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Key West in May: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Key West in May is climatically well suited to beach holidays, family holidays and city breaks. The average daily high is around 27 °C, and the sea is about 27 °C. With about 14 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
74/100 · #7
Warmth
#6
Dryness
#7
Sun
#1
Sea warmth
#6
Published best categories: none
Key West · MayPhoto: Ebyabe · CC BY-SA 3.0Climate facts
- Average high
- 27 °C
- Average low
- 26 °C
- Sea
- 27 °C
- Rainy days (est.)
- 14 rainy days (est.)
- Sun (est.)
- 9 h/day
- Humidity
- 76 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| April | 25 | 24 | 8 | 59 | 8.2 | 77 | 5.0 | 25 | 89 |
| May (selected) | 27 | 26 | 14 | 100 | 8.5 | 76 | 4.4 | 27 | 74 |
| June | 29 | 28 | 23 | 202 | 7.9 | 78 | 3.9 | 29 | 59 |
How do the previous and next months compare?
Baseline: May (74/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| April | +15 | -1.7 °C | -1.9 °C | -6.2 | -41.5 mm | -0.3 h | +0.2 % | +0.6 m/s | -1.8 °C |
| June | -15 | +1.6 °C | +1.6 °C | +9.1 | +101.6 mm | -0.6 h | +1.6 % | -0.5 m/s | +1.7 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Key West in May?
The average daily high is around 27 °C, with an average daily low of about 26 °C.
Can you swim in Key West in May?
The sea is about 27 °C (warm).
Does it rain a lot in Key West in May?
The curated estimate is about 14 rainy days per month, not a directly measured long-term average. Total precipitation averages around 100 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Key West?
By the climate score, February, March, April and December are the strongest months for Key West. For a beach trip: February, March, April and November. May is not among them.