Last updated: June 24, 2025
In Aurora, United States, the average temperature in September is a pleasant 20°C (68°F). However, temperatures can vary widely; you might experience a chilly 0°C (32°F) at the lowest, while the mercury could soar to a steamy 37°C (100°F) at its peak. Expect an average of 22 mm (0.9 in) of precipitation spread across 4 days, and with an average humidity of 79%, it’s a month to prepare for a bit of stickiness!
In September in Aurora, the average temperature is 20°C (68°F). Maximums can reach 37°C (100°F), and minimums can be as low as 0°C (32°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack both light clothing for the heat and layers for the cooler nights.
In Aurora in September, the precipitation amount is 22 mm (0.9 in) over a duration of 4 days.
In Aurora in September humidity is 79%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that clings to the skin, making outdoor activities feel more strenuous and prompting the need for frequent breaks and hydration while traveling.
In Aurora 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 Aurora.
UV Risk Categories
Weather in Aurora varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Aurora, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (32°F) | 15 mm (0.6 inches) | 74% | moderate |
| February Weather | -1°C (31°F) | 16 mm (0.6 inches) | 75% | moderate |
| March Weather | 6°C (42°F) | 50 mm (2.0 inches) | 66% | very high |
| April Weather | 10°C (50°F) | 38 mm (1.5 inches) | 62% | very high |
| May Weather | 14°C (58°F) | 79 mm (3.1 inches) | 74% | extreme |
| June Weather | 22°C (71°F) | 39 mm (1.6 inches) | 76% | extreme |
| July Weather | 24°C (76°F) | 42 mm (1.7 inches) | 75% | extreme |
| August Weather | 23°C (74°F) | 34 mm (1.3 inches) | 80% | extreme |
| September Weather | 20°C (68°F) | 22 mm (0.9 inches) | 79% | very high |
| October Weather | 10°C (51°F) | 24 mm (0.9 inches) | 77% | high |
| November Weather | 5°C (42°F) | 14 mm (0.6 inches) | 74% | moderate |
| December Weather | 1°C (35°F) | 7 mm (0.3 inches) | 80% | moderate |