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September Weather in Hysham, United States

Last updated: June 24, 2025

In Hysham, United States, the average temperature in September hovers around 17°C (63°F). Expect a range from a chilly 2°C (35°F) to a sweltering 38°C (101°F). Rainfall is moderate, with an average precipitation of 43 mm (1.7 in) spread over about 5 days. Additionally, you'll experience an average humidity level of 67%, making for a comfortable atmosphere.

September Temperature in Hysham

In September in Hysham, the average temperature is 17°C (63°F). Maximum temperatures can reach 38°C (101°F), while minimums can drop as low as 2°C (35°F). Be prepared for a wide range of temperatures during your travels!

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

The chart illustrates September temperature patterns in Hysham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hysham, September typically has an average temperature of 17°C (63°F), with highs reaching up to 38°C (101°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec241934445668777463463628
Data source: Temperature data for Hysham 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 Hysham

In Hysham in September, the precipitation amount is 43 mm (1.7 in) over the course of 5 days.

September Precipitation Trends in Hysham

The chart displays monthly precipitation patterns in Hysham, 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 Hysham, September typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec173430545158262143342324
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hysham

In Hysham in September, humidity is 67%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket wrapping around you, making travel refreshing yet slightly muggy, as you navigate the sights with a pleasant, if slightly sticky, embrace.

September Average Humidity in Hysham

This chart illustrates the average monthly humidity levels in Hysham, 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 Hysham is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%76%70%76%78%78%73%67%68%77%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hysham

In Hysham 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 Hysham.

Maximum UV Index Levels in Hysham for September

The chart shows the monthly maximum UV Index (UVI) for Hysham 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 Hysham typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24599101098532
Data source: Hysham 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 Hysham Compares to Other Months

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

This table compares monthly weather conditions in Hysham, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)17 mm (0.7 inches)80%low
February Weather-7°C (19°F)33 mm (1.3 inches)83%moderate
March Weather1°C (35°F)30 mm (1.2 inches)75%moderate
April Weather7°C (44°F)54 mm (2.1 inches)70%very high
May Weather13°C (57°F)51 mm (2.0 inches)76%very high
June Weather20°C (69°F)58 mm (2.3 inches)78%very high
July Weather25°C (77°F)26 mm (1.0 inches)78%very high
August Weather23°C (74°F)21 mm (0.8 inches)73%very high
September Weather17°C (63°F)43 mm (1.7 inches)67%very high
October Weather8°C (46°F)34 mm (1.3 inches)68%moderate
November Weather2°C (37°F)23 mm (0.9 inches)77%moderate
December Weather-2°C (29°F)24 mm (1.0 inches)84%low

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