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September Weather in Afton, United States

Last updated: June 24, 2025

In September, the average temperature in Afton, United States is a cool 11°C (52°F). Expect temperature fluctuations with a minimum of -11°C (13°F) and a maximum soaring to 29°C (84°F). The month sees about 51 mm (2.0 in) of precipitation spread over 7 days, contributing to an average humidity of 52%.

September Temperature in Afton

In September in Afton, the average temperature is 11°C (52°F). The maximum can reach 29°C (84°F), while the minimum can drop as low as -11°C (13°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates September temperature patterns in Afton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Afton, September typically has an average temperature of 11°C (52°F), with highs reaching up to 29°C (84°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec202130344155646152362620
Data source: Temperature data for Afton 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 Afton

In Afton in September, the precipitation amount is 51 mm (2.0 in) over a period of 7 days.

September Precipitation Trends in Afton

The chart displays monthly precipitation patterns in Afton, 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 Afton, September typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec7511566878243203351607372
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Afton

In Afton in September humidity is 52%. With an average temperature of 11°C (52°F), this humidity feels like a refreshing yet slightly cool embrace, perfect for leisurely strolls and outdoor sightseeing, though you might want to bring a light jacket for comfort.

September Average Humidity in Afton

This chart illustrates the average monthly humidity levels in Afton, 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 Afton is approximately 52%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec95%95%90%81%71%64%59%49%52%69%86%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Afton

In Afton in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Afton.

Maximum UV Index Levels in Afton for September

The chart shows the monthly maximum UV Index (UVI) for Afton 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 Afton typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35810121211119653
Data source: Afton 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 Afton Compares to Other Months

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

This table compares monthly weather conditions in Afton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (21°F)75 mm (2.9 inches)95%moderate
February Weather-6°C (21°F)115 mm (4.5 inches)95%moderate
March Weather-1°C (30°F)66 mm (2.6 inches)90%very high
April Weather1°C (34°F)86 mm (3.4 inches)81%very high
May Weather5°C (41°F)82 mm (3.2 inches)71%extreme
June Weather13°C (55°F)43 mm (1.7 inches)64%extreme
July Weather18°C (64°F)20 mm (0.8 inches)59%extreme
August Weather16°C (62°F)33 mm (1.3 inches)49%extreme
September Weather11°C (52°F)51 mm (2.0 inches)52%very high
October Weather2°C (37°F)60 mm (2.4 inches)69%high
November Weather-3°C (26°F)73 mm (2.9 inches)86%moderate
December Weather-7°C (20°F)72 mm (2.8 inches)91%moderate

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