nomadseason

September Weather in Afton, United States

Last updated: June 24, 2025

In September, the average temperature in Afton, United States is a comfortable 20°C (69°F). Visitors can expect a minimum temperature of 6°C (42°F) and a maximum of 33°C (91°F). During this month, the area receives approximately 132 mm (5.2 in) of precipitation over 9 days, contributing to an average humidity level of 73%. Enjoy this blend of warmth and rejuvenating rain while exploring!

September Temperature in Afton

In September in Afton, the average temperature is 20°C (69°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 6°C (42°F). This pleasant climate makes Afton an ideal destination for travelers seeking a comfortable getaway during this time of year.

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 20°C (69°F), with highs reaching up to 33°C (91°F) and lows dropping to around 6°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec232541506275777468523932
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 132 mm (5.2 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 132 mm (5.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec3936896717011484961321454036
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 73%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making travel slightly sticky but ultimately comfortable as long as you stay hydrated and take breaks in the shade.

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 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
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.
JanFebMarAprMayJunJulAugSepOctNovDec356810111098643
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-5°C (24°F)39 mm (1.5 inches)78%moderate
February Weather-4°C (26°F)36 mm (1.4 inches)80%moderate
March Weather5°C (41°F)88 mm (3.5 inches)77%high
April Weather10°C (50°F)67 mm (2.7 inches)77%very high
May Weather17°C (63°F)170 mm (6.7 inches)77%very high
June Weather24°C (75°F)114 mm (4.5 inches)81%extreme
July Weather25°C (77°F)84 mm (3.3 inches)81%very high
August Weather23°C (74°F)96 mm (3.8 inches)77%very high
September Weather20°C (69°F)132 mm (5.2 inches)73%very high
October Weather11°C (53°F)145 mm (5.7 inches)75%high
November Weather4°C (39°F)40 mm (1.6 inches)85%moderate
December Weather0°C (32°F)36 mm (1.4 inches)83%moderate

Compare Afton's Climate with Cities Worldwide