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September Weather in Running Springs, United States

Last updated: June 24, 2025

In Running Springs, United States, the average temperature in September hovers around 22°C (71°F). However, be prepared for fluctuations, as temperatures can dip to a brisk 7°C (44°F) or soar to a sizzling 39°C (102°F). During this month, expect a modest precipitation of 12 mm (0.5 in) over just 2 days, along with an average humidity level of 41%. Enjoy the pleasant weather!

September Temperature in Running Springs

In September in Running Springs, the average temperature is 22°C (71°F), with maximums reaching 39°C (102°F) and minimums dropping as low as 7°C (44°F). This climate makes Running Springs an ideal destination for travelers seeking both warm days and cooler nights.

September Weather in Running Springs: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Running Springs, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Running Springs, September typically has an average temperature of 22°C (71°F), with highs reaching up to 39°C (102°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec454649576172777771615345
Data source: Temperature data for Running Springs 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 Running Springs

In Running Springs in September, the precipitation amount is 12 mm (0.5 in) over the course of 2 days.

September Precipitation Trends in Running Springs

The chart displays monthly precipitation patterns in Running Springs, 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 Running Springs, September typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec4446422114529191291645
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Running Springs

In Running Springs in September, humidity is 41%. With an average temperature of 22°C (71°F), this humidity feels like a comfortable embrace, making it pleasant for exploring the sights without feeling overheated or sticky.

September Average Humidity in Running Springs

This chart illustrates the average monthly humidity levels in Running Springs, 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 Running Springs is approximately 41%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%69%57%45%34%29%28%42%54%68%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Running Springs

In Running Springs 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 Running Springs.

Maximum UV Index Levels in Running Springs for September

The chart shows the monthly maximum UV Index (UVI) for Running Springs 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 Running Springs typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469111112121110854
Data source: Running Springs 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 Running Springs Compares to Other Months

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

This table compares monthly weather conditions in Running Springs, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (46°F)44 mm (1.7 inches)76%moderate
February Weather8°C (46°F)46 mm (1.8 inches)80%high
March Weather9°C (49°F)42 mm (1.6 inches)69%very high
April Weather14°C (57°F)21 mm (0.8 inches)57%extreme
May Weather16°C (61°F)14 mm (0.6 inches)45%extreme
June Weather22°C (72°F)5 mm (0.2 inches)34%extreme
July Weather25°C (77°F)29 mm (1.1 inches)29%extreme
August Weather25°C (77°F)19 mm (0.8 inches)28%extreme
September Weather22°C (71°F)12 mm (0.5 inches)41%very high
October Weather16°C (61°F)8 mm (0.3 inches)54%very high
November Weather12°C (54°F)16 mm (0.6 inches)68%moderate
December Weather7°C (46°F)45 mm (1.8 inches)75%moderate

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