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September Weather in Cedar Falls, United States

Last updated: June 24, 2025

In Cedar Falls, United States, the average temperature in September hovers around 19°C (67°F). Expect chilly lows of 2°C (37°F) and warm highs reaching up to 33°C (92°F). Be prepared for a bit of moisture, as this month sees around 117 mm (4.6 in) of precipitation over 10 days, coupled with an average humidity of 75%.

September Temperature in Cedar Falls

In September in Cedar Falls, the average temperature is 19°C (67°F). Maximums can reach 33°C (92°F), and minimums can be as low as 2°C (37°F). This variety in temperatures makes it essential for travelers to pack accordingly for both warm and cool conditions.

September Weather in Cedar Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Cedar Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cedar Falls, September typically has an average temperature of 19°C (67°F), with highs reaching up to 33°C (92°F) and lows dropping to around 2°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec202137476173757166513629
Data source: Temperature data for Cedar Falls 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 Cedar Falls

In Cedar Falls in September, the total precipitation amount is 117 mm (4.6 in) recorded over a span of 10 days.

September Precipitation Trends in Cedar Falls

The chart displays monthly precipitation patterns in Cedar Falls, 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 Cedar Falls, September typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec41507378160134104961171344936
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cedar Falls

In Cedar Falls in September humidity is 75%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel invigorating yet slightly sticky, as you navigate through the vibrant streets or scenic landscapes.

September Average Humidity in Cedar Falls

This chart illustrates the average monthly humidity levels in Cedar Falls, 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 Cedar Falls is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%80%81%74%81%80%77%75%80%87%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cedar Falls

In Cedar Falls 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 Cedar Falls.

Maximum UV Index Levels in Cedar Falls for September

The chart shows the monthly maximum UV Index (UVI) for Cedar Falls 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 Cedar Falls typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098533
Data source: Cedar Falls 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 Cedar Falls Compares to Other Months

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

This table compares monthly weather conditions in Cedar Falls, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)41 mm (1.6 inches)82%moderate
February Weather-6°C (21°F)50 mm (2.0 inches)84%moderate
March Weather3°C (37°F)73 mm (2.9 inches)80%high
April Weather8°C (47°F)78 mm (3.1 inches)81%very high
May Weather16°C (61°F)160 mm (6.3 inches)74%very high
June Weather23°C (73°F)134 mm (5.3 inches)80%extreme
July Weather24°C (75°F)104 mm (4.1 inches)80%very high
August Weather22°C (72°F)96 mm (3.8 inches)77%very high
September Weather19°C (67°F)117 mm (4.6 inches)75%very high
October Weather11°C (51°F)134 mm (5.3 inches)80%moderate
November Weather2°C (37°F)49 mm (1.9 inches)87%moderate
December Weather-2°C (29°F)36 mm (1.4 inches)83%moderate

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