September Weather in Aurora, United States

Last updated: June 24, 2025

In September, the average temperature in Aurora, United States is a comfortable 21°C (70°F). However, you can expect a range, with lows dipping to 4°C (40°F) and highs soaring up to 36°C (97°F). During this month, the region experiences about 62 mm (2.4 in) of precipitation spread over 6 days, and an average humidity of 77% adds to the overall climate experience.

September Temperature in Aurora

In September in Aurora, the average temperature is 21°C (70°F), with maximums reaching 36°C (97°F) and minimums dropping to as low as 4°C (40°F). This diverse range of temperatures makes it a perfect time to pack layers and enjoy various outdoor activities.

September Weather in Aurora: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Aurora, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Aurora, September typically has an average temperature of 21°C (70°F), with highs reaching up to 36°C (97°F) and lows dropping to around 4°C (40°F).

Data source: Temperature data for Aurora generated using information from the Copernicus Climate Change Service.

September Precipitation in Aurora

In Aurora in September, the precipitation amount is 62 mm (2.4 in), spread over the course of 6 days.

September Precipitation Trends in Aurora

The chart displays monthly precipitation patterns in Aurora, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Aurora, September typically receives around 62 mm (2.4 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Aurora

In Aurora in September, humidity is 77%. With an average temperature of 21°C (70°F), this humidity feels like a warm, slightly sticky embrace, making travel invigorating yet slightly uncomfortable as you navigate the vibrant streets and outdoor attractions.

September Average Humidity in Aurora

This chart illustrates the average monthly humidity levels in Aurora, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Aurora is approximately 77%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Aurora

In Aurora 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 Aurora.

Maximum UV Index Levels in Aurora for September

The chart shows the monthly maximum UV Index (UVI) for Aurora in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Aurora typically reaches 8, which falls under the very high exposure category.

Data source: Aurora September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Aurora Compares to Other Months

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.

This table compares monthly weather conditions in Aurora, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	30 mm (1.2 inches)	73%	moderate
February Weather	-3°C (26°F)	21 mm (0.8 inches)	81%	moderate
March Weather	5°C (41°F)	88 mm (3.5 inches)	69%	high
April Weather	10°C (50°F)	53 mm (2.1 inches)	71%	very high
May Weather	17°C (62°F)	158 mm (6.2 inches)	80%	very high
June Weather	24°C (75°F)	93 mm (3.7 inches)	83%	extreme
July Weather	25°C (78°F)	65 mm (2.6 inches)	84%	very high
August Weather	24°C (75°F)	76 mm (3.0 inches)	84%	very high
September Weather	21°C (70°F)	62 mm (2.4 inches)	77%	very high
October Weather	11°C (52°F)	84 mm (3.3 inches)	72%	high
November Weather	5°C (41°F)	22 mm (0.9 inches)	80%	moderate
December Weather	0°C (32°F)	42 mm (1.6 inches)	79%	moderate