Last updated: June 24, 2025
In May, the average temperature in La Grande, United States hovers around 10°C (50°F). Expect variations, with minimums potentially dropping to -5°C (24°F) and maximums reaching up to 27°C (81°F). Be prepared for some rainfall, as the area experiences 77 mm (3.0 in) of precipitation over about 13 days. Additionally, the climate tends to be quite humid, with an average humidity level of 77%.
In May in La Grande, the average temperature is 10°C (50°F). Maximums can reach 27°C (81°F), and minimums can be as low as -5°C (24°F). Travelers should be prepared for a range of temperatures and pack accordingly for both warm and cold conditions.
In La Grande in May, the precipitation amount is 77 mm (3.0 in) spread over a total of 13 days.
In La Grande in May, humidity is 77%. With an average temperature of 10°C (50°F), this humidity feels like a thick, heavy blanket enveloping you, making travel uncomfortable and sticky, as it clings to your skin and clothes, turning each step into a challenge.
In La Grande 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 La Grande.
UV Risk Categories
Weather in La Grande varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in La Grande, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (28°F) | 86 mm (3.4 inches) | 86% | moderate |
| February Weather | -3°C (28°F) | 130 mm (5.1 inches) | 86% | moderate |
| March Weather | 2°C (36°F) | 89 mm (3.5 inches) | 85% | high |
| April Weather | 5°C (42°F) | 86 mm (3.4 inches) | 83% | very high |
| May Weather | 10°C (50°F) | 77 mm (3.0 inches) | 77% | very high |
| June Weather | 14°C (58°F) | 44 mm (1.7 inches) | 81% | very high |
| July Weather | 20°C (68°F) | 3 mm (0.1 inches) | 76% | very high |
| August Weather | 19°C (67°F) | 16 mm (0.6 inches) | 60% | very high |
| September Weather | 14°C (57°F) | 35 mm (1.4 inches) | 58% | very high |
| October Weather | 6°C (44°F) | 64 mm (2.5 inches) | 75% | moderate |
| November Weather | 2°C (35°F) | 79 mm (3.1 inches) | 85% | moderate |
| December Weather | -2°C (29°F) | 96 mm (3.8 inches) | 87% | low |