Last updated: June 24, 2025
In Baraboo, United States, the average temperature in September hovers around 18°C (64°F), with a range that can dip to a chilly 1°C (35°F) and rise to a warm 33°C (92°F). Expect 104 mm (4.1 in) of precipitation over roughly 10 days, contributing to an average humidity level of 79%. Whether you're basking in the sun or enjoying a refreshing breeze, this month brings a delightful mix of weather!
In September in Baraboo, the average temperature is 18°C (64°F). The maximum can reach 33°C (92°F), while the minimum can drop as low as 1°C (35°F). This makes it an ideal time for outdoor activities and exploring the local attractions, but be sure to pack for both warm days and cool nights.
In Baraboo in September, the precipitation amount is 104 mm (4.1 in) over a period of 10 days.
In Baraboo in September, humidity is 79%. With an average temperature of 18°C (64°F), this humidity feels like a warm, sticky embrace that can make outdoor activities more challenging but also creates a lush, vibrant atmosphere that's perfect for exploring local culture and scenery.
In Baraboo 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 Baraboo.
UV Risk Categories
Weather in Baraboo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Baraboo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (21°F) | 45 mm (1.8 inches) | 85% | low |
| February Weather | -6°C (22°F) | 53 mm (2.1 inches) | 85% | moderate |
| March Weather | 2°C (35°F) | 58 mm (2.3 inches) | 85% | moderate |
| April Weather | 7°C (45°F) | 90 mm (3.6 inches) | 85% | very high |
| May Weather | 15°C (59°F) | 126 mm (5.0 inches) | 78% | very high |
| June Weather | 21°C (70°F) | 112 mm (4.4 inches) | 80% | very high |
| July Weather | 23°C (74°F) | 91 mm (3.6 inches) | 78% | very high |
| August Weather | 21°C (71°F) | 107 mm (4.2 inches) | 76% | very high |
| September Weather | 18°C (64°F) | 104 mm (4.1 inches) | 79% | high |
| October Weather | 10°C (51°F) | 109 mm (4.3 inches) | 83% | moderate |
| November Weather | 2°C (36°F) | 45 mm (1.8 inches) | 88% | moderate |
| December Weather | -2°C (28°F) | 45 mm (1.8 inches) | 81% | low |