Our verdict
The best time to visit Key West is September-November
In summer, temperatures can reach as high as 30℃ (87℉) in the middle of the day. The coldest it usually gets in winter-time in Key West is around 17℃ (62℉).
If you want to get the most out of your time visiting Key West, or you’re just afraid of the dark, the days in July are usually the longest between sunrise and sunset. September sees the most amount of rain in a month if you’re ok with chancing getting drenched, so if you’re looking to stay dry, visit in March instead.
Find out everything you need to know about when to visit Key West below, including detailed information about the weather and tools to help you find the best prices and book your trip.
Quick links: Fast facts / Seasons / Average temperatures / Monthly climate / FAQs / Map
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Key West seasons
Before you continue, it’s important to know when the seasons are in Key West as they might be different to yours depending on where in the world you’re travelling from. Key West is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in Key West
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Key West for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
Key West climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Key West for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
Key West in January
- Average temperature: 22℃ (71℉)
- Average high temperature: 23℃ (73℉)
- Average low temperature: 20℃ (68℉)
- Average humidity: 76%
- Average sunny days: 14 days
- Average rainfall: 34mm (1") over 12 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in January, make sure you pack t-shirts and maybe a light jumper for the evenings.
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Key West in February
- Average temperature: 22℃ (72℉)
- Average high temperature: 23℃ (73℉)
- Average low temperature: 21℃ (70℉)
- Average humidity: 78%
- Average sunny days: 14 days
- Average rainfall: 28mm (1") over 11 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in February, make sure you pack t-shirts and light clothing.
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Key West in March
- Average temperature: 23℃ (73℉)
- Average high temperature: 24℃ (74℉)
- Average low temperature: 22℃ (71℉)
- Average humidity: 75%
- Average sunny days: 17 days
- Average rainfall: 17mm (1") over 12 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in March, make sure you pack t-shirts and light clothing.
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Key West in April
- Average temperature: 25℃ (77℉)
- Average high temperature: 25℃ (78℉)
- Average low temperature: 24℃ (75℉)
- Average humidity: 77%
- Average sunny days: 14 days
- Average rainfall: 39mm (2") over 13 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in April, make sure you pack t-shirts and light clothing.
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Key West in May
- Average temperature: 26℃ (80℉)
- Average high temperature: 27℃ (80℉)
- Average low temperature: 26℃ (78℉)
- Average humidity: 77%
- Average sunny days: 11 days
- Average rainfall: 89mm (4") over 17 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in May, make sure you pack t-shirts and light clothing.
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Key West in June
- Average temperature: 28℃ (83℉)
- Average high temperature: 29℃ (83℉)
- Average low temperature: 28℃ (82℉)
- Average humidity: 77%
- Average sunny days: 8 days
- Average rainfall: 77mm (3") over 19 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in June, make sure you pack t-shirts and light clothing.
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Key West in July
- Average temperature: 29℃ (84℉)
- Average high temperature: 29℃ (85℉)
- Average low temperature: 28℃ (83℉)
- Average humidity: 74%
- Average sunny days: 9 days
- Average rainfall: 84mm (3") over 20 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in July, make sure you pack t-shirts and light clothing.
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Key West in August
- Average temperature: 29℃ (85℉)
- Average high temperature: 30℃ (85℉)
- Average low temperature: 29℃ (84℉)
- Average humidity: 74%
- Average sunny days: 6 days
- Average rainfall: 110mm (4") over 23 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in August, make sure you pack t-shirts and light clothing.
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Key West in September
- Average temperature: 29℃ (83℉)
- Average high temperature: 29℃ (84℉)
- Average low temperature: 28℃ (82℉)
- Average humidity: 75%
- Average sunny days: 5 days
- Average rainfall: 130mm (5") over 23 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in September, make sure you pack t-shirts and light clothing.
Key West in October
- Average temperature: 27℃ (81℉)
- Average high temperature: 28℃ (82℉)
- Average low temperature: 27℃ (80℉)
- Average humidity: 75%
- Average sunny days: 7 days
- Average rainfall: 107mm (4") over 20 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in October, make sure you pack t-shirts and light clothing.
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Key West in November
- Average temperature: 25℃ (77℉)
- Average high temperature: 26℃ (78℉)
- Average low temperature: 24℃ (75℉)
- Average humidity: 75%
- Average sunny days: 12 days
- Average rainfall: 37mm (1") over 14 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in November, make sure you pack t-shirts and light clothing.
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Key West in December
- Average temperature: 23℃ (74℉)
- Average high temperature: 24℃ (76℉)
- Average low temperature: 22℃ (72℉)
- Average humidity: 77%
- Average sunny days: 12 days
- Average rainfall: 31mm (1") over 13 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Key West in December, make sure you pack t-shirts and light clothing.
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