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September Weather in Colby, United States

Last updated: June 24, 2025

In September, the average temperature in Colby, United States hovers around 16°C (61°F). However, be prepared for a range that can dip to a chilly 0°C (32°F) and soar to a warm 32°C (90°F). During this month, anticipate 90 mm (3.5 in) of precipitation spread over 11 days, resulting in a humidity level of roughly 80%. Enjoy the diverse weather while planning your activities!

September Temperature in Colby

In September in Colby, the average temperature is 16°C (61°F). The maximum can reach 32°C (90°F) and the minimum can be as low as 0°C (32°F). Be prepared for a diverse range of weather conditions while traveling, as it can vary significantly from warm days to chilly nights.

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

The chart illustrates September temperature patterns in Colby, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Colby, September typically has an average temperature of 16°C (61°F), with highs reaching up to 32°C (90°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec161631415667716761463222
Data source: Temperature data for Colby 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 Colby

In Colby in September, the total precipitation amounts to 90 mm (3.5 in) over the course of 11 days.

September Precipitation Trends in Colby

The chart displays monthly precipitation patterns in Colby, 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 Colby, September typically receives around 90 mm (3.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec34525498118107127133901205154
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Colby

In Colby in September, humidity is 80%. With an average temperature of 16°C (61°F), this humidity feels like a warm blanket wrapped around you, making sightseeing a sweat-inducing challenge but also lending a lush vibrancy to the surroundings that can enhance your travel experience.

September Average Humidity in Colby

This chart illustrates the average monthly humidity levels in Colby, 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 Colby is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%86%85%79%80%80%78%80%84%89%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Colby

In Colby 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 Colby.

Maximum UV Index Levels in Colby for September

The chart shows the monthly maximum UV Index (UVI) for Colby 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 Colby typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457810997532
Data source: Colby 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 Colby Compares to Other Months

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

This table compares monthly weather conditions in Colby, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)34 mm (1.3 inches)88%low
February Weather-9°C (17°F)52 mm (2.1 inches)89%moderate
March Weather-1°C (31°F)54 mm (2.1 inches)86%moderate
April Weather5°C (42°F)98 mm (3.9 inches)85%high
May Weather14°C (57°F)118 mm (4.7 inches)79%very high
June Weather19°C (67°F)107 mm (4.2 inches)80%very high
July Weather22°C (71°F)127 mm (5.0 inches)80%very high
August Weather19°C (67°F)133 mm (5.3 inches)78%very high
September Weather16°C (61°F)90 mm (3.5 inches)80%high
October Weather8°C (47°F)120 mm (4.7 inches)84%moderate
November Weather0°C (32°F)51 mm (2.0 inches)89%moderate
December Weather-5°C (23°F)54 mm (2.1 inches)85%low

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