Last updated: June 24, 2025
The average temperature in Willow Creek, United States during September is 16°C (61°F). However, be prepared for temperature fluctuations, as it can drop to a chilly 2°C (37°F) or rise to a scorching 37°C (98°F). This month also sees precipitation of around 34 mm (1.3 in) over approximately 3 days, with an average humidity level of 62%.
In September in Willow Creek, the average temperature is 16°C (61°F). The maximum can reach 37°C (98°F), while the minimum can drop as low as 2°C (37°F). Be prepared for a wide range of temperatures when traveling during this month.
In Willow Creek in September, the precipitation amount is 34 mm (1.3 in) over the course of 3 days.
In Willow Creek in September, humidity is 62%. With an average temperature of 16°C (61°F), this humidity feels like a gentle blanket, making traveling comfortable yet occasionally sticky, prompting the need for light, breathable clothing to fully enjoy the sights.
In Willow Creek in September, 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 Willow Creek.
UV Risk Categories
Weather in Willow Creek varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Willow Creek, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 5°C (42°F) | 243 mm (9.5 inches) | 86% | moderate |
February Weather | 5°C (42°F) | 228 mm (9.0 inches) | 85% | moderate |
March Weather | 7°C (44°F) | 187 mm (7.4 inches) | 85% | high |
April Weather | 9°C (49°F) | 121 mm (4.8 inches) | 82% | very high |
May Weather | 12°C (54°F) | 68 mm (2.7 inches) | 81% | extreme |
June Weather | 15°C (60°F) | 24 mm (1.0 inches) | 79% | extreme |
July Weather | 18°C (65°F) | 2 mm (0.1 inches) | 70% | very high |
August Weather | 19°C (66°F) | 1 mm (0.0 inches) | 60% | very high |
September Weather | 16°C (61°F) | 34 mm (1.3 inches) | 62% | very high |
October Weather | 12°C (54°F) | 69 mm (2.7 inches) | 72% | high |
November Weather | 8°C (46°F) | 160 mm (6.3 inches) | 87% | moderate |
December Weather | 5°C (40°F) | 182 mm (7.2 inches) | 86% | low |