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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 refreshing 25°C (78°F). Expect a range from a cool 10°C (50°F) at its lowest to a blazing 38°C (102°F) at its peak. During this month, you can anticipate 92 mm (3.6 in) of precipitation over about 7 days, accompanied by an average humidity of 63%. Perfect for planning your activities!

September Temperature in Prescott

In September in Prescott, the average temperature is 25°C (78°F). Maximum temperatures can reach 38°C (102°F), while the minimum can drop to as low as 10°C (50°F). It's a great time to explore Prescott, so be sure to pack accordingly for both warm days and cooler nights!

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 25°C (78°F), with highs reaching up to 38°C (102°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec454858637280828277665450
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 precipitation amount is 92 mm (3.6 in) over the course of 7 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 92 mm (3.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec105165157195166108971049210178146
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 63%. With an average temperature of 25°C (78°F), this humidity feels like a warm embrace, making travel both invigorating and slightly stifling, as you navigate the balance between enjoying the outdoor sights and seeking relief in shaded areas.

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 63%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%78%79%81%77%72%65%63%70%82%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec468101112111110864
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 Weather7°C (45°F)105 mm (4.1 inches)82%moderate
February Weather9°C (48°F)165 mm (6.5 inches)80%high
March Weather15°C (58°F)157 mm (6.2 inches)78%very high
April Weather17°C (63°F)195 mm (7.7 inches)79%very high
May Weather22°C (73°F)166 mm (6.5 inches)81%extreme
June Weather27°C (80°F)108 mm (4.2 inches)77%extreme
July Weather28°C (83°F)97 mm (3.8 inches)72%extreme
August Weather28°C (82°F)104 mm (4.1 inches)65%extreme
September Weather25°C (78°F)92 mm (3.6 inches)63%very high
October Weather19°C (66°F)101 mm (4.0 inches)70%very high
November Weather12°C (54°F)78 mm (3.1 inches)82%high
December Weather10°C (50°F)146 mm (5.7 inches)88%moderate

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