May Weather in Key West

Last updated: March 2, 2024

The weather in Key West, United States, during May is characterized by an average temperature of 26°C (79°F). Highs can soar to 28°C (83°F), while lows may dip to 23°C (74°F). Typically, the humidity level in Key West throughout May hovers around 71%.

23°C (74°F)

Minimum temperature

26°C (79°F)

Average temperature

28°C (83°F)

Maximum temperature

71%

Humidity

Precipitation and Sunshine hours

In May, Key West averages 139 mm (5.5 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 13 hours 20 minutes of daylight, with the sun shining for approximately 10 hours 49 minutes each day. Additionally, there is a 58% probability of sunny days during this period.

139 mm (5.5 inches)

Precipitation

11 rainy days

Rainy days

10 hours 49 minutes

Sunshine hours

58%

Chance of sun

UV Index

In May, the UV Index in Key West reaches a maximum of 12, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 1 3 5 8 11 12 12 10 7 4 2 1
Exposure Low Moderate VeryHigh Extreme VeryHigh High Moderate Low
Time to burn 45 min 30 min 15 min 10 min 15 min 25 min 30 min 45 min

Compare Key West's Climate with Cities Worldwide