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September Weather in East Valley, United States

Last updated: June 24, 2025

In East Valley, United States, the average temperature in September hovers around 17°C (62°F), with a minimum dropping to -2°C (29°F) and a maximum soaring to 34°C (94°F). Expect light rain, with precipitation amounts averaging 9 mm (0.4 in) over just 2 days. The weather is complemented by an average humidity level of 41%, making it a pleasantly varied month!

September Temperature in East Valley

In September in East Valley, the average temperature is 17°C (62°F). Maximums can reach up to 34°C (94°F), while minimums can dip as low as -2°C (29°F). Be prepared for a wide range of temperatures when planning your travel to East Valley in September.

September Weather in East Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in East Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In East Valley, September typically has an average temperature of 17°C (62°F), with highs reaching up to 34°C (94°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec323135435163717062494031
Data source: Temperature data for East Valley 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 East Valley

In East Valley in September, the precipitation amount is 9 mm (0.4 in) over the course of 2 days.

September Precipitation Trends in East Valley

The chart displays monthly precipitation patterns in East Valley, 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 East Valley, September typically receives around 9 mm (0.4 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec123125964745811109385493
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in East Valley

In East Valley in September humidity is 41%. With an average temperature of 17°C (62°F), this humidity feels like a fresh, invigorating breeze that makes exploring the area comfortable and enjoyable for travelers.

September Average Humidity in East Valley

This chart illustrates the average monthly humidity levels in East Valley, 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 East Valley is approximately 41%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%87%84%78%64%56%44%34%41%60%81%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in East Valley

In East Valley 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 East Valley.

Maximum UV Index Levels in East Valley for September

The chart shows the monthly maximum UV Index (UVI) for East Valley 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 East Valley typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110754
Data source: East Valley 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 East Valley Compares to Other Months

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

This table compares monthly weather conditions in East Valley, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)123 mm (4.8 inches)85%moderate
February Weather0°C (32°F)125 mm (4.9 inches)87%high
March Weather2°C (35°F)96 mm (3.8 inches)84%very high
April Weather6°C (43°F)47 mm (1.8 inches)78%very high
May Weather11°C (52°F)45 mm (1.8 inches)64%extreme
June Weather17°C (63°F)8 mm (0.3 inches)56%extreme
July Weather22°C (71°F)11 mm (0.4 inches)44%extreme
August Weather21°C (70°F)10 mm (0.4 inches)34%extreme
September Weather17°C (62°F)9 mm (0.4 inches)41%very high
October Weather9°C (49°F)38 mm (1.5 inches)60%high
November Weather5°C (41°F)54 mm (2.1 inches)81%moderate
December Weather-1°C (31°F)93 mm (3.6 inches)82%moderate

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