Key West weather in May 2025

Expect 84°F daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Key West in May. Check more long-term weather averages for Key West in May before you book your next holiday to Florida in 2025/2026.

  • 84°F maximum daytime temperature in May in Key West84
    84°F max day temperature
  • 11 hours of sunshine per day
  • 8 days with some rainfall in May in Key West8
    8 days with some rainfall
  • 73°F minimum night-time temperature in May in Key West73
    73°F min night temperature
  • 13 hours of daylight per day in May in Key West13
    13 hours of daylight per day
  • High heat & humidity in May in Key WestH
    High heat & humidity
  • 4.2 inches monthly rainfall in May in Key West4.2
    4.2 inches of monthly rainfall
  • UV (maximum) index 11 (Extreme) in May in Key West11
    11 (Extreme) UV index
  • 81°F sea temperature in May in Key West81
    81°F sea temperature

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The May weather guide for Florida (Key West) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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More about Florida

How hot is it in Key West in May?

Daytime temperatures usually reach 84°F in Key West in May with high heat and humidity, falling to 73°F at night.

How sunny is it in Key West in May?

There are normally 11 hours of bright sunshine each day in Key West in May - that's 79% of daylight hours.

How warm is the sea around Key West in May?

The average sea temperature around Key West in May is 81°F.

Does it rain in Key West in May?

There are usually 8 days with some rain in Key West in May and the average monthly rainfall is 4.2 inches.

Key West May sunrise & sunset times

Browse the sunrise and sunset times for Key West in May 2025. Select a month to view Key West sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:52 18:57
Friday, 16th May 2025 05:43 19:04
Saturday, 31st May 2025 05:38 19:12

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