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%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
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.
Precipitation
Rainy days
Sunshine hours
Chance of sun
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.
| 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 | |||||