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September Weather in Elgin, United States

Last updated: June 24, 2025

In September, the average temperature in Elgin, United States sits at a pleasant 24°C (76°F). Expect a range where temperatures can dip to a cool 8°C (47°F) or soar up to a sizzling 38°C (101°F). During this time, precipitation averages around 95 mm (3.7 in) over 6 days, while the air maintains a moderate humidity level of 64%.

September Temperature in Elgin

In September in Elgin, the average temperature is 24°C (76°F), with maximums reaching up to 38°C (101°F) and minimums dropping as low as 8°C (47°F). Be prepared for warm days and cool evenings, making it ideal for both outdoor activities and cozy 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 24°C (76°F), with highs reaching up to 38°C (101°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec414255617180848276635145
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 95 mm (3.7 in) spread over a period of 6 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 95 mm (3.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec40428412014962365595932237
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 64%. With an average temperature of 24°C (76°F), this humidity feels like a warm, sticky embrace, making travel slightly uncomfortable but still enjoyable, as you may find yourself yearning for a refreshing breeze or a quick dip in the water.

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 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%76%70%72%82%82%80%72%64%71%81%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110754
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 Weather5°C (41°F)40 mm (1.6 inches)76%moderate
February Weather6°C (42°F)42 mm (1.6 inches)76%high
March Weather13°C (55°F)84 mm (3.3 inches)70%very high
April Weather16°C (61°F)120 mm (4.7 inches)72%very high
May Weather21°C (71°F)149 mm (5.9 inches)82%extreme
June Weather26°C (80°F)62 mm (2.4 inches)82%extreme
July Weather29°C (84°F)36 mm (1.4 inches)80%extreme
August Weather28°C (83°F)55 mm (2.2 inches)72%extreme
September Weather24°C (76°F)95 mm (3.7 inches)64%very high
October Weather17°C (63°F)93 mm (3.7 inches)71%high
November Weather11°C (51°F)22 mm (0.9 inches)81%moderate
December Weather7°C (45°F)37 mm (1.5 inches)84%moderate

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