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September Weather in Jerseyville, United States

Last updated: June 24, 2025

In September, the average temperature in Jerseyville, United States is a comfortable 22°C (72°F). However, temperatures can range from a refreshing 7°C (44°F) to a warm 34°C (94°F). Expect about 67 mm (2.6 in) of precipitation over 6 days of the month, accompanied by an average humidity level of 76%.

September Temperature in Jerseyville

In September in Jerseyville, the average temperature is 22°C (72°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 7°C (44°F). This comfortable climate makes Jerseyville an ideal destination for travelers looking to enjoy a variety of outdoor activities.

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

The chart illustrates September temperature patterns in Jerseyville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jerseyville, September typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (94°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec313446546776797672584338
Data source: Temperature data for Jerseyville 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 Jerseyville

In Jerseyville in September, the precipitation amount is 67 mm (2.6 in) over the course of 6 days.

September Precipitation Trends in Jerseyville

The chart displays monthly precipitation patterns in Jerseyville, 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 Jerseyville, September typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec737813212315010196119671007054
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Jerseyville

In Jerseyville in September humidity is 76%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as you navigate through the thick, saturated air.

September Average Humidity in Jerseyville

This chart illustrates the average monthly humidity levels in Jerseyville, 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 Jerseyville is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Jerseyville

In Jerseyville in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Jerseyville.

Maximum UV Index Levels in Jerseyville for September

The chart shows the monthly maximum UV Index (UVI) for Jerseyville 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 Jerseyville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111199643
Data source: Jerseyville 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 Jerseyville Compares to Other Months

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

This table compares monthly weather conditions in Jerseyville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)73 mm (2.9 inches)82%moderate
February Weather1°C (35°F)78 mm (3.1 inches)80%moderate
March Weather8°C (46°F)132 mm (5.2 inches)80%high
April Weather12°C (55°F)123 mm (4.9 inches)80%very high
May Weather19°C (67°F)150 mm (5.9 inches)82%very high
June Weather25°C (77°F)101 mm (4.0 inches)83%extreme
July Weather26°C (79°F)96 mm (3.8 inches)81%extreme
August Weather24°C (76°F)119 mm (4.7 inches)80%very high
September Weather22°C (72°F)67 mm (2.6 inches)76%very high
October Weather15°C (59°F)100 mm (3.9 inches)76%high
November Weather6°C (44°F)70 mm (2.8 inches)85%moderate
December Weather3°C (38°F)54 mm (2.1 inches)86%moderate

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