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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 27°C (81°F), making it quite a pleasant experience. However, be prepared for a wide range, as temperatures can dip to a minimum of 11°C (52°F) and soar to a scorching 39°C (102°F). The region sees about 117 mm (4.6 in) of precipitation spread over 12 days, contributing to an average humidity of 69%. Whether you're enjoying the warm days or the cooler nights, there's plenty to appreciate in this vibrant locale!

September Temperature in Elgin

In September in Elgin, the average temperature is 27°C (81°F). Maximum temperatures can reach 39°C (102°F), while minimums can drop as low as 11°C (52°F). This diverse temperature range makes Elgin an ideal destination for travelers looking to experience both warm days and cooler evenings.

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 27°C (81°F), with highs reaching up to 39°C (102°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec525464697782858681716055
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 total precipitation amount is 117 mm (4.6 in), occurring over a span of 12 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 117 mm (4.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec55646910514811085131117876485
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 69%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket wrapped around you, making it essential to stay hydrated and take frequent breaks during your travels.

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 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%80%78%79%81%77%71%67%69%73%82%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 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 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121110865
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 Weather11°C (52°F)55 mm (2.2 inches)79%moderate
February Weather12°C (54°F)64 mm (2.5 inches)80%very high
March Weather18°C (64°F)69 mm (2.7 inches)78%very high
April Weather20°C (69°F)105 mm (4.1 inches)79%extreme
May Weather25°C (77°F)147 mm (5.8 inches)81%extreme
June Weather28°C (83°F)110 mm (4.3 inches)77%extreme
July Weather29°C (85°F)85 mm (3.4 inches)71%extreme
August Weather30°C (86°F)131 mm (5.1 inches)67%extreme
September Weather27°C (81°F)117 mm (4.6 inches)69%very high
October Weather22°C (71°F)87 mm (3.4 inches)73%very high
November Weather16°C (61°F)64 mm (2.5 inches)82%high
December Weather13°C (56°F)85 mm (3.4 inches)87%moderate

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