Last updated: June 24, 2025
In September, the average temperature in Coon Valley, United States hovers around 18°C (65°F). Expect a broad range, with minimum temperatures dipping to 4°C (39°F) and maximums peaking at 33°C (92°F). The month brings 108 mm (4.2 in) of precipitation over approximately 10 days, accompanied by a humidity level of 74%. Stay prepared for a mix of weather as you enjoy this vibrant destination!
In September in Coon Valley, the average temperature is 18°C (65°F), with maximums reaching 33°C (92°F) and minimums dipping as low as 4°C (39°F). This diverse range of temperatures makes Coon Valley an ideal destination for travelers seeking both warm sunny days and cooler evenings.
In Coon Valley in September, the precipitation amount is 108 mm (4.2 in) distributed over a duration of 10 days.
In Coon Valley in September humidity is 74%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can make even short walks feel laborious, leading travelers to seek shade and refreshment more often.
In Coon Valley in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Coon Valley.
UV Risk Categories
Weather in Coon Valley varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Coon Valley, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 37 mm (1.5 inches) | 84% | low |
| February Weather | -6°C (21°F) | 52 mm (2.0 inches) | 85% | moderate |
| March Weather | 2°C (35°F) | 58 mm (2.3 inches) | 84% | moderate |
| April Weather | 7°C (45°F) | 87 mm (3.4 inches) | 83% | very high |
| May Weather | 15°C (59°F) | 136 mm (5.4 inches) | 75% | very high |
| June Weather | 21°C (71°F) | 122 mm (4.8 inches) | 79% | very high |
| July Weather | 23°C (74°F) | 106 mm (4.2 inches) | 75% | very high |
| August Weather | 21°C (71°F) | 111 mm (4.4 inches) | 69% | very high |
| September Weather | 18°C (65°F) | 108 mm (4.2 inches) | 74% | very high |
| October Weather | 10°C (50°F) | 120 mm (4.7 inches) | 79% | moderate |
| November Weather | 2°C (35°F) | 51 mm (2.0 inches) | 88% | moderate |
| December Weather | -3°C (27°F) | 43 mm (1.7 inches) | 82% | low |