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September Weather in Valle Vista, United States

Last updated: June 24, 2025

In Valle Vista, United States, the average temperature in September hovers around 25°C (78°F). However, temperatures can vary widely, with a minimum of 7°C (44°F) and soaring up to a maximum of 40°C (104°F). Expect some light rainfall, with an average precipitation of 8 mm (0.3 in) over 2 days. Additionally, the average humidity sits at a comfortable 48%, making it an inviting time to visit!

September Temperature in Valle Vista

In September in Valle Vista, the average temperature is 25°C (78°F). Maximums can reach up to 40°C (104°F), while minimums can drop as low as 7°C (44°F). It's advisable to pack a variety of clothing to accommodate the warm days and cooler nights when traveling there.

September Weather in Valle Vista: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Valle Vista, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Valle Vista, September typically has an average temperature of 25°C (78°F), with highs reaching up to 40°C (104°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec434552627082858577635343
Data source: Temperature data for Valle Vista 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 Valle Vista

In Valle Vista in September, the precipitation amount is 8 mm (0.3 in) over the course of 2 days.

September Precipitation Trends in Valle Vista

The chart displays monthly precipitation patterns in Valle Vista, 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 Valle Vista, September typically receives around 8 mm (0.3 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec31334198123128182421
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Valle Vista

In Valle Vista in September humidity is 48%. With an average temperature of 25°C (78°F), this humidity feels like a comfortable embrace, making it a pleasant time for exploring the area.

September Average Humidity in Valle Vista

This chart illustrates the average monthly humidity levels in Valle Vista, 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 Valle Vista 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 Valle Vista

In Valle Vista 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 Valle Vista.

Maximum UV Index Levels in Valle Vista for September

The chart shows the monthly maximum UV Index (UVI) for Valle Vista 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 Valle Vista typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479101112121110854
Data source: Valle Vista 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 Valle Vista Compares to Other Months

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

This table compares monthly weather conditions in Valle Vista, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)31 mm (1.2 inches)77%moderate
February Weather7°C (45°F)33 mm (1.3 inches)80%high
March Weather11°C (52°F)41 mm (1.6 inches)68%very high
April Weather17°C (63°F)9 mm (0.4 inches)58%very high
May Weather21°C (70°F)8 mm (0.3 inches)45%extreme
June Weather28°C (82°F)1 mm (0.0 inches)31%extreme
July Weather30°C (86°F)23 mm (0.9 inches)27%extreme
August Weather29°C (85°F)12 mm (0.5 inches)30%extreme
September Weather25°C (78°F)8 mm (0.3 inches)48%very high
October Weather17°C (63°F)18 mm (0.7 inches)59%very high
November Weather12°C (54°F)24 mm (0.9 inches)70%moderate
December Weather6°C (43°F)21 mm (0.8 inches)77%moderate

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