May · United States
Best time to visit Key West in May Weather, crowds & prices
Weather in Key West in May
Average temperature 28°C, 138 mm of rain, about 31 days with 6+ hours of sunshine and 76% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
7.2/10
Ranked #5 of 12 months
- Avg temp
- 28°C
- Rainfall
- 138 mm
- Humidity
- 76%
- Days with 6h+ sun
- 31
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Key West scores 7.2/10 for beach and coastal travel - an above-average month (#5 of 12). Expect around 28°C, 138 mm of rain, and roughly 31 days with 6+ hours of sunshine this month.
Conch pastel lanes at the end of Overseas Highway at their best in January-April.
May in Key West: strong conditions, 5th of 12
Days in May average 28°C (82°F) and humidity near 76% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
138 mm of rain makes this a wet month here, though with about 31 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.2/10 on the same scale — 5th of 12 months, versus 8.6/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Expect mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Key West in May?
- In May, Key West averages 28°C, 138 mm of rain, and about 31 days with 6+ hours of sunshine. Its climate-comfort score is 7.2/10.
- Is May a good time to visit Key West?
- May earns a 7.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Key West in May?
- Expect about 138 mm of rain in May. Average humidity is 76% and there are about 31 days with 6+ hours of sunshine.
Curated in Key West
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Key West, United States. Live activities and tours from GetYourGuide, matched to this destination.