21°C70°F | 33 mm | 78% | Pleasant |
| February | 23°C74°F | 22°C71°F | 34 mm | 80% | Pleasant |
| March | 24°C75°F | 23°C73°F | 26 mm | 77% | Pleasant |
| April | 26°C78°F | 24°C76°F | 44 mm | 76% | Pleasant |
| May | 27°C81°F | 26°C79°F | 96 mm | 76% | Pleasant |
| June | 29°C84°F | 28°C82°F | 157 mm | 78% | Pleasant |
| July | 30°C85°F | 29°C84°F | 127 mm | 75% | Pleasant |
| August | 30°C86°F | 29°C84°F | 156 mm | 75% | Pleasant |
| September | 29°C85°F | 28°C83°F | 177 mm | 77% | Rainy |
| October | 28°C83°F | 27°C81°F | 116 mm | 77% | Pleasant |
| November | 26°C78°F | 24°C76°F | 49 mm | 76% | Pleasant |
| December | 24°C76°F | 23°C73°F | 39 mm | 79% | Pleasant |
Best months across United States
| Place | Best months | Warmest month |
|---|---|---|
| New York City | Apr–Jun, Sep–Oct | Jul (26°C) |
| Las Vegas | Mar–May, Oct–Nov | Jul (42°C) |
| Los Angeles | Mar–May, Sep–Nov | Aug (32°C) |
| Orlando | Feb–Apr, Nov | May (31°C) |
| Miami | Nov–Apr | Aug (30°C) |
| San Francisco | Apr–May, Sep–Oct | Sep (24°C) |
| Honolulu | Apr–Jun, Sep–Oct | Sep (28°C) |
| Washington, D.C. | Mar–May, Sep–Oct | Jul (31°C) |
| Chicago | May–Jun, Sep–Oct | Jul (25°C) |
| Boston | May–Jun, Sep–Oct | Jul (28°C) |
| New Orleans | Feb–Apr, Oct–Nov | Jul (30°C) |
| San Diego | Apr–May, Sep–Nov | Aug (32°C) |
| Seattle | Jun–Sep | Aug (24°C) |
| Maui | Apr–May, Sep–Oct | Sep (22°C) |
| Nashville | Apr–May, Sep–Oct | Aug (32°C) |
| Austin | Mar–May, Oct–Nov | Aug (36°C) |
| Miami Beach | Nov–Apr | Aug (30°C) |
| Key West | Dec–Apr | Aug (30°C) |
| Denver | May–Jun, Sep–Oct | Jul (33°C) |
| Philadelphia | Apr–May, Sep–Oct | Jul (30°C) |
| Portland | Jun–Sep | Aug (29°C) |
| Atlanta | Mar–May, Oct–Nov | Jul (32°C) |
| San Antonio | Mar–May, Oct–Nov | Aug (36°C) |
| Charleston | Mar–May, Oct–Nov | Jul (32°C) |
| Savannah | Mar–May, Oct–Nov | Jul (33°C) |
| Fort Lauderdale | Dec–Apr | Aug (30°C) |
| Kauai | Apr–Jun, Sep–Oct | Sep (27°C) |
| Big Island | Apr–Jun, Sep–Oct | Aug (26°C) |
| Sedona | Mar–May, Sep–Nov | Jul (35°C) |
| Scottsdale | Feb–Apr, Oct–Nov | Jul (42°C) |
Quick answers
What is the best month to visit Key West?
Dec–Apr. Dec–Apr is dry, warm and busiest, with peak prices. Jun–Nov is hot and humid with hurricane risk; Fantasy Fest in late October draws big crowds.
When is the rainy season in Key West?
Rain peaks in September with about 177 mm. Months with 150 mm or more: Jun, Aug–Sep.
What is the hottest month in Key West?
August, with average highs of 30°C (86°F).
How cold does Key West get?
The coolest nights are in January, averaging 21°C (70°F).
More about Key West
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Sources
- NASA POWER climatology (2001–2020)
- City of Key West
- Florida Keys & Key West tourism
- Key West International Airport
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.