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September Weather in Clearbrook, United States

Last updated: June 24, 2025

In September, the average temperature in Clearbrook, United States hovers around 15°C (59°F), bringing a mix of mild and brisk days. Expect lows of -2°C (28°F) and highs reaching up to 30°C (86°F). With an average humidity of 77%, you might feel the moisture in the air. Prepare for 106 mm (4.2 in) of precipitation over about 12 days, so don’t forget your umbrella while enjoying the season!

September Temperature in Clearbrook

In September, in Clearbrook, the average temperature is 15°C (59°F). Maximums can reach 30°C (86°F) and minimums can be as low as -2°C (28°F). This varied climate makes it essential for travelers to pack layers to stay comfortable throughout the day.

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

The chart illustrates September temperature patterns in Clearbrook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clearbrook, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (86°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec9826375467716758432616
Data source: Temperature data for Clearbrook 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 Clearbrook

In Clearbrook in September, the precipitation amount is 106 mm (4.2 in), occurring over a span of 12 days.

September Precipitation Trends in Clearbrook

The chart displays monthly precipitation patterns in Clearbrook, 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 Clearbrook, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec2124275651876977106832943
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Clearbrook

In Clearbrook in September, humidity is 77%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making it essential to stay hydrated and choose light, breathable clothing for comfortable travel.

September Average Humidity in Clearbrook

This chart illustrates the average monthly humidity levels in Clearbrook, 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 Clearbrook is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%92%85%81%75%79%77%78%77%79%86%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Clearbrook

In Clearbrook 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 Clearbrook.

Maximum UV Index Levels in Clearbrook for September

The chart shows the monthly maximum UV Index (UVI) for Clearbrook 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 Clearbrook typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245789987532
Data source: Clearbrook 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 Clearbrook Compares to Other Months

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

This table compares monthly weather conditions in Clearbrook, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-13°C (9°F)21 mm (0.8 inches)90%low
February Weather-13°C (8°F)24 mm (0.9 inches)92%moderate
March Weather-3°C (27°F)27 mm (1.1 inches)85%moderate
April Weather3°C (37°F)56 mm (2.2 inches)81%high
May Weather12°C (55°F)51 mm (2.0 inches)75%very high
June Weather19°C (67°F)87 mm (3.4 inches)79%very high
July Weather22°C (71°F)69 mm (2.7 inches)76%very high
August Weather19°C (67°F)77 mm (3.0 inches)78%very high
September Weather15°C (59°F)106 mm (4.2 inches)77%high
October Weather6°C (43°F)83 mm (3.3 inches)79%moderate
November Weather-4°C (26°F)29 mm (1.1 inches)86%moderate
December Weather-9°C (16°F)43 mm (1.7 inches)86%low

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