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September Weather in Collbran, United States

Last updated: June 24, 2025

In September, the average temperature in Collbran, United States hovers around 15°C (60°F). However, be prepared for a range of temperatures, with a minimum of -4°C (24°F) and a maximum of 31°C (89°F). During this month, expect about 40 mm (1.6 in) of precipitation over 7 days, and enjoy a comfortable average humidity of 53%.

September Temperature in Collbran

In September in Collbran, the average temperature is 15°C (60°F), with maximums reaching up to 31°C (89°F) and minimums dropping as low as -4°C (24°F). It's a great time to explore outdoor activities while being prepared for varying weather conditions.

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

The chart illustrates September temperature patterns in Collbran, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Collbran, September typically has an average temperature of 15°C (60°F), with highs reaching up to 31°C (89°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec202433405164706860423321
Data source: Temperature data for Collbran 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 Collbran

In Collbran in September, the precipitation amount is 40 mm (1.6 in) over a span of 7 days.

September Precipitation Trends in Collbran

The chart displays monthly precipitation patterns in Collbran, 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 Collbran, September typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec617386495626312240763861
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Collbran

In Collbran in September humidity is 53%. With average temperature 15°C (60°F), this humidity feels like a refreshing embrace, making it ideal for exploring the sights without feeling too hot or sticky.

September Average Humidity in Collbran

This chart illustrates the average monthly humidity levels in Collbran, 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 Collbran is approximately 53%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%81%74%58%47%39%39%53%72%84%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Collbran

In Collbran in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Collbran.

Maximum UV Index Levels in Collbran for September

The chart shows the monthly maximum UV Index (UVI) for Collbran 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 Collbran typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469111112121210754
Data source: Collbran 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 Collbran Compares to Other Months

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

This table compares monthly weather conditions in Collbran, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)61 mm (2.4 inches)90%moderate
February Weather-5°C (24°F)73 mm (2.9 inches)89%high
March Weather0°C (33°F)86 mm (3.4 inches)81%very high
April Weather4°C (40°F)49 mm (1.9 inches)74%extreme
May Weather11°C (51°F)56 mm (2.2 inches)58%extreme
June Weather18°C (64°F)26 mm (1.0 inches)47%extreme
July Weather21°C (70°F)31 mm (1.2 inches)39%extreme
August Weather20°C (68°F)22 mm (0.9 inches)39%extreme
September Weather15°C (60°F)40 mm (1.6 inches)53%very high
October Weather6°C (42°F)76 mm (3.0 inches)72%high
November Weather0°C (33°F)38 mm (1.5 inches)84%moderate
December Weather-6°C (22°F)61 mm (2.4 inches)90%moderate

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