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September Weather in Summitville, United States

Last updated: June 24, 2025

The average temperature in Summitville, United States during September is 21°C (69°F). Expect a range from a cool 4°C (40°F) to a warm 33°C (91°F). Be prepared for some rain, as precipitation totals around 76 mm (3.0 in) over approximately 8 days. With an average humidity of 78%, it’s the perfect time to experience the climate!

September Temperature in Summitville

In September in Summitville, the average temperature is 21°C (69°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 4°C (40°F). This diverse range of temperatures makes it an ideal time for travelers to enjoy both warm daytime activities and cooler evening explorations.

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

The chart illustrates September temperature patterns in Summitville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Summitville, September typically has an average temperature of 21°C (69°F), with highs reaching up to 33°C (91°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec293242516473767369574135
Data source: Temperature data for Summitville 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 Summitville

In Summitville in September, the precipitation amount is 76 mm (3.0 in) spread over a duration of 8 days.

September Precipitation Trends in Summitville

The chart displays monthly precipitation patterns in Summitville, 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 Summitville, September typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec78891149413610910795761048471
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Summitville

In Summitville in September, humidity is 78%. With an average temperature of 21°C (69°F), this humidity feels like a warm embrace that clings to your skin, making outdoor activities feel more intense and leaving you yearning for refreshing breezes or a cool drink as you explore.

September Average Humidity in Summitville

This chart illustrates the average monthly humidity levels in Summitville, 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 Summitville is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%87%81%82%81%79%78%81%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Summitville

In Summitville 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 Summitville.

Maximum UV Index Levels in Summitville for September

The chart shows the monthly maximum UV Index (UVI) for Summitville 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 Summitville typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098642
Data source: Summitville 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 Summitville Compares to Other Months

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

This table compares monthly weather conditions in Summitville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)78 mm (3.1 inches)85%moderate
February Weather0°C (32°F)89 mm (3.5 inches)85%moderate
March Weather5°C (42°F)114 mm (4.5 inches)86%high
April Weather11°C (52°F)94 mm (3.7 inches)87%very high
May Weather18°C (64°F)136 mm (5.4 inches)81%very high
June Weather23°C (73°F)109 mm (4.3 inches)82%extreme
July Weather24°C (76°F)107 mm (4.2 inches)81%very high
August Weather23°C (74°F)95 mm (3.7 inches)79%very high
September Weather21°C (69°F)76 mm (3.0 inches)78%very high
October Weather14°C (57°F)103 mm (4.1 inches)81%high
November Weather5°C (42°F)84 mm (3.3 inches)89%moderate
December Weather2°C (36°F)70 mm (2.8 inches)86%low

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