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September Weather in Clinton, United States

Last updated: June 24, 2025

In Clinton, United States, the average temperature in September is a pleasant 17°C (63°F). However, be prepared for temperature fluctuations, with minimums dipping to 0°C (32°F) and maximums soaring up to 32°C (91°F). During this month, expect around 94 mm (3.7 in) of precipitation spread over 10 days, and high average humidity levels of 78%.

September Temperature in Clinton

In September in Clinton, the average temperature is 17°C (63°F). Maximum temperatures can reach 32°C (91°F), while minimums can drop as low as 0°C (32°F). This makes Clinton an ideal destination for travelers seeking a pleasant mix of warm and cool weather.

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

The chart illustrates September temperature patterns in Clinton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clinton, September typically has an average temperature of 17°C (63°F), with highs reaching up to 32°C (91°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec242733455766716962523729
Data source: Temperature data for Clinton 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 Clinton

In Clinton in September, the precipitation amount is 94 mm (3.7 in) over a duration of 10 days.

September Precipitation Trends in Clinton

The chart displays monthly precipitation patterns in Clinton, 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 Clinton, September typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec971069912513512217513694175117110
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Clinton

In Clinton 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 Clinton

This chart illustrates the average monthly humidity levels in Clinton, 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 Clinton 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 Clinton

In Clinton 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 Clinton.

Maximum UV Index Levels in Clinton for September

The chart shows the monthly maximum UV Index (UVI) for Clinton 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 Clinton typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998632
Data source: Clinton 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 Clinton Compares to Other Months

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

This table compares monthly weather conditions in Clinton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)97 mm (3.8 inches)90%moderate
February Weather-3°C (27°F)106 mm (4.2 inches)90%moderate
March Weather1°C (33°F)99 mm (3.9 inches)87%high
April Weather7°C (45°F)125 mm (4.9 inches)88%very high
May Weather14°C (57°F)135 mm (5.3 inches)82%very high
June Weather19°C (66°F)122 mm (4.8 inches)79%very high
July Weather22°C (71°F)175 mm (6.9 inches)78%very high
August Weather20°C (69°F)136 mm (5.4 inches)76%very high
September Weather17°C (63°F)94 mm (3.7 inches)78%very high
October Weather11°C (52°F)175 mm (6.9 inches)84%high
November Weather3°C (38°F)117 mm (4.6 inches)89%moderate
December Weather-1°C (30°F)110 mm (4.3 inches)86%low

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