September Weather in Birch Run, United States

Last updated: June 24, 2025

In September, the average temperature in Birch Run, United States is a pleasant 18°C (65°F). However, be prepared for a range, as temperatures can dip as low as 1°C (34°F) and soar up to 34°C (94°F). Expect 93 mm (3.7 in) of precipitation over approximately 11 days, contributing to an average humidity of 80%.

September Temperature in Birch Run

In September in Birch Run, the average temperature is 18°C (65°F), with maximums reaching up to 34°C (94°F) and minimums dipping as low as 1°C (34°F). Be prepared for a range of temperatures during your travels, bringing both lightweight clothing for the heat and warmer layers for the cooler moments.

September Weather in Birch Run: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Birch Run, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Birch Run, September typically has an average temperature of 18°C (65°F), with highs reaching up to 34°C (94°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec252635465969747164533831
Data source: Temperature data for Birch Run 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 Birch Run

In Birch Run in September, the precipitation amount is 93 mm (3.7 in) over the course of 11 days, indicating that rain is expected to be fairly frequent during that time.

September Precipitation Trends in Birch Run

The chart displays monthly precipitation patterns in Birch Run, 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 Birch Run, September typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec606362921041096984931086355
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Birch Run

In Birch Run in September, humidity is 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

September Average Humidity in Birch Run

This chart illustrates the average monthly humidity levels in Birch Run, 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 Birch Run is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Birch Run

In Birch Run 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 Birch Run.

Maximum UV Index Levels in Birch Run for September

The chart shows the monthly maximum UV Index (UVI) for Birch Run 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 Birch Run typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Birch Run 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 Birch Run Compares to Other Months

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

This table compares monthly weather conditions in Birch Run, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)60 mm (2.4 inches)88%low
February Weather-3°C (27°F)63 mm (2.5 inches)87%moderate
March Weather2°C (36°F)62 mm (2.5 inches)85%moderate
April Weather8°C (46°F)91 mm (3.6 inches)86%very high
May Weather15°C (59°F)104 mm (4.1 inches)80%very high
June Weather21°C (69°F)109 mm (4.3 inches)80%very high
July Weather23°C (74°F)69 mm (2.7 inches)80%very high
August Weather22°C (72°F)84 mm (3.3 inches)80%very high
September Weather18°C (65°F)93 mm (3.7 inches)80%high
October Weather11°C (53°F)108 mm (4.3 inches)84%moderate
November Weather3°C (38°F)63 mm (2.5 inches)89%moderate
December Weather0°C (32°F)55 mm (2.2 inches)86%low

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