Weather in Key West: May
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Average day temperature: | 81.7°F |
| Average night temperature: | 78.7°F | |
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Sea water temperature: | 82.0°F |
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Number of sunny days: | 16 days |
| Day length: | 13.1 - 13.6 hours | |
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Number of rainy days: | 5 days |
| Precipitation totals: | 3.6 in. | |
| more information | ||
14 days
forecast
forecast
| Key West |
sea water
temperature
temperature
| Key West |
Air temperature in May, °F
Show year:
2025
2024
2023
The highest day temperature during May of 2025 was 85°F. At the same time the lowest night temperature was 76°F. Daily and nightly averages during May were 81.8°F and 78.7°F.
Sea water temperature in Key West in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 83.5°F. The highest and lowest sea temperatures during the month were 86.9°F and 79.2°F.
Sunny, partly cloudy and cloudy days
Mostly all days in May are sunny but cloudy days are also possible.
Precipitation total in May, in.
Precipitation total value in Key West in May is 4.0 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 11.4 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 8.9.
Best time for vacation in Key West
Key West on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Key West
Local time: 05:17
December 14, sunday
0600
73°F
W
22 mph
22 mph
0900
73°F
W
16 mph
16 mph
1200
72°F
W
7 mph
7 mph
1500
72°F
SW
3 mph
3 mph
1800
72°F
S
7 mph
7 mph
2100
72°F
S
11 mph
11 mph
December 15, monday
0000
72°F
S
17 mph
17 mph
0300
72°F
S
19 mph
19 mph
