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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 19°C (67°F), with minimums dropping to 4°C (39°F) and maximums peaking at 35°C (95°F). Expect about 64 mm (2.5 in) of precipitation over 7 days, accompanied by an average humidity of 77%.

September Temperature in Elgin

In September in Elgin, the average temperature is 19°C (67°F). Maximums can reach 35°C (95°F), and minimums can be as low as 4°C (39°F). This diverse temperature range makes Elgin an ideal destination for travelers looking to enjoy both warm days and cool 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 19°C (67°F), with highs reaching up to 35°C (95°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec242338475973767367503829
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 64 mm (2.5 in) accumulated over a period of 7 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 64 mm (2.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec2524877015093938964852443
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 77%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel slightly more challenging as the air clings to your skin, turning every step into a leisurely stroll through a sauna.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%81%69%71%80%83%84%84%77%72%80%79%
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.
JanFebMarAprMayJunJulAugSepOctNovDec356891110108642
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-5°C (24°F)25 mm (1.0 inches)73%moderate
February Weather-5°C (24°F)24 mm (0.9 inches)81%moderate
March Weather3°C (38°F)87 mm (3.4 inches)69%high
April Weather8°C (47°F)70 mm (2.7 inches)71%very high
May Weather15°C (60°F)150 mm (5.9 inches)80%very high
June Weather23°C (73°F)93 mm (3.7 inches)83%extreme
July Weather24°C (76°F)93 mm (3.6 inches)84%very high
August Weather23°C (73°F)89 mm (3.5 inches)84%very high
September Weather19°C (67°F)64 mm (2.5 inches)77%very high
October Weather10°C (50°F)85 mm (3.4 inches)72%high
November Weather3°C (38°F)24 mm (0.9 inches)80%moderate
December Weather-2°C (29°F)43 mm (1.7 inches)79%low

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