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September Weather in Beloit, United States

Last updated: June 24, 2025

In September, the average temperature in Beloit, United States is a pleasant 22°C (72°F). However, temperatures can vary significantly, with a minimum of 5°C (41°F) and soaring up to a maximum of 38°C (100°F). Expect some rain, with an average precipitation of 57 mm (2.3 in) over about 5 days. The air is quite humid, with an average humidity level of 73%, making it an ideal time for outdoor adventures!

September Temperature in Beloit

In September in Beloit, the average temperature is 22°C (72°F). Maximums can reach 38°C (100°F) and minimums can be as low as 5°C (41°F). This variation makes it essential for travelers to pack both lightweight clothing for the warm days and warmer layers for the cooler evenings.

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

The chart illustrates September temperature patterns in Beloit, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Beloit, September typically has an average temperature of 22°C (72°F), with highs reaching up to 38°C (100°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec303045536478817772554335
Data source: Temperature data for Beloit 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 Beloit

In Beloit in September, the total precipitation amount is 57 mm (2.3 in) accumulated over 5 days.

September Precipitation Trends in Beloit

The chart displays monthly precipitation patterns in Beloit, 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 Beloit, September typically receives around 57 mm (2.3 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec25237349180648210357822337
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Beloit

In Beloit in September, humidity is 73%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace that can make outdoor activities feel sticky and heavy, so it's best to stay hydrated and take frequent breaks while exploring.

September Average Humidity in Beloit

This chart illustrates the average monthly humidity levels in Beloit, 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 Beloit is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%78%67%70%82%81%80%80%74%71%79%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Beloit

In Beloit 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 Beloit.

Maximum UV Index Levels in Beloit for September

The chart shows the monthly maximum UV Index (UVI) for Beloit 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 Beloit typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Beloit 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 Beloit Compares to Other Months

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

This table compares monthly weather conditions in Beloit, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)25 mm (1.0 inches)74%moderate
February Weather-1°C (31°F)23 mm (0.9 inches)78%moderate
March Weather7°C (45°F)73 mm (2.9 inches)67%high
April Weather12°C (54°F)49 mm (1.9 inches)70%very high
May Weather18°C (65°F)180 mm (7.1 inches)82%very high
June Weather26°C (78°F)64 mm (2.5 inches)81%extreme
July Weather27°C (81°F)82 mm (3.2 inches)80%extreme
August Weather25°C (77°F)103 mm (4.1 inches)80%very high
September Weather22°C (72°F)57 mm (2.3 inches)73%very high
October Weather13°C (55°F)82 mm (3.2 inches)71%high
November Weather6°C (43°F)23 mm (0.9 inches)79%moderate
December Weather2°C (35°F)36 mm (1.4 inches)83%moderate

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