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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 23°C (74°F). Expect a range between a cool 9°C (49°F) at night and a warm 36°C (96°F) during the day. With an average humidity of 75%, you may feel the air’s richness, complemented by a precipitation amount of 90 mm (3.5 in) spread over 6 days throughout the month. Prepare accordingly for both sunshine and showers!

September Temperature in Clinton

In September in Clinton, the average temperature is 23°C (74°F). Maximums can reach up to 36°C (96°F), while minimums can drop as low as 9°C (49°F). Travelers should be prepared for warm days and cooler nights.

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 23°C (74°F), with highs reaching up to 36°C (96°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec384251597077817874624844
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 reaches 90 mm (3.5 in) over the course of 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 90 mm (3.5 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec1091531681471401101099590117106108
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 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

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 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111111109753
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 Weather3°C (38°F)109 mm (4.3 inches)86%moderate
February Weather5°C (42°F)153 mm (6.0 inches)84%high
March Weather11°C (52°F)168 mm (6.6 inches)84%high
April Weather15°C (59°F)147 mm (5.8 inches)80%very high
May Weather21°C (70°F)140 mm (5.5 inches)82%extreme
June Weather25°C (78°F)110 mm (4.3 inches)83%extreme
July Weather27°C (81°F)109 mm (4.3 inches)79%extreme
August Weather26°C (78°F)95 mm (3.7 inches)76%very high
September Weather23°C (74°F)90 mm (3.5 inches)75%very high
October Weather17°C (62°F)117 mm (4.6 inches)74%high
November Weather9°C (48°F)106 mm (4.2 inches)85%moderate
December Weather6°C (44°F)108 mm (4.2 inches)88%moderate

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