Last updated: March 2, 2024
The weather in Unalaska, United States, during May is characterized by an average temperature of 4°C (40°F). Highs can soar to 9°C (48°F), while lows may dip to -1°C (31°F). Typically, the humidity level in Unalaska throughout May hovers around 90%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In May, Unalaska averages 115 mm (4.5 inches) of rainfall, typically over the course of 22 rainy days. The month enjoys an average of 16 hours 0 minutes of daylight, with the sun shining for approximately 7 hours 51 minutes each day. Additionally, there is a 12% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In May, the UV Index in Unalaska reaches a maximum of 6, indicating a level of High exposure. The most intense UV radiation typically occurs between 14:00 and 16:00, during which unprotected skin may burn in as little as 25 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 | 1 | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 5 | 4 | 3 |
| Exposure | Low | Moderate | High | Moderate | |||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | |||||||||