Last updated: June 24, 2025
In West Richland, United States, the average temperature in May is a pleasant 19°C (67°F). However, temperatures can vary significantly, dipping as low as 3°C (38°F) and soaring up to 37°C (98°F). During this month, expect 13 mm (0.5 in) of precipitation spread over just 4 days, while the average humidity hovers around a sticky 77%.
In May in West Richland, the average temperature is 19°C (67°F). Maximums can reach 37°C (98°F), while minimums can drop to as low as 3°C (38°F). It's advisable to pack layers to accommodate the wide temperature range during your travels.
In West Richland in May, the precipitation amount is 13 mm (0.5 in) over a span of 4 days.
In West Richland in May, humidity is 77%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel slightly more challenging as the air clings to your skin, turning every step into a leisurely stroll through a sauna.
In West Richland 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 West Richland.
UV Risk Categories
Weather in West Richland varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in West Richland, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (35°F) | 36 mm (1.4 inches) | 85% | low |
| February Weather | 2°C (37°F) | 39 mm (1.5 inches) | 86% | moderate |
| March Weather | 8°C (47°F) | 26 mm (1.0 inches) | 86% | moderate |
| April Weather | 13°C (56°F) | 22 mm (0.9 inches) | 82% | high |
| May Weather | 19°C (67°F) | 13 mm (0.5 inches) | 77% | very high |
| June Weather | 24°C (75°F) | 7 mm (0.3 inches) | 79% | very high |
| July Weather | 28°C (82°F) | 0 mm (0.0 inches) | 77% | very high |
| August Weather | 27°C (80°F) | 3 mm (0.1 inches) | 62% | very high |
| September Weather | 20°C (69°F) | 8 mm (0.3 inches) | 60% | high |
| October Weather | 12°C (54°F) | 23 mm (0.9 inches) | 80% | moderate |
| November Weather | 6°C (42°F) | 30 mm (1.2 inches) | 87% | moderate |
| December Weather | 2°C (36°F) | 30 mm (1.2 inches) | 86% | low |