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September Weather in Cottonwood, United States

Last updated: June 24, 2025

In September, the average temperature in Cottonwood, United States is a pleasant 24°C (75°F). While daily highs can soar to a sweltering 39°C (103°F), nighttime lows may drop to a cool 4°C (40°F). Expect 20 mm (0.8 in) of precipitation over 4 days, and enjoy an average humidity level of 59% for a comfortable climate throughout the month.

September Temperature in Cottonwood

In September in Cottonwood, the average temperature is 24°C (75°F). Maximum temperatures can reach up to 39°C (103°F), while minimums can drop to a chilly 4°C (40°F). Be prepared for a wide range of temperatures suitable for both warm-day outings and cool nights when traveling.

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

The chart illustrates September temperature patterns in Cottonwood, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cottonwood, September typically has an average temperature of 24°C (75°F), with highs reaching up to 39°C (103°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec424450606880828175615243
Data source: Temperature data for Cottonwood 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 Cottonwood

In Cottonwood in September, the total precipitation amount is 20 mm (0.8 in) spread over a period of 4 days.

September Precipitation Trends in Cottonwood

The chart displays monthly precipitation patterns in Cottonwood, 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 Cottonwood, September typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec52546512143623220323043
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cottonwood

In Cottonwood in September humidity is 59%. With an average temperature of 24°C (75°F), this humidity feels like a warm embrace, making outdoor activities refreshing yet slightly sticky, perfect for leisurely strolls but reminding travelers to stay hydrated.

September Average Humidity in Cottonwood

This chart illustrates the average monthly humidity levels in Cottonwood, 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 Cottonwood is approximately 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%72%63%46%35%33%41%59%70%79%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cottonwood

In Cottonwood in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Cottonwood.

Maximum UV Index Levels in Cottonwood for September

The chart shows the monthly maximum UV Index (UVI) for Cottonwood 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 Cottonwood typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec489111212121110864
Data source: Cottonwood 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 Cottonwood Compares to Other Months

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

This table compares monthly weather conditions in Cottonwood, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)52 mm (2.0 inches)80%moderate
February Weather7°C (44°F)54 mm (2.1 inches)83%very high
March Weather10°C (50°F)65 mm (2.6 inches)72%very high
April Weather16°C (61°F)12 mm (0.5 inches)63%extreme
May Weather20°C (68°F)14 mm (0.5 inches)46%extreme
June Weather27°C (80°F)3 mm (0.1 inches)35%extreme
July Weather28°C (82°F)62 mm (2.4 inches)33%extreme
August Weather27°C (81°F)32 mm (1.3 inches)41%extreme
September Weather24°C (75°F)20 mm (0.8 inches)59%very high
October Weather16°C (62°F)32 mm (1.2 inches)70%very high
November Weather11°C (52°F)30 mm (1.2 inches)79%high
December Weather6°C (43°F)43 mm (1.7 inches)82%moderate

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