September Weather in Thermopolis

Last updated: March 2, 2024

The weather in Thermopolis, United States, during September is characterized by an average temperature of 17°C (62°F). Highs can soar to 35°C (95°F), while lows may dip to 0°C (33°F). Typically, the humidity level in Thermopolis throughout September hovers around 59%.

0°C (33°F)

Minimum temperature

17°C (62°F)

Average temperature

35°C (95°F)

Maximum temperature

59%

Humidity

Precipitation and Sunshine hours

In September, Thermopolis averages 27 mm (1.0 inches) of rainfall, typically over the course of 3 rainy days. The month enjoys an average of 12 hours 26 minutes of daylight, with the sun shining for approximately 10 hours 2 minutes each day. Additionally, there is a 74% probability of sunny days during this period.

27 mm (1.0 inches)

Precipitation

3 rainy days

Rainy days

10 hours 2 minutes

Sunshine hours

74%

Chance of sun

UV Index

In September, the UV Index in Thermopolis reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 1 2 4 6 8 9 8 7 5 3 1 1
Exposure Low Moderate High VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 25 min 30 min 45 min

Compare Thermopolis's Climate with Cities Worldwide