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September Weather in Spring Valley, United States

Last updated: June 24, 2025

In Spring Valley, United States, the average temperature in September is a warm 27°C (81°F). Expect the mercury to dip as low as 10°C (50°F) and rise to a sizzling 43°C (110°F). While you're soaking up the sun, be prepared for a brief 5 mm (0.2 in) of precipitation spread over 1 day, and enjoy the typically low average humidity of 41%.

September Temperature in Spring Valley

In September in Spring Valley, the average temperature is 27°C (81°F). Maximums can reach 43°C (110°F), while minimums can drop to as low as 10°C (50°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates September temperature patterns in Spring Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Spring Valley, September typically has an average temperature of 27°C (81°F), with highs reaching up to 43°C (110°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec464956667386908981665646
Data source: Temperature data for Spring 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 Spring Valley

In Spring Valley in September, the precipitation amount is 5 mm (0.2 in) over a duration of 1 day.

September Precipitation Trends in Spring Valley

The chart displays monthly precipitation patterns in Spring 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 Spring Valley, September typically receives around 5 mm (0.2 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec1922196811811541317
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Spring Valley

In Spring Valley in September humidity is 41%. With an average temperature of 27°C (81°F), this humidity feels like a warm embrace, making it comfortable for exploring outdoor attractions without overwhelming discomfort.

September Average Humidity in Spring Valley

This chart illustrates the average monthly humidity levels in Spring 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 Spring Valley is approximately 41%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%69%57%45%34%29%28%42%54%68%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Spring Valley

In Spring 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 Spring Valley.

Maximum UV Index Levels in Spring Valley for September

The chart shows the monthly maximum UV Index (UVI) for Spring 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 Spring Valley typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110753
Data source: Spring 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 Spring Valley Compares to Other Months

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

This table compares monthly weather conditions in Spring Valley, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)19 mm (0.7 inches)76%moderate
February Weather9°C (49°F)22 mm (0.9 inches)80%high
March Weather13°C (56°F)19 mm (0.8 inches)69%very high
April Weather19°C (66°F)6 mm (0.2 inches)57%very high
May Weather23°C (73°F)8 mm (0.3 inches)45%extreme
June Weather30°C (86°F)1 mm (0.0 inches)34%extreme
July Weather32°C (91°F)17 mm (0.7 inches)29%extreme
August Weather32°C (90°F)11 mm (0.4 inches)28%extreme
September Weather27°C (81°F)5 mm (0.2 inches)41%very high
October Weather19°C (66°F)4 mm (0.2 inches)54%high
November Weather13°C (56°F)13 mm (0.5 inches)68%moderate
December Weather8°C (46°F)17 mm (0.7 inches)75%moderate

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