Last updated: June 24, 2025
In September, the average temperature in Bourbonnais, United States hovers around 20°C (69°F), with a range that can dip to a chilly 4°C (40°F) and soar up to a sweltering 35°C (95°F). Expect about 80 mm (3.1 in) of precipitation spread over 9 days, adding to the ambiance with an average humidity of 80%. Dress accordingly for this variable weather!
In September in Bourbonnais, the average temperature is 20°C (69°F). Maximums can reach 35°C (95°F), and minimums can be as low as 4°C (40°F). This weather makes Bourbonnais an ideal destination for travelers seeking both warmth and cool, refreshing evenings.
In Bourbonnais in September, the precipitation amount is 80 mm (3.1 in) spread over 9 days.
In Bourbonnais in September, humidity is 80%. With an average temperature of 20°C (69°F), this humidity feels like a warm blanket enveloping you, making every step slightly more challenging as you navigate the air that clings to your skin, often leaving you longing for a cool breeze while exploring the sights.
In Bourbonnais 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 Bourbonnais.
UV Risk Categories
Weather in Bourbonnais varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bourbonnais, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 67 mm (2.6 inches) | 82% | moderate |
| February Weather | -2°C (29°F) | 70 mm (2.7 inches) | 83% | moderate |
| March Weather | 5°C (41°F) | 92 mm (3.6 inches) | 84% | high |
| April Weather | 10°C (50°F) | 121 mm (4.8 inches) | 85% | very high |
| May Weather | 17°C (63°F) | 160 mm (6.3 inches) | 79% | very high |
| June Weather | 23°C (73°F) | 127 mm (5.0 inches) | 82% | very high |
| July Weather | 24°C (76°F) | 99 mm (3.9 inches) | 80% | very high |
| August Weather | 23°C (74°F) | 86 mm (3.4 inches) | 81% | very high |
| September Weather | 20°C (69°F) | 80 mm (3.1 inches) | 80% | very high |
| October Weather | 13°C (56°F) | 135 mm (5.3 inches) | 82% | high |
| November Weather | 4°C (40°F) | 61 mm (2.4 inches) | 88% | moderate |
| December Weather | 1°C (34°F) | 57 mm (2.3 inches) | 84% | low |