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September Weather in Nevada, United States

Last updated: June 24, 2025

In Nevada, United States, the average temperature in September hovers around 20°C (68°F), with a minimum dipping to 5°C (41°F) and a maximum soaring to 34°C (93°F). Expect about 76 mm (3.0 in) of precipitation over 8 days, contributing to an average humidity of 78%.

September Temperature in Nevada

In September in Nevada, the average temperature is 20°C (68°F). Maximums can reach 34°C (93°F) and minimums can be as low as 5°C (41°F). Travelers should be prepared for warm days and cool nights, making layering essentials for this time of year.

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 20°C (68°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec293241506371757268574135
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 76 mm (3.0 in) spread over a duration 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 76 mm (3.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec7395991131291311178576959076
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 78%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes exploring the sights a bit sticky, so travelers should stay hydrated and take frequent breaks in the shade.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
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 is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
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 Weather-1°C (30°F)72 mm (2.9 inches)88%moderate
February Weather0°C (32°F)95 mm (3.7 inches)87%moderate
March Weather5°C (41°F)99 mm (3.9 inches)87%high
April Weather10°C (51°F)113 mm (4.4 inches)87%very high
May Weather17°C (63°F)129 mm (5.1 inches)81%very high
June Weather22°C (71°F)131 mm (5.2 inches)82%very high
July Weather24°C (75°F)117 mm (4.6 inches)81%very high
August Weather22°C (73°F)85 mm (3.3 inches)78%very high
September Weather20°C (68°F)76 mm (3.0 inches)78%very high
October Weather14°C (57°F)95 mm (3.7 inches)82%high
November Weather5°C (42°F)90 mm (3.6 inches)89%moderate
December Weather2°C (35°F)76 mm (3.0 inches)86%low

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