nomadseason

September Weather in Eau Claire, United States

Last updated: June 24, 2025

In September, the average temperature in Eau Claire, United States is a pleasant 17°C (63°F). Expect lows of 1°C (33°F) and highs reaching up to 33°C (92°F), offering a diverse range of weather. Throughout the month, you can anticipate about 96 mm (3.8 in) of precipitation spread over 10 days, contributing to an average humidity level of 80%. Stay prepared for a mix of sunny days and refreshing showers!

September Temperature in Eau Claire

In September in Eau Claire, the average temperature is 17°C (63°F). Maximum temperatures can reach 33°C (92°F), while the minimum can drop as low as 1°C (33°F). It's advisable to pack layers to accommodate the varying temperatures during your travels.

September Weather in Eau Claire: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Eau Claire, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Eau Claire, September typically has an average temperature of 17°C (63°F), with highs reaching up to 33°C (92°F) and lows dropping to around 1°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec171833435870736963483324
Data source: Temperature data for Eau Claire generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Eau Claire

In Eau Claire in September, the total precipitation amount is 96 mm (3.8 in) over a span of 10 days.

September Precipitation Trends in Eau Claire

The chart displays monthly precipitation patterns in Eau Claire, 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 Eau Claire, September typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec33485595130132117127961115151
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Eau Claire

In Eau Claire in September humidity is 80%. With an average temperature of 17°C (63°F), this humidity feels like you're walking through a thick, warm blanket, making travel feel slightly stifling and requiring frequent breaks to stay comfortable.

September Average Humidity in Eau Claire

This chart illustrates the average monthly humidity levels in Eau Claire, 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 Eau Claire is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%86%85%79%80%80%78%80%84%89%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Eau Claire

In Eau Claire in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Eau Claire.

Maximum UV Index Levels in Eau Claire for September

The chart shows the monthly maximum UV Index (UVI) for Eau Claire 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 Eau Claire typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458810997532
Data source: Eau Claire 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 Eau Claire Compares to Other Months

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

This table compares monthly weather conditions in Eau Claire, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)33 mm (1.3 inches)88%low
February Weather-8°C (18°F)48 mm (1.9 inches)89%moderate
March Weather1°C (34°F)55 mm (2.2 inches)86%moderate
April Weather6°C (44°F)95 mm (3.7 inches)85%very high
May Weather15°C (59°F)130 mm (5.1 inches)79%very high
June Weather21°C (70°F)132 mm (5.2 inches)80%very high
July Weather23°C (73°F)117 mm (4.6 inches)80%very high
August Weather21°C (70°F)127 mm (5.0 inches)78%very high
September Weather17°C (63°F)96 mm (3.8 inches)80%high
October Weather9°C (48°F)111 mm (4.4 inches)84%moderate
November Weather1°C (34°F)51 mm (2.0 inches)89%moderate
December Weather-4°C (24°F)51 mm (2.0 inches)85%low

Compare Eau Claire's Climate with Cities Worldwide