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September Weather in Aurora, United States

Last updated: June 24, 2025

In September, the average temperature in Aurora, United States hovers around 17°C (64°F), with extremes ranging from a chilly -9°C (16°F) to a warm 35°C (94°F). Precipitation is relatively light, with only 20 mm (0.8 in) falling over 4 days. The average humidity sits comfortably at 47%, providing a mild climate perfect for outdoor activities.

September Temperature in Aurora

In September in Aurora, the average temperature is 17°C (64°F). Maximums can reach 35°C (94°F), and minimums can be as low as -9°C (16°F). This diverse range of temperatures makes Aurora an ideal destination for travelers seeking both warm days and cooler nights.

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 17°C (64°F), with highs reaching up to 35°C (94°F) and lows dropping to around -9°C (16°F).
JanFebMarAprMayJunJulAugSepOctNovDec242734445468757363463725
Data source: Temperature data for Aurora generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Aurora

In Aurora in September, the total precipitation amount is 20 mm (0.8 in) spread over a period of 4 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 20 mm (0.8 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec45546148478151620392943
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Aurora

In Aurora in September, humidity is 47%. With an average temperature of 17°C (64°F), this humidity feels like a refreshing embrace, making it pleasant for outdoor activities and sightseeing, allowing travelers to explore comfortably without feeling sticky or overheated.

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 47%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%77%70%54%45%37%34%47%67%82%87%
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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101112121110753
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.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)45 mm (1.8 inches)87%moderate
February Weather-3°C (27°F)54 mm (2.1 inches)88%high
March Weather1°C (35°F)61 mm (2.4 inches)77%very high
April Weather7°C (45°F)48 mm (1.9 inches)69%very high
May Weather12°C (55°F)47 mm (1.9 inches)54%extreme
June Weather20°C (69°F)8 mm (0.3 inches)45%extreme
July Weather24°C (75°F)15 mm (0.6 inches)37%extreme
August Weather23°C (73°F)16 mm (0.6 inches)34%extreme
September Weather17°C (64°F)20 mm (0.8 inches)47%very high
October Weather8°C (46°F)39 mm (1.5 inches)67%high
November Weather3°C (38°F)29 mm (1.2 inches)82%moderate
December Weather-4°C (26°F)43 mm (1.7 inches)87%moderate

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