Last updated: June 24, 2025
In September, the average temperature in Valley City, United States hovers around 15°C (60°F). Expect a range of temperatures, with minimums dipping to -2°C (29°F) and maximums soaring to 32°C (89°F). During this period, anticipate approximately 70 mm (2.7 in) of precipitation spread over 7 days, coupled with an average humidity of 72%.
In September, in Valley City, the average temperature is 15°C (60°F). Maximums can reach 32°C (89°F) while minimums can drop as low as -2°C (29°F). Be prepared for a wide range of temperatures, ideal for layering your travel wardrobe.
In Valley City in September, the precipitation amount is 70 mm (2.7 in) over a period of 7 days.
In Valley City in September humidity is 72%. With an average temperature of 15°C (60°F), this humidity feels like a warm embrace, creating a slightly muggy atmosphere that can make strolling around a bit sticky. Travelers might find themselves longing for a refreshing breeze, and it’s advisable to stay hydrated while exploring local sights.
In Valley City 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 Valley City.
UV Risk Categories
Weather in Valley City varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Valley City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -12°C (11°F) | 18 mm (0.7 inches) | 87% | low |
| February Weather | -13°C (9°F) | 20 mm (0.8 inches) | 89% | moderate |
| March Weather | -3°C (27°F) | 25 mm (1.0 inches) | 82% | moderate |
| April Weather | 4°C (39°F) | 45 mm (1.8 inches) | 79% | high |
| May Weather | 13°C (55°F) | 57 mm (2.2 inches) | 74% | very high |
| June Weather | 20°C (68°F) | 86 mm (3.4 inches) | 78% | very high |
| July Weather | 22°C (72°F) | 73 mm (2.9 inches) | 76% | very high |
| August Weather | 20°C (68°F) | 100 mm (3.9 inches) | 77% | very high |
| September Weather | 15°C (60°F) | 70 mm (2.7 inches) | 72% | high |
| October Weather | 6°C (43°F) | 80 mm (3.1 inches) | 74% | moderate |
| November Weather | -2°C (29°F) | 17 mm (0.7 inches) | 85% | moderate |
| December Weather | -8°C (18°F) | 37 mm (1.5 inches) | 84% | low |