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September Weather in Prescott, United States

Last updated: June 24, 2025

In September, the average temperature in Prescott, United States is a pleasant 23°C (73°F). However, temperatures can vary significantly, with a minimum of 5°C (42°F) and a scorching maximum of 38°C (100°F). Expect some light precipitation, averaging 35 mm (1.4 in) over about 6 days throughout the month. With an average humidity of 48%, the climate remains comfortable for a variety of activities.

September Temperature in Prescott

In September in Prescott, the average temperature is 23°C (73°F). Maximums can reach 38°C (100°F), while minimums can drop to as low as 5°C (42°F). Be prepared for a range of temperatures, making it essential to pack both light clothing and warmer layers for your travels.

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

The chart illustrates September temperature patterns in Prescott, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Prescott, September typically has an average temperature of 23°C (73°F), with highs reaching up to 38°C (100°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec424349596678797873615243
Data source: Temperature data for Prescott 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 Prescott

In Prescott in September, the total precipitation amount is 35 mm (1.4 in) spread over a period of 6 days.

September Precipitation Trends in Prescott

The chart displays monthly precipitation patterns in Prescott, 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 Prescott, September typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec45475191451105635262531
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Prescott

In Prescott in September humidity is 48%. With an average temperature of 23°C (73°F), this humidity feels like a pleasant embrace, making it comfortable for traveling while allowing you to enjoy outdoor activities without feeling overly sticky or weighed down.

September Average Humidity in Prescott

This chart illustrates the average monthly humidity levels in Prescott, 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 Prescott is approximately 48%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%80%68%58%45%31%27%30%48%60%70%77%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Prescott

In Prescott 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 Prescott.

Maximum UV Index Levels in Prescott for September

The chart shows the monthly maximum UV Index (UVI) for Prescott 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 Prescott typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111212121110864
Data source: Prescott 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 Prescott Compares to Other Months

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

This table compares monthly weather conditions in Prescott, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)45 mm (1.8 inches)77%moderate
February Weather6°C (43°F)47 mm (1.8 inches)80%high
March Weather10°C (49°F)51 mm (2.0 inches)68%very high
April Weather15°C (59°F)9 mm (0.3 inches)58%extreme
May Weather19°C (66°F)14 mm (0.6 inches)45%extreme
June Weather25°C (78°F)5 mm (0.2 inches)31%extreme
July Weather26°C (80°F)110 mm (4.3 inches)27%extreme
August Weather26°C (78°F)56 mm (2.2 inches)30%extreme
September Weather23°C (73°F)35 mm (1.4 inches)48%very high
October Weather16°C (61°F)26 mm (1.0 inches)59%very high
November Weather11°C (52°F)25 mm (1.0 inches)70%high
December Weather6°C (43°F)31 mm (1.2 inches)77%moderate

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