Last updated: June 18, 2025
In May, the average temperature in Grand Forks, Canada hovers around 12°C (53°F), with a minimum of -3°C (27°F) and a maximum reaching 27°C (82°F). Expect 66 mm (2.6 in) of precipitation over approximately 10 days, and prepare for a generally humid atmosphere, with an average humidity level of 82%.
In May in Grand Forks, the average temperature is 12°C (53°F). Maximum temperatures can reach up to 27°C (82°F), while minimums can drop as low as -3°C (27°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.
In Grand Forks in May, the precipitation amount is 66 mm (2.6 in) over the course of 10 days.
In Grand Forks in May, humidity is 82%. With an average temperature of 12°C (53°F), this humidity feels like a damp blanket enveloping you, making travel uncomfortable and sticky, as you navigate through the thick air that weighs heavily on your skin.
In Grand Forks 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 Grand Forks.
UV Risk Categories
Weather in Grand Forks varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Grand Forks, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (24°F) | 74 mm (2.9 inches) | 90% | low |
| February Weather | -5°C (24°F) | 59 mm (2.3 inches) | 91% | moderate |
| March Weather | 1°C (34°F) | 68 mm (2.7 inches) | 89% | moderate |
| April Weather | 5°C (42°F) | 69 mm (2.7 inches) | 85% | high |
| May Weather | 12°C (53°F) | 66 mm (2.6 inches) | 82% | very high |
| June Weather | 16°C (61°F) | 45 mm (1.8 inches) | 81% | very high |
| July Weather | 20°C (69°F) | 13 mm (0.5 inches) | 84% | very high |
| August Weather | 20°C (68°F) | 18 mm (0.7 inches) | 75% | very high |
| September Weather | 13°C (57°F) | 45 mm (1.8 inches) | 74% | high |
| October Weather | 5°C (42°F) | 59 mm (2.3 inches) | 85% | moderate |
| November Weather | 0°C (33°F) | 71 mm (2.8 inches) | 88% | low |
| December Weather | -4°C (26°F) | 72 mm (2.8 inches) | 93% | low |