Last updated: June 24, 2025
In May, the average temperature in Happy Valley, United States is a pleasant 14°C (58°F). However, don't be surprised if you experience a minimum of 3°C (37°F) or a warm maximum of 32°C (90°F). Be prepared for some rain, as the area sees an average precipitation of 71 mm (2.8 in) spread over 11 days, contributing to a cozy average humidity of 83%.
In May in Happy Valley, the average temperature is 14°C (58°F). Maximum temperatures can reach up to 32°C (90°F), while minimum temperatures can drop as low as 3°C (37°F). Whether you're planning outdoor adventures or city explorations, be sure to pack for a range of temperatures to fully enjoy your trip.
In Happy Valley in May, the precipitation amount is 71 mm (2.8 in) distributed over 11 days.
In Happy Valley in May, humidity is 83%. With an average temperature of 14°C (58°F), this humidity feels like a thick blanket enveloping you, making exploration feel heavier and sweatier, so be prepared for a slower pace while traveling.
In Happy Valley 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 Happy Valley.
UV Risk Categories
Weather in Happy Valley varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Happy Valley, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (41°F) | 203 mm (8.0 inches) | 85% | low |
| February Weather | 5°C (41°F) | 227 mm (9.0 inches) | 84% | moderate |
| March Weather | 8°C (46°F) | 161 mm (6.3 inches) | 85% | moderate |
| April Weather | 11°C (51°F) | 142 mm (5.6 inches) | 83% | high |
| May Weather | 14°C (58°F) | 71 mm (2.8 inches) | 83% | very high |
| June Weather | 18°C (64°F) | 59 mm (2.3 inches) | 83% | very high |
| July Weather | 21°C (69°F) | 7 mm (0.3 inches) | 82% | very high |
| August Weather | 21°C (70°F) | 10 mm (0.4 inches) | 74% | very high |
| September Weather | 18°C (64°F) | 83 mm (3.3 inches) | 71% | high |
| October Weather | 11°C (53°F) | 155 mm (6.1 inches) | 81% | moderate |
| November Weather | 8°C (46°F) | 207 mm (8.1 inches) | 87% | moderate |
| December Weather | 5°C (41°F) | 233 mm (9.2 inches) | 87% | low |