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September Weather in Yarnell, United States

Last updated: June 24, 2025

In Yarnell, United States, the average temperature in September reaches a pleasant 26°C (79°F). However, be prepared for a temperature range that can dip to a cool 8°C (47°F) and soar up to a sizzling 40°C (103°F). Expect 27 mm (1.0 in) of precipitation spread over 3 days, accompanied by an average humidity level of 48%.

September Temperature in Yarnell

In September in Yarnell, the average temperature is a warm 26°C (79°F). Maximum temperatures can reach a scorching 40°C (103°F), while minimums can drop to a cool 8°C (47°F). Be prepared for a mix of warm days and cooler nights when traveling to Yarnell during this month.

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

The chart illustrates September temperature patterns in Yarnell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yarnell, September typically has an average temperature of 26°C (79°F), with highs reaching up to 40°C (103°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec464854647182858478665747
Data source: Temperature data for Yarnell 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 Yarnell

In Yarnell in September, the precipitation amount is 27 mm (1.0 in) over the course of 3 days.

September Precipitation Trends in Yarnell

The chart displays monthly precipitation patterns in Yarnell, 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 Yarnell, September typically receives around 27 mm (1.0 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec464746585703427232831
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Yarnell

In Yarnell in September humidity is 48%. With average temperature 26°C (79°F), this humidity feels like a warm, pleasant embrace that enhances the tropical atmosphere, making it a perfect setting for leisurely strolls and outdoor explorations.

September Average Humidity in Yarnell

This chart illustrates the average monthly humidity levels in Yarnell, 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 Yarnell 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 Yarnell

In Yarnell 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 Yarnell.

Maximum UV Index Levels in Yarnell for September

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

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

This table compares monthly weather conditions in Yarnell, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)46 mm (1.8 inches)77%moderate
February Weather9°C (48°F)47 mm (1.8 inches)80%high
March Weather12°C (55°F)46 mm (1.8 inches)68%very high
April Weather18°C (64°F)5 mm (0.2 inches)58%extreme
May Weather22°C (71°F)8 mm (0.3 inches)45%extreme
June Weather28°C (82°F)5 mm (0.2 inches)31%extreme
July Weather29°C (85°F)70 mm (2.8 inches)27%extreme
August Weather29°C (84°F)34 mm (1.3 inches)30%extreme
September Weather26°C (79°F)27 mm (1.0 inches)48%very high
October Weather19°C (66°F)23 mm (0.9 inches)59%very high
November Weather14°C (57°F)28 mm (1.1 inches)70%high
December Weather9°C (48°F)31 mm (1.2 inches)77%moderate

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