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September Weather in Clinton, United States

Last updated: June 24, 2025

In September, the average temperature in Clinton, United States is a comfortable 23°C (73°F). However, be prepared for a range, as temperatures can dip to a chilly 9°C (48°F) and soar up to a sizzling 36°C (97°F). Expect 99 mm (3.9 in) of precipitation spread over 9 days, contributing to an average humidity of 76%.

September Temperature in Clinton

In September in Clinton, the average temperature is 23°C (73°F). Maximums can reach 36°C (97°F), while minimums can drop as low as 9°C (48°F). This diverse temperature range makes it essential for travelers to pack both light and warm clothing to enjoy their visit comfortably.

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 (73°F), with highs reaching up to 36°C (97°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec414652596975787773634845
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 99 mm (3.9 in) during a span of 9 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 99 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1041851621431171221321409912081141
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 76%. With an average temperature of 23°C (73°F), this humidity feels like a warm, enveloping blanket, making outdoor activities feel more intense and prompting travelers to seek shade or cool breaks more frequently.

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 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%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.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
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 Weather5°C (41°F)104 mm (4.1 inches)86%moderate
February Weather8°C (46°F)185 mm (7.3 inches)86%high
March Weather11°C (52°F)162 mm (6.4 inches)86%very high
April Weather15°C (59°F)142 mm (5.6 inches)82%very high
May Weather20°C (69°F)117 mm (4.6 inches)85%extreme
June Weather24°C (75°F)122 mm (4.8 inches)85%extreme
July Weather26°C (79°F)132 mm (5.2 inches)83%extreme
August Weather25°C (77°F)140 mm (5.5 inches)76%very high
September Weather23°C (73°F)99 mm (3.9 inches)76%very high
October Weather17°C (63°F)120 mm (4.7 inches)80%high
November Weather9°C (49°F)81 mm (3.2 inches)88%moderate
December Weather7°C (45°F)141 mm (5.6 inches)88%moderate

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