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September Weather in Nevada, United States

Last updated: June 24, 2025

In Nevada, United States during September, the average temperature hovers around a warm 26°C (79°F). Expect variations with a minimum of 10°C (51°F) and a maximum soaring to 37°C (100°F). Be prepared for some wet days, as the area receives an average precipitation of 83 mm (3.2 in) over approximately 8 days. With an average humidity of 65%, it's advisable to stay hydrated as you enjoy the warmth!

September Temperature in Nevada

In September in Nevada, the average temperature is 26°C (79°F). Maximum temperatures can reach as high as 37°C (100°F), while the minimum can drop to a chilly 10°C (51°F). Overall, travelers should be prepared for a warm climate with potential fluctuations, making it ideal for various outdoor activities as long as they dress accordingly.

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

The chart illustrates September temperature patterns in Nevada, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nevada, September typically has an average temperature of 26°C (79°F), with highs reaching up to 37°C (100°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec464960647381848479675651
Data source: Temperature data for Nevada 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 Nevada

In Nevada in September, the precipitation amount is 83 mm (3.2 in) over a span of 8 days.

September Precipitation Trends in Nevada

The chart displays monthly precipitation patterns in Nevada, 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 Nevada, September typically receives around 83 mm (3.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec71120119156173975588831475779
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Nevada

In Nevada in September, humidity is 65%. With an average temperature of 26°C (79°F), this humidity feels like a warm, enveloping blanket, making travel quite sticky and uncomfortable.

September Average Humidity in Nevada

This chart illustrates the average monthly humidity levels in Nevada, 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 Nevada is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Nevada

In Nevada 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 Nevada.

Maximum UV Index Levels in Nevada for September

The chart shows the monthly maximum UV Index (UVI) for Nevada 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 Nevada typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
Data source: Nevada 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 Nevada Compares to Other Months

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

This table compares monthly weather conditions in Nevada, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)71 mm (2.8 inches)80%moderate
February Weather9°C (49°F)120 mm (4.7 inches)79%high
March Weather15°C (60°F)119 mm (4.7 inches)78%very high
April Weather18°C (65°F)156 mm (6.1 inches)78%very high
May Weather23°C (74°F)173 mm (6.8 inches)81%extreme
June Weather27°C (81°F)96 mm (3.8 inches)78%extreme
July Weather29°C (84°F)55 mm (2.2 inches)73%extreme
August Weather29°C (84°F)88 mm (3.5 inches)66%extreme
September Weather26°C (79°F)83 mm (3.2 inches)65%very high
October Weather20°C (67°F)147 mm (5.8 inches)72%very high
November Weather13°C (56°F)57 mm (2.3 inches)82%high
December Weather11°C (51°F)79 mm (3.1 inches)87%moderate

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