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September Weather in Clayton, United States

Last updated: June 24, 2025

In Clayton, United States, the average temperature in September hovers around 21°C (71°F). Expect a minimum of 6°C (44°F) and a maximum soaring up to 34°C (94°F). You'll experience 90 mm (3.5 in) of precipitation over approximately 7 days, accompanied by an average humidity level of 76%. Stay prepared for both warm days and the occasional shower!

September Temperature in Clayton

In September in Clayton, the average temperature is 21°C (71°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as 6°C (44°F). This weather makes Clayton an ideal destination for travelers seeking pleasant temperatures, but also a reminder to prepare for a range of conditions.

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

The chart illustrates September temperature patterns in Clayton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clayton, September typically has an average temperature of 21°C (71°F), with highs reaching up to 34°C (94°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec283143526575787570564136
Data source: Temperature data for Clayton 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 Clayton

In Clayton in September, the precipitation amount is 90 mm (3.5 in) over the course of 7 days.

September Precipitation Trends in Clayton

The chart displays monthly precipitation patterns in Clayton, 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 Clayton, September typically receives around 90 mm (3.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec62641231041621198998901045947
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Clayton

In Clayton in September humidity is 76%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket, making traveling both refreshing and a bit exhausting, as the air clings to your skin and you often find yourself reaching for water to stay hydrated.

September Average Humidity in Clayton

This chart illustrates the average monthly humidity levels in Clayton, 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 Clayton is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Clayton

In Clayton 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 Clayton.

Maximum UV Index Levels in Clayton for September

The chart shows the monthly maximum UV Index (UVI) for Clayton 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 Clayton typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111198643
Data source: Clayton 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 Clayton Compares to Other Months

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

This table compares monthly weather conditions in Clayton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)62 mm (2.4 inches)82%moderate
February Weather-1°C (31°F)64 mm (2.5 inches)80%moderate
March Weather6°C (44°F)123 mm (4.8 inches)80%high
April Weather11°C (52°F)104 mm (4.1 inches)80%very high
May Weather18°C (65°F)162 mm (6.4 inches)82%very high
June Weather24°C (75°F)119 mm (4.7 inches)83%extreme
July Weather26°C (78°F)88 mm (3.5 inches)81%extreme
August Weather24°C (75°F)98 mm (3.9 inches)80%very high
September Weather21°C (71°F)90 mm (3.5 inches)76%very high
October Weather14°C (57°F)104 mm (4.1 inches)76%high
November Weather5°C (42°F)59 mm (2.3 inches)85%moderate
December Weather2°C (36°F)47 mm (1.9 inches)86%moderate

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