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September Weather in Council Bluffs, United States

Last updated: June 24, 2025

In September, the average temperature in Council Bluffs, United States hovers around 21°C (69°F). Visitors can expect a range that dips to a chilly 4°C (40°F) and peaks at a warm 36°C (96°F). With an average humidity of 75% and 86 mm (3.4 in) of precipitation spread over 9 days, be prepared for a mix of weather during your stay.

September Temperature in Council Bluffs

In September in Council Bluffs, the average temperature is 21°C (69°F). Maximums can reach 36°C (96°F), while minimums can drop as low as 4°C (40°F). This wide range of temperatures makes Council Bluffs an ideal destination for travelers seeking both warm and cool experiences during their visit.

September Weather in Council Bluffs: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Council Bluffs, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Council Bluffs, September typically has an average temperature of 21°C (69°F), with highs reaching up to 36°C (96°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec252541506375787469534031
Data source: Temperature data for Council Bluffs 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 Council Bluffs

In Council Bluffs in September, the precipitation amount is 86 mm (3.4 in), falling over the course of 9 days.

September Precipitation Trends in Council Bluffs

The chart displays monthly precipitation patterns in Council Bluffs, 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 Council Bluffs, September typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec3333955915613375105861353236
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Council Bluffs

In Council Bluffs in September, humidity is 75%. With an average temperature of 21°C (69°F), this humidity feels like a warm, sticky embrace that can make even a short walk feel exhausting for travelers, often leading to a longing for refreshing breezes or air-conditioned retreats.

September Average Humidity in Council Bluffs

This chart illustrates the average monthly humidity levels in Council Bluffs, 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 Council Bluffs is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%73%75%78%82%83%81%75%75%82%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Council Bluffs

In Council Bluffs 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 Council Bluffs.

Maximum UV Index Levels in Council Bluffs for September

The chart shows the monthly maximum UV Index (UVI) for Council Bluffs 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 Council Bluffs typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Council Bluffs 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 Council Bluffs Compares to Other Months

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

This table compares monthly weather conditions in Council Bluffs, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)33 mm (1.3 inches)76%moderate
February Weather-4°C (26°F)33 mm (1.3 inches)80%moderate
March Weather5°C (41°F)95 mm (3.7 inches)73%high
April Weather10°C (50°F)59 mm (2.3 inches)74%very high
May Weather17°C (63°F)156 mm (6.1 inches)78%very high
June Weather24°C (76°F)133 mm (5.2 inches)82%very high
July Weather25°C (78°F)75 mm (3.0 inches)83%very high
August Weather23°C (75°F)105 mm (4.1 inches)80%very high
September Weather21°C (69°F)86 mm (3.4 inches)75%very high
October Weather11°C (53°F)135 mm (5.3 inches)75%high
November Weather4°C (40°F)32 mm (1.3 inches)82%moderate
December Weather-1°C (31°F)36 mm (1.4 inches)83%low

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