Last updated: June 24, 2025
In September, the average temperature in Fox River, United States hovers around 8°C (47°F), with a minimum of -3°C (26°F) and a maximum of 19°C (66°F). Expect significant rainfall, with an average precipitation of 150 mm (5.9 in) over approximately 17 days. Coupled with a high humidity of 90%, this month presents a cool and damp climate, perfect for cozy indoor activities!
In September in Fox River, the average temperature is 8°C (47°F). The maximum can reach 19°C (66°F) and the minimum can be as low as -3°C (26°F). Be prepared for a mix of mild days and chilly evenings during your travels.
In Fox River in September, the precipitation amount is 150 mm (5.9 in) over a span of 17 days.
In Fox River in September, humidity is 90%. With an average temperature of 8°C (47°F), this humidity feels like a damp chill enveloping you, making even short walks outside feel uncomfortable and heavy, as if the air is thick with moisture.
In Fox River in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Fox River for better planning.
UV Risk Categories
Weather in Fox River varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Fox River, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 144 mm (5.7 inches) | 92% | low |
| February Weather | -5°C (23°F) | 95 mm (3.7 inches) | 92% | low |
| March Weather | -5°C (24°F) | 91 mm (3.6 inches) | 86% | moderate |
| April Weather | 1°C (33°F) | 86 mm (3.4 inches) | 79% | moderate |
| May Weather | 4°C (40°F) | 128 mm (5.0 inches) | 87% | high |
| June Weather | 10°C (50°F) | 77 mm (3.0 inches) | 91% | high |
| July Weather | 13°C (56°F) | 83 mm (3.3 inches) | 92% | high |
| August Weather | 12°C (54°F) | 101 mm (4.0 inches) | 92% | high |
| September Weather | 8°C (47°F) | 150 mm (5.9 inches) | 90% | moderate |
| October Weather | 3°C (37°F) | 215 mm (8.5 inches) | 87% | low |
| November Weather | -5°C (24°F) | 166 mm (6.5 inches) | 91% | low |
| December Weather | -4°C (25°F) | 244 mm (9.6 inches) | 92% | low |