Last updated: June 24, 2025
In May, the average temperature in Bellevue, United States hovers around 16°C (61°F). However, be prepared for a range of weather, as temperatures can dip to a chilly -1°C (31°F) or soar up to a sweltering 34°C (94°F). Expect 150 mm (5.9 in) of precipitation spread over 14 days, contributing to an average humidity level of 75%.
In May in Bellevue, the average temperature is 16°C (61°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as -1°C (31°F). Therefore, travelers should prepare for a wide range of temperatures and pack accordingly.
In Bellevue in May, the total precipitation amount is 150 mm (5.9 in), occurring over a span of 14 days.
In Bellevue in May humidity is 75%. With an average temperature of 16°C (61°F), this humidity feels like a warm, muggy embrace, making traveling somewhat uncomfortable as you may find yourself constantly adjusting your clothing and seeking shade to escape the sticky air.
In Bellevue in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Bellevue.
UV Risk Categories
Weather in Bellevue varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Bellevue, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 52 mm (2.1 inches) | 84% | moderate |
| February Weather | -5°C (24°F) | 59 mm (2.3 inches) | 85% | moderate |
| March Weather | 3°C (38°F) | 69 mm (2.7 inches) | 84% | high |
| April Weather | 9°C (48°F) | 91 mm (3.6 inches) | 83% | very high |
| May Weather | 16°C (61°F) | 150 mm (5.9 inches) | 75% | very high |
| June Weather | 22°C (72°F) | 129 mm (5.1 inches) | 79% | very high |
| July Weather | 24°C (76°F) | 78 mm (3.1 inches) | 75% | very high |
| August Weather | 22°C (72°F) | 103 mm (4.0 inches) | 69% | very high |
| September Weather | 19°C (67°F) | 116 mm (4.6 inches) | 74% | very high |
| October Weather | 11°C (52°F) | 115 mm (4.5 inches) | 79% | moderate |
| November Weather | 3°C (37°F) | 47 mm (1.8 inches) | 88% | moderate |
| December Weather | -1°C (31°F) | 45 mm (1.8 inches) | 82% | low |