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September Weather in Hill City, United States

Last updated: June 24, 2025

In September, the average temperature in Hill City, United States hovers around 15°C (59°F), with a potential minimum drop to -1°C (31°F) and maximum highs reaching 30°C (87°F). This time of year brings about 106 mm (4.2 in) of precipitation over approximately 12 days, contributing to an average humidity level of 77%. Be prepared for a mix of weather as you explore this vibrant destination!

September Temperature in Hill City

In September in Hill City, the average temperature is 15°C (59°F). Maximums can reach 30°C (87°F) and minimums can be as low as -1°C (31°F). Be prepared for varying weather conditions and pack accordingly for a comfortable trip.

September Weather in Hill City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Hill City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hill City, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (87°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec111128395566706759442818
Data source: Temperature data for Hill City 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 Hill City

In Hill City in September, the precipitation amount is 106 mm (4.2 in), occurring over a span of 12 days.

September Precipitation Trends in Hill City

The chart displays monthly precipitation patterns in Hill City, 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 Hill City, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec212537676686109941061103253
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hill City

In Hill City in September, humidity is 77%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making it essential to stay hydrated and choose light, breathable clothing for comfortable travel.

September Average Humidity in Hill City

This chart illustrates the average monthly humidity levels in Hill City, 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 Hill City is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%93%88%83%76%76%76%77%77%82%88%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hill City

In Hill City in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Hill City.

Maximum UV Index Levels in Hill City for September

The chart shows the monthly maximum UV Index (UVI) for Hill City 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 Hill City typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789987532
Data source: Hill City 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 Hill City Compares to Other Months

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

This table compares monthly weather conditions in Hill City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-12°C (11°F)21 mm (0.8 inches)92%low
February Weather-12°C (11°F)25 mm (1.0 inches)93%moderate
March Weather-2°C (28°F)37 mm (1.4 inches)88%moderate
April Weather4°C (39°F)67 mm (2.6 inches)83%high
May Weather13°C (55°F)66 mm (2.6 inches)76%very high
June Weather19°C (66°F)86 mm (3.4 inches)76%very high
July Weather21°C (70°F)109 mm (4.3 inches)76%very high
August Weather19°C (67°F)94 mm (3.7 inches)77%very high
September Weather15°C (59°F)106 mm (4.2 inches)77%high
October Weather7°C (44°F)110 mm (4.3 inches)82%moderate
November Weather-2°C (28°F)32 mm (1.3 inches)87%moderate
December Weather-8°C (18°F)53 mm (2.1 inches)89%low

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