nomadseason

September Weather in Afton, United States

Last updated: June 24, 2025

In September, the average temperature in Afton, United States is a comfortable 17°C (63°F). However, temperatures can vary significantly, with minimums plummeting to 0°C (32°F) and maximums soaring up to 31°C (89°F). Expect about 102 mm (4.0 in) of precipitation over 9 days, accompanied by an average humidity level of 78%, creating a unique and varied climate experience.

September Temperature in Afton

In September in Afton, the average temperature is 17°C (63°F). Maximum temperatures can reach 31°C (89°F), while minimum temperatures can drop as low as 0°C (32°F). Be sure to pack versatile clothing to enjoy the varying weather during your travels.

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 17°C (63°F), with highs reaching up to 31°C (89°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec252834465766716963533830
Data source: Temperature data for Afton generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Afton

In Afton in September, the total precipitation amount is 102 mm (4.0 in) over a span of 9 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 102 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec79939012212811313411910214810194
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Afton

In Afton in September, humidity is 78%. With an average temperature of 17°C (63°F), this humidity feels like a warm, enveloping blanket, making traveling slightly uncomfortable as you navigate the sticky air, prompting the need for frequent breaks in cooler, shaded areas.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346910101098642
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-4°C (25°F)79 mm (3.1 inches)90%moderate
February Weather-2°C (28°F)93 mm (3.7 inches)90%moderate
March Weather1°C (34°F)90 mm (3.6 inches)87%high
April Weather8°C (46°F)122 mm (4.8 inches)88%very high
May Weather14°C (58°F)128 mm (5.0 inches)82%very high
June Weather19°C (66°F)113 mm (4.4 inches)79%very high
July Weather22°C (71°F)134 mm (5.3 inches)78%very high
August Weather21°C (69°F)119 mm (4.7 inches)76%very high
September Weather17°C (63°F)102 mm (4.0 inches)78%very high
October Weather11°C (53°F)148 mm (5.8 inches)84%high
November Weather3°C (38°F)101 mm (4.0 inches)89%moderate
December Weather-1°C (31°F)93 mm (3.7 inches)86%low

Compare Afton's Climate with Cities Worldwide