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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 19°C (66°F). Expect a wide range, with minimum temperatures dipping to 2°C (35°F) and maximums reaching up to 34°C (93°F). You'll experience an average precipitation of 89 mm (3.5 in) spread over about 10 days, with humidity levels around 80% adding to the overall climate experience.

September Temperature in Mason

In September in Mason, the average temperature is 19°C (66°F). The maximum can reach 34°C (93°F), and the minimum can be as low as 2°C (35°F). This range makes Mason an ideal destination for travelers looking to experience a variety of temperatures and activities throughout the 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 19°C (66°F), with highs reaching up to 34°C (93°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec262737476070747265533932
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 precipitation amount is 89 mm (3.5 in) over a period of 10 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 89 mm (3.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec66707391126949665891157058
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 80%. With an average temperature of 19°C (66°F), this humidity feels like a warm, thick blanket wrapping around you, making outdoor activities feel more strenuous and sticky, which can ultimately dampen the experience of 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 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 Mason

In Mason 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 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24599101097542
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 Weather-3°C (26°F)66 mm (2.6 inches)88%low
February Weather-3°C (28°F)70 mm (2.8 inches)87%moderate
March Weather3°C (37°F)73 mm (2.9 inches)85%moderate
April Weather8°C (47°F)91 mm (3.6 inches)86%very high
May Weather15°C (60°F)126 mm (5.0 inches)80%very high
June Weather21°C (70°F)94 mm (3.7 inches)80%very high
July Weather24°C (75°F)96 mm (3.8 inches)80%very high
August Weather22°C (72°F)65 mm (2.5 inches)80%very high
September Weather19°C (66°F)89 mm (3.5 inches)80%high
October Weather12°C (54°F)115 mm (4.5 inches)84%moderate
November Weather4°C (39°F)69 mm (2.7 inches)89%moderate
December Weather0°C (32°F)57 mm (2.3 inches)86%low

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