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September Weather in Sundance, United States

Last updated: June 24, 2025

In September, the average temperature in Sundance, United States hovers around 15°C (60°F), making it a comfortable time to visit. However, be prepared for variations, as temperatures can dip to a chilly -2°C (29°F) or soar to a sweltering 37°C (99°F). Expect 49 mm (1.9 in) of precipitation spread over 7 days, contributing to an average humidity of 77%. Dress accordingly to fully enjoy your experience!

September Temperature in Sundance

In September in Sundance, the average temperature is 15°C (60°F). The maximum can reach 37°C (99°F), while the minimum can drop as low as -2°C (29°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack accordingly for both warm days and chilly nights.

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

The chart illustrates September temperature patterns in Sundance, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sundance, September typically has an average temperature of 15°C (60°F), with highs reaching up to 37°C (99°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec252035405165716860423528
Data source: Temperature data for Sundance 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 Sundance

In Sundance in September, the precipitation amount is 49 mm (1.9 in) over the course of 7 days.

September Precipitation Trends in Sundance

The chart displays monthly precipitation patterns in Sundance, 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 Sundance, September typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec213136697952795049542129
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sundance

In Sundance in September, humidity is 77%. With an average temperature of 15°C (60°F), this humidity feels like you're wading through a warm, heavy blanket, making travel feel more exhausting and sticky than usual.

September Average Humidity in Sundance

This chart illustrates the average monthly humidity levels in Sundance, 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 Sundance is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%70%70%76%84%85%85%77%73%74%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sundance

In Sundance 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 Sundance.

Maximum UV Index Levels in Sundance for September

The chart shows the monthly maximum UV Index (UVI) for Sundance 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 Sundance typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356991111108532
Data source: Sundance 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 Sundance Compares to Other Months

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

This table compares monthly weather conditions in Sundance, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)21 mm (0.8 inches)77%moderate
February Weather-6°C (21°F)31 mm (1.2 inches)80%moderate
March Weather2°C (35°F)36 mm (1.4 inches)70%high
April Weather4°C (40°F)69 mm (2.7 inches)70%very high
May Weather11°C (51°F)79 mm (3.1 inches)76%very high
June Weather18°C (65°F)52 mm (2.1 inches)84%extreme
July Weather22°C (72°F)79 mm (3.1 inches)85%extreme
August Weather20°C (68°F)50 mm (2.0 inches)84%very high
September Weather15°C (60°F)49 mm (1.9 inches)77%very high
October Weather6°C (42°F)54 mm (2.1 inches)73%moderate
November Weather2°C (35°F)21 mm (0.8 inches)74%moderate
December Weather-2°C (28°F)29 mm (1.1 inches)79%low

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