Last updated: June 24, 2025
In May, the average temperature in Pendleton, United States hovers around 18°C (64°F), making it a pleasant time to visit. However, be prepared for a wide temperature range, with minimums dipping to -1°C (30°F) and maximums soaring to 33°C (92°F). Rainfall is also a factor, as you'll encounter about 136 mm (5.4 in) of precipitation over approximately 15 days. With an average humidity of 79%, don't forget to stay hydrated while enjoying this dynamic weather!
In May in Pendleton, the average temperature is 18°C (64°F). The maximum can reach 33°C (92°F) and the minimum can be as low as -1°C (30°F). It's advisable to pack layers and be prepared for both warm days and chilly nights during your travels.
In Pendleton in May, the precipitation amount is 136 mm (5.4 in) over a period of 15 days.
In Pendleton in May, humidity is 79%. With an average temperature of 18°C (64°F), this humidity feels like a warm, sticky embrace that can make outdoor activities more challenging but also creates a lush, vibrant atmosphere that's perfect for exploring local culture and scenery.
In Pendleton in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Pendleton.
UV Risk Categories
Weather in Pendleton varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Pendleton, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 81 mm (3.2 inches) | 87% | moderate |
| February Weather | 1°C (33°F) | 95 mm (3.7 inches) | 85% | moderate |
| March Weather | 6°C (42°F) | 124 mm (4.9 inches) | 86% | high |
| April Weather | 11°C (52°F) | 96 mm (3.8 inches) | 84% | very high |
| May Weather | 18°C (64°F) | 136 mm (5.4 inches) | 79% | very high |
| June Weather | 23°C (73°F) | 103 mm (4.1 inches) | 82% | extreme |
| July Weather | 25°C (76°F) | 112 mm (4.4 inches) | 79% | very high |
| August Weather | 23°C (74°F) | 87 mm (3.4 inches) | 70% | very high |
| September Weather | 21°C (70°F) | 79 mm (3.1 inches) | 69% | very high |
| October Weather | 14°C (58°F) | 102 mm (4.0 inches) | 76% | high |
| November Weather | 5°C (42°F) | 90 mm (3.5 inches) | 88% | moderate |
| December Weather | 2°C (36°F) | 77 mm (3.0 inches) | 87% | moderate |