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September Weather in Elgin, United States

Last updated: June 24, 2025

In Elgin, United States, the average temperature in September hovers around 14°C (58°F). However, temperatures can swing from a chilly -2°C (29°F) to a scorching 35°C (96°F). With approximately 39 mm (1.5 in) of precipitation over about 5 days, you can expect a mix of sunshine and showers. The air is relatively comfortable, with an average humidity of 58%.

September Temperature in Elgin

In September in Elgin, the average temperature is 14°C (58°F). Maximums can reach 35°C (96°F) and minimums can be as low as -2°C (29°F). This diverse range means travelers should be prepared for both warm days and cool nights.

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

The chart illustrates September temperature patterns in Elgin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Elgin, September typically has an average temperature of 14°C (58°F), with highs reaching up to 35°C (96°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec292936435159696858453630
Data source: Temperature data for Elgin 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 Elgin

In Elgin in September, the precipitation amount is 39 mm (1.5 in) spread over a duration of 5 days.

September Precipitation Trends in Elgin

The chart displays monthly precipitation patterns in Elgin, 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 Elgin, September typically receives around 39 mm (1.5 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec9314597967244316397393111
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Elgin

In Elgin in September humidity is 58%. With an average temperature of 14°C (58°F), this humidity feels like a refreshing embrace, providing a pleasant contrast to the cooler air and making it a comfortable time for traveling and exploration.

September Average Humidity in Elgin

This chart illustrates the average monthly humidity levels in Elgin, 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 Elgin is approximately 58%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%85%83%77%81%77%60%58%75%85%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Elgin

In Elgin 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 Elgin.

Maximum UV Index Levels in Elgin for September

The chart shows the monthly maximum UV Index (UVI) for Elgin 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 Elgin typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34789101098542
Data source: Elgin 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 Elgin Compares to Other Months

Weather in Elgin varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Elgin, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Elgin, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)93 mm (3.7 inches)86%moderate
February Weather-2°C (29°F)144 mm (5.7 inches)86%moderate
March Weather2°C (36°F)97 mm (3.8 inches)85%high
April Weather6°C (43°F)95 mm (3.8 inches)83%very high
May Weather11°C (51°F)72 mm (2.8 inches)77%very high
June Weather15°C (59°F)44 mm (1.7 inches)81%very high
July Weather20°C (69°F)3 mm (0.1 inches)76%very high
August Weather20°C (68°F)16 mm (0.6 inches)60%very high
September Weather14°C (58°F)39 mm (1.5 inches)58%very high
October Weather7°C (45°F)73 mm (2.9 inches)75%moderate
November Weather2°C (36°F)93 mm (3.7 inches)85%moderate
December Weather-1°C (30°F)111 mm (4.4 inches)87%low

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