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September Weather in Clinton, United States

Last updated: June 24, 2025

In September, the average temperature in Clinton, United States hovers around 14°C (57°F), offering a refreshing climate. Be prepared for temperature variations, as it can drop to a chilly -2°C (28°F) or peak at a warm 33°C (92°F). During this month, anticipate approximately 30 mm (1.2 in) of precipitation spread over 6 days, contributing to an average humidity level of 67%. Enjoy the balance of cool breezes and occasional rain!

September Temperature in Clinton

In September in Clinton, the average temperature is 14°C (57°F). The maximum can reach 33°C (92°F), and the minimum can be as low as -2°C (28°F). Be prepared for a wide range of temperatures when traveling, so pack accordingly!

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 14°C (57°F), with highs reaching up to 33°C (92°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec242132395059696757413327
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 total precipitation amount is 30 mm (1.2 in) spread across 6 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 30 mm (1.2 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec388448677370142130605559
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 67%. With an average temperature of 14°C (57°F), this humidity feels like a cool, refreshing mist that invigorates your senses, making it quite pleasant for traveling, though a light jacket is recommended as the moisture in the air can create a brisk atmosphere.

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 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%89%85%80%78%77%66%67%77%89%95%
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.
JanFebMarAprMayJunJulAugSepOctNovDec24689101098532
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-4°C (24°F)38 mm (1.5 inches)93%low
February Weather-6°C (21°F)84 mm (3.3 inches)92%moderate
March Weather0°C (33°F)48 mm (1.9 inches)89%high
April Weather4°C (40°F)67 mm (2.7 inches)85%very high
May Weather10°C (51°F)72 mm (2.9 inches)80%very high
June Weather15°C (60°F)70 mm (2.7 inches)78%very high
July Weather21°C (69°F)14 mm (0.5 inches)77%very high
August Weather20°C (67°F)21 mm (0.8 inches)66%very high
September Weather14°C (57°F)30 mm (1.2 inches)67%very high
October Weather5°C (42°F)59 mm (2.3 inches)77%moderate
November Weather0°C (33°F)55 mm (2.1 inches)89%moderate
December Weather-3°C (27°F)59 mm (2.3 inches)95%low

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