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September Weather in Spring Valley, United States

Last updated: June 24, 2025

In September, the average temperature in Spring Valley, United States reaches a pleasant 24°C (75°F). However, be prepared for temperature fluctuations, as it can drop as low as 8°C (46°F) and soar up to 39°C (102°F). Expect moderate rain with an average precipitation of 38 mm (1.5 in) spread over 5 days, while the average humidity lingers around 59%.

September Temperature in Spring Valley

In September, in Spring Valley, the average temperature is 24°C (75°F). Maximums can reach 39°C (102°F) and minimums can be as low as 8°C (46°F). This makes it a great time to enjoy various outdoor activities while being prepared for both warm and cooler evenings.

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 24°C (75°F), with highs reaching up to 39°C (102°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec454652616879818075635546
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 total precipitation amount is 38 mm (1.5 in) spread over a duration of 5 days.

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 38 mm (1.5 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec47555681261186238333336
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 59%. With an average temperature of 24°C (75°F), this humidity feels like a warm embrace, making outdoor activities refreshing yet slightly sticky, perfect for leisurely strolls but reminding travelers to stay hydrated.

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 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%72%63%46%35%33%41%59%70%79%82%
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.
JanFebMarAprMayJunJulAugSepOctNovDec479111212121110864
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 Weather7°C (45°F)47 mm (1.8 inches)80%moderate
February Weather8°C (46°F)55 mm (2.2 inches)83%high
March Weather11°C (52°F)56 mm (2.2 inches)72%very high
April Weather16°C (61°F)8 mm (0.3 inches)63%extreme
May Weather20°C (68°F)12 mm (0.5 inches)46%extreme
June Weather26°C (79°F)5 mm (0.2 inches)35%extreme
July Weather27°C (81°F)118 mm (4.6 inches)33%extreme
August Weather26°C (80°F)62 mm (2.4 inches)41%extreme
September Weather24°C (75°F)38 mm (1.5 inches)59%very high
October Weather17°C (63°F)33 mm (1.3 inches)70%very high
November Weather13°C (55°F)33 mm (1.3 inches)79%high
December Weather8°C (46°F)36 mm (1.4 inches)82%moderate

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