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September Weather in Coulee City, United States

Last updated: June 24, 2025

In Coulee City, United States, the average temperature in September hovers around 19°C (66°F), making it a comfortable month to explore. Be prepared for temperature variations, as lows can dip to 3°C (38°F), while highs may reach up to 37°C (99°F). Expect a modest precipitation of 16 mm (0.6 in) over 3 days, and with an average humidity of 60%, the weather is generally pleasant.

September Temperature in Coulee City

In September in Coulee City, the average temperature is 19°C (66°F). Maximums can reach 37°C (99°F), while minimums can drop to as low as 3°C (38°F). This variation in temperature makes Coulee City an ideal destination for travelers seeking both warmth and cooler evenings.

September Weather in Coulee City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Coulee City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Coulee City, September typically has an average temperature of 19°C (66°F), with highs reaching up to 37°C (99°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec303142516370787766503932
Data source: Temperature data for Coulee City 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 Coulee City

In Coulee City in September, the precipitation amount is 16 mm (0.6 in), spread over a duration of 3 days.

September Precipitation Trends in Coulee City

The chart displays monthly precipitation patterns in Coulee City, 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 Coulee City, September typically receives around 16 mm (0.6 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec483831281882416334040
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Coulee City

In Coulee City in September, humidity is 60%. With an average temperature of 19°C (66°F), this humidity feels like a warm, slightly sticky embrace, making traveling enjoyable yet necessitating occasional breaks to stay refreshed.

September Average Humidity in Coulee City

This chart illustrates the average monthly humidity levels in Coulee City, 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 Coulee City is approximately 60%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%82%77%79%77%62%60%80%87%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Coulee City

In Coulee City 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 Coulee City.

Maximum UV Index Levels in Coulee City for September

The chart shows the monthly maximum UV Index (UVI) for Coulee City 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 Coulee City typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2456891097532
Data source: Coulee City 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 Coulee City Compares to Other Months

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

This table compares monthly weather conditions in Coulee City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)48 mm (1.9 inches)85%low
February Weather-1°C (31°F)38 mm (1.5 inches)86%moderate
March Weather6°C (42°F)31 mm (1.2 inches)86%moderate
April Weather11°C (52°F)28 mm (1.1 inches)82%high
May Weather17°C (63°F)18 mm (0.7 inches)77%very high
June Weather21°C (71°F)8 mm (0.3 inches)79%very high
July Weather26°C (78°F)2 mm (0.1 inches)77%very high
August Weather25°C (77°F)4 mm (0.2 inches)62%very high
September Weather19°C (66°F)16 mm (0.6 inches)60%high
October Weather10°C (50°F)33 mm (1.3 inches)80%moderate
November Weather4°C (40°F)40 mm (1.6 inches)87%moderate
December Weather0°C (32°F)40 mm (1.6 inches)86%low

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