September Weather in Le Claire, United States

Last updated: June 24, 2025

In September, the average temperature in Le Claire, United States hovers around 20°C (69°F), creating a pleasant atmosphere. Expect temperature fluctuations with a minimum of 5°C (41°F) and a maximum reaching 34°C (94°F). This month also brings 107 mm (4.2 in) of precipitation over approximately 10 days, contributing to an average humidity of 78%.

September Temperature in Le Claire

In September in Le Claire, the average temperature is 20°C (69°F). Maximums can reach 34°C (94°F), while minimums can drop as low as 5°C (41°F). This makes Le Claire a suitable destination for travelers looking to experience mild weather with the possibility of warmer days.

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

The chart illustrates September temperature patterns in Le Claire, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Le Claire, September typically has an average temperature of 20°C (69°F), with highs reaching up to 34°C (94°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec242740496373777468543932
Data source: Temperature data for Le Claire 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 Le Claire

In Le Claire in September, the precipitation amount is 107 mm (4.2 in) accumulated over a period of 10 days.

September Precipitation Trends in Le Claire

The chart displays monthly precipitation patterns in Le 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 Le Claire, September typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec56599310914913788731071205049
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Le Claire

In Le Claire in September, humidity is 78%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick and heavy, urging you to seek out shaded areas and refreshing drinks.

September Average Humidity in Le Claire

This chart illustrates the average monthly humidity levels in Le 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 Le Claire is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%81%81%82%78%81%79%77%78%79%87%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Le Claire

In Le Claire 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 Le Claire.

Maximum UV Index Levels in Le Claire for September

The chart shows the monthly maximum UV Index (UVI) for Le 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 Le Claire typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098642
Data source: Le 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 Le Claire Compares to Other Months

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

This table compares monthly weather conditions in Le Claire, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (24°F)55 mm (2.2 inches)81%moderate
February Weather-3°C (27°F)59 mm (2.3 inches)81%moderate
March Weather5°C (40°F)93 mm (3.6 inches)81%high
April Weather10°C (50°F)109 mm (4.3 inches)82%very high
May Weather17°C (63°F)149 mm (5.9 inches)78%very high
June Weather23°C (74°F)137 mm (5.4 inches)81%extreme
July Weather25°C (77°F)88 mm (3.5 inches)79%very high
August Weather23°C (74°F)73 mm (2.9 inches)77%very high
September Weather20°C (69°F)107 mm (4.2 inches)78%very high
October Weather12°C (55°F)120 mm (4.7 inches)78%high
November Weather4°C (39°F)50 mm (2.0 inches)87%moderate
December Weather0°C (33°F)49 mm (1.9 inches)84%low

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