United States · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Key West are January, February and December, when daytime temperatures are agreeable and rainfall is relatively low.
Key West sees its warmest weather in August, when daytime highs average around 33°C, and its coolest in January (around 24°C).
Annual precipitation totals roughly 1027mm — September is typically the wettest month (~184mm) and March the driest (~39mm).
A distinctly wetter period runs from August to October — worth planning around if you prefer dry days.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 60 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 24° / 19°C | 47mm | 🌟 Great |
| February | 25° / 20°C | 39mm | 🌟 Great |
| March | 26° / 21°C | 39mm | 🌟 Great |
| April | 28° / 23°C | 53mm | 👍 Good |
| May | 30° / 25°C | 79mm | 👍 Good |
| June | 32° / 26°C | 107mm | 🤔 Fair |
| July | 32° / 27°C | 92mm | 🤔 Fair |
| August | 33° / 27°C | 136mm | 🤔 Fair |
| September | 32° / 26°C | 184mm | ⚠️ Challenging |
| October | 30° / 25°C | 144mm | 🤔 Fair |
| November | 27° / 22°C | 52mm | 🌟 Great |
| December | 25° / 20°C | 55mm | 🌟 Great |
January in Key West is pleasantly warm, with average daytime highs around 24°C (76°F) and nighttime lows near 19°C (65°F). Expect roughly 47mm of precipitation, with little rainfall.
🎒 What to pack — light layers · comfortable walking shoes
February in Key West is warm, with average daytime highs around 25°C (77°F) and nighttime lows near 20°C (67°F). Expect roughly 39mm of precipitation, with little rainfall.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
March in Key West is warm, with average daytime highs around 26°C (80°F) and nighttime lows near 21°C (69°F). Expect roughly 39mm of precipitation, with little rainfall.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
April in Key West is warm, with average daytime highs around 28°C (83°F) and nighttime lows near 23°C (73°F). Expect roughly 53mm of precipitation, with little rainfall.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
May in Key West is warm, with average daytime highs around 30°C (86°F) and nighttime lows near 25°C (76°F). Expect roughly 79mm of precipitation, with a moderate amount of rain.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
June in Key West is hot, with average daytime highs around 32°C (89°F) and nighttime lows near 26°C (79°F). Expect roughly 107mm of precipitation, with a moderate amount of rain.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle
July in Key West is hot, with average daytime highs around 32°C (90°F) and nighttime lows near 27°C (81°F). Expect roughly 92mm of precipitation, with a moderate amount of rain.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle
August in Key West is hot, with average daytime highs around 33°C (91°F) and nighttime lows near 27°C (80°F). Expect roughly 136mm of precipitation, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
September in Key West is hot, with average daytime highs around 32°C (89°F) and nighttime lows near 26°C (79°F). Expect roughly 184mm of precipitation, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
October in Key West is warm, with average daytime highs around 30°C (86°F) and nighttime lows near 25°C (77°F). Expect roughly 144mm of precipitation, and this is one of the wetter months.
🎒 What to pack — light summer clothing · sunscreen and sunglasses · compact umbrella or rain jacket
November in Key West is warm, with average daytime highs around 27°C (81°F) and nighttime lows near 22°C (72°F). Expect roughly 52mm of precipitation, with little rainfall.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
December in Key West is warm, with average daytime highs around 25°C (78°F) and nighttime lows near 20°C (68°F). Expect roughly 55mm of precipitation, with little rainfall.
🎒 What to pack — light summer clothing · sunscreen and sunglasses