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September Weather in Mason, United States

Last updated: June 24, 2025

In September, the average temperature in Mason, United States hovers around 26°C (79°F). Temperatures can swing from a chilly 8°C (47°F) to a sweltering 38°C (101°F). Expect around 67 mm (2.6 in) of precipitation over the course of 7 days, with an average humidity level of 66%.

September Temperature in Mason

In September in Mason, the average temperature is 26°C (79°F). Maximum temperatures can reach as high as 38°C (101°F), while minimums can drop to as low as 8°C (47°F). Be prepared for warm days and cooler evenings when traveling to Mason during this month.

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

The chart illustrates September temperature patterns in Mason, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mason, September typically has an average temperature of 26°C (79°F), with highs reaching up to 38°C (101°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec495262687582858579695853
Data source: Temperature data for Mason 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 Mason

In Mason in September, the total precipitation amount is 67 mm (2.6 in) over a span of 7 days.

September Precipitation Trends in Mason

The chart displays monthly precipitation patterns in Mason, 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 Mason, September typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec3339626713245283767632636
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mason

In Mason in September, humidity is 66%. With an average temperature of 26°C (79°F), this humidity feels like a warm, enveloping blanket, making outdoor activities invigorating yet requiring occasional breaks in the shade to stay comfortable while traveling.

September Average Humidity in Mason

This chart illustrates the average monthly humidity levels in Mason, 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 Mason is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%78%77%78%82%78%69%63%66%73%84%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mason

In Mason 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 Mason.

Maximum UV Index Levels in Mason for September

The chart shows the monthly maximum UV Index (UVI) for Mason 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 Mason typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121110865
Data source: Mason 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 Mason Compares to Other Months

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

This table compares monthly weather conditions in Mason, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)33 mm (1.3 inches)78%moderate
February Weather11°C (52°F)39 mm (1.6 inches)78%high
March Weather17°C (62°F)62 mm (2.4 inches)77%very high
April Weather20°C (68°F)67 mm (2.6 inches)78%extreme
May Weather24°C (76°F)132 mm (5.2 inches)82%extreme
June Weather28°C (82°F)45 mm (1.8 inches)78%extreme
July Weather29°C (85°F)28 mm (1.1 inches)69%extreme
August Weather29°C (85°F)37 mm (1.5 inches)63%extreme
September Weather26°C (79°F)67 mm (2.6 inches)66%very high
October Weather20°C (69°F)63 mm (2.5 inches)73%very high
November Weather15°C (58°F)26 mm (1.0 inches)84%high
December Weather12°C (53°F)36 mm (1.4 inches)87%moderate

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