Last updated: March 2, 2024
The weather in Galveston, United States, during May is characterized by an average temperature of 25°C (77°F). Highs can soar to 28°C (82°F), while lows may dip to 20°C (68°F). Typically, the humidity level in Galveston throughout May hovers around 79%.
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Average temperature
Maximum temperature
Humidity
In May, Galveston averages 164 mm (6.5 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 13 hours 37 minutes of daylight, with the sun shining for approximately 10 hours 15 minutes each day. Additionally, there is a 35% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In May, the UV Index in Galveston reaches a maximum of 11, 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 | 6 | 8 | 11 | 12 | 11 | 9 | 6 | 4 | 2 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | High | Moderate | Low | ||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 25 min | 30 min | 45 min | ||||