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September Weather in Choteau, United States

Last updated: June 24, 2025

In September, the average temperature in Choteau, United States hovers around 13°C (57°F), with a notable range where minimums can dip to -4°C (25°F) and maximums soar to 33°C (92°F). Expect a moderate precipitation amount of 43 mm (1.7 in) spread over 6 days, while the air carries an average humidity of 68%.

September Temperature in Choteau

In September in Choteau, the average temperature is 13°C (57°F). The maximum can reach 33°C (92°F), and the minimum can be as low as -4°C (25°F). Be prepared for a wide range of temperatures when traveling to Choteau in September.

September Weather in Choteau: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Choteau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Choteau, September typically has an average temperature of 13°C (57°F), with highs reaching up to 33°C (92°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec241831395161686656423427
Data source: Temperature data for Choteau 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 Choteau

In Choteau in September, the precipitation amount is 43 mm (1.7 in) over a period of 6 days.

September Precipitation Trends in Choteau

The chart displays monthly precipitation patterns in Choteau, 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 Choteau, September typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec164027578273142343383028
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Choteau

In Choteau in September humidity is 68%. With an average temperature of 13°C (57°F), this humidity feels like a balmy embrace, making outdoor activities comfortable yet slightly cloistered, perfect for exploring cozy cafes or enjoying leisurely walks under the canopy of trees.

September Average Humidity in Choteau

This chart illustrates the average monthly humidity levels in Choteau, 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 Choteau is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%88%83%78%76%78%77%71%68%72%84%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Choteau

In Choteau 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 Choteau.

Maximum UV Index Levels in Choteau for September

The chart shows the monthly maximum UV Index (UVI) for Choteau 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 Choteau typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101098532
Data source: Choteau 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 Choteau Compares to Other Months

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

This table compares monthly weather conditions in Choteau, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (24°F)16 mm (0.6 inches)87%low
February Weather-8°C (18°F)40 mm (1.6 inches)88%moderate
March Weather0°C (31°F)27 mm (1.1 inches)83%moderate
April Weather4°C (40°F)57 mm (2.3 inches)78%very high
May Weather11°C (52°F)82 mm (3.2 inches)76%very high
June Weather16°C (61°F)73 mm (2.9 inches)78%very high
July Weather20°C (69°F)14 mm (0.5 inches)77%very high
August Weather19°C (67°F)23 mm (0.9 inches)71%very high
September Weather13°C (57°F)43 mm (1.7 inches)68%very high
October Weather5°C (42°F)38 mm (1.5 inches)72%moderate
November Weather1°C (34°F)30 mm (1.2 inches)84%moderate
December Weather-3°C (27°F)28 mm (1.1 inches)90%low

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