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September Weather in Cottonwood, United States

Last updated: June 24, 2025

In September, the average temperature in Cottonwood, United States hovers around 18°C (65°F), with a minimum dipping to 2°C (35°F) and a maximum soaring to 33°C (92°F). Expect about 111 mm (4.4 in) of precipitation over 9 days, contributing to an average humidity level of 82%.

September Temperature in Cottonwood

In September in Cottonwood, the average temperature is 18°C (65°F). The maximum can reach 33°C (92°F), while the minimum can drop as low as 2°C (35°F). This diverse climate makes Cottonwood a great destination for travelers seeking both warmth and cool, refreshing conditions.

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 18°C (65°F), with highs reaching up to 33°C (92°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec171633435972747164483425
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 precipitation amount is 111 mm (4.4 in) over the course of 9 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 111 mm (4.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec24256179117100107129111912941
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 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and 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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%89%81%82%76%81%82%83%82%82%87%84%
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 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 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3558910998532
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 Weather-8°C (17°F)24 mm (1.0 inches)85%moderate
February Weather-9°C (17°F)25 mm (1.0 inches)89%moderate
March Weather0°C (33°F)61 mm (2.4 inches)81%moderate
April Weather6°C (43°F)79 mm (3.1 inches)82%very high
May Weather15°C (59°F)117 mm (4.6 inches)76%very high
June Weather22°C (72°F)100 mm (3.9 inches)81%very high
July Weather23°C (74°F)107 mm (4.2 inches)82%very high
August Weather21°C (71°F)128 mm (5.1 inches)83%very high
September Weather18°C (65°F)111 mm (4.4 inches)82%very high
October Weather9°C (48°F)91 mm (3.6 inches)82%moderate
November Weather1°C (34°F)29 mm (1.1 inches)87%moderate
December Weather-4°C (25°F)41 mm (1.6 inches)84%low

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