Last updated: June 24, 2025
In September, the average temperature in East Grand Forks, United States hovers around 15°C (60°F), with a noteworthy range where minimums can dip to -3°C (28°F) and highs can soar up to 32°C (90°F). Expect an average precipitation of 73 mm (2.9 in) spread over 9 days, along with a comfortable average humidity level of 77%.
In September in East Grand Forks, the average temperature is 15°C (60°F). Maximums can reach 32°C (90°F) while minimums can dip as low as -3°C (28°F). Be prepared for a wide range of temperatures when traveling during this month.
In East Grand Forks in September, the precipitation amount is 73 mm (2.9 in), occurring over the course of 9 days.
In East Grand Forks in September, humidity is 77%. With an average temperature of 15°C (60°F), this humidity feels like you're wading through a warm, heavy blanket, making travel feel more exhausting and sticky than usual.
In East Grand Forks in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in East Grand Forks.
UV Risk Categories
Weather in East Grand Forks varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in East Grand Forks, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -13°C (9°F) | 18 mm (0.7 inches) | 90% | low |
| February Weather | -14°C (8°F) | 20 mm (0.8 inches) | 92% | moderate |
| March Weather | -3°C (26°F) | 24 mm (1.0 inches) | 85% | moderate |
| April Weather | 4°C (39°F) | 35 mm (1.4 inches) | 81% | high |
| May Weather | 13°C (56°F) | 55 mm (2.2 inches) | 75% | very high |
| June Weather | 20°C (69°F) | 83 mm (3.3 inches) | 79% | very high |
| July Weather | 22°C (72°F) | 59 mm (2.3 inches) | 76% | very high |
| August Weather | 20°C (68°F) | 76 mm (3.0 inches) | 78% | very high |
| September Weather | 15°C (60°F) | 73 mm (2.9 inches) | 77% | high |
| October Weather | 6°C (44°F) | 80 mm (3.1 inches) | 79% | moderate |
| November Weather | -3°C (27°F) | 26 mm (1.0 inches) | 86% | low |
| December Weather | -9°C (17°F) | 36 mm (1.4 inches) | 86% | low |