Weather in Key West in May 2026
Average weather
Average temperature in Key West in May
Going from a maximum of +88°F during the day to a minimum of +70°F during the night, the temperature in May averages around +86°F.
The average maximum temperature goes up 10% by the end of the month, compared with the beginning of the month, from +84°F to +86°F.
Is Key West warm or cold in May?
Key West is typically warm in May.
Maximum temperatures go up compared to the previous month from +79°F to +82°F. The minimum temperature also goes up from +73°F to +77°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how May is compared to other months in Key West:
Climate in Key West in May
| April | May | June | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +79°F | +82°F | +84°F | ||||
| Min. temperature | ||||||
| +57°F | +64°F | +72°F | ||||
| Max. temperature | ||||||
| +90°F | +91°F | +93°F | ||||
| Rainfall | ||||||
| 46 mm | 84 mm | 129 mm | ||||
| Wind | ||||||
| 5 m/s | 4 m/s | 3 m/s | ||||
| Humidity | ||||||
| 73% | 74% | 76% | ||||
| Air pressure | ||||||
| 1015 HPa | 1014 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 13 | 10 | 5 | ||||
| Cloudy days | ||||||
| 7 | 6 | 4 | ||||
| Rainy days | ||||||
| 10 | 14 | 17 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
May weather is still as good as in April. It’s getting warmer as May arrives. The average maximum temperature goes up from +79°F to +82°F during the day. Prepare for more rain. Average rainfall goes from 46 mm to 84 mm. Humidity rises from 73% to 74%. Winds are calmer in comparison to April, going down from 5 m/s to 4 m/s on average. The days becoming less sunny, going from 13 sunny days in April to 10 in May.
Next month (June) brings a further decline in the weather.
Wind
The average wind speed is 3 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Key West is gradually increasing during May, going from 4 m/s to 4 m/s over the course of the month.
Rain
How was the weather last May in Key West?
Climate Change Over the Years
The climate in Key West in May has not changed that much over the last 43 years.
The average temperature was the lowest in 1981 (+77°F) and the highest in 2019 (+85°F). The driest year was 2009 with only 624 mm of rainfall, and the wettest year was 2024 with 1925 mm.
FAQ
Is May a good time to visit Key West?
Can you sunbathe in Key West in May?
Is Key West rainy in May?
Is it sunny in Key West in May?
Other cities in USA
Monthly weather in Key West
Source of the data
For this page, we’ve looked at the typical weather in Key West, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
