Climate Overview
The climate in Hot Springs County-Thermopolis Municipal Airport is cool. The average annual temperature is 7°C and approximately 356mm of precipitation falls per year. May is the wettest month, receiving around 75mm of rainfall. Hot Springs County-Thermopolis Municipal Airport is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to -12°C. Snowfall occurs from January to December, with around 129cm accumulating over the season.
Temperature
Hot Springs County-Thermopolis Municipal Airport has a wide annual temperature range, spanning 43°C from the coldest to warmest months. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -12°C and the daily average is -8°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 9°C shift in average temperatures.
Precipitation
Hot Springs County-Thermopolis Municipal Airport is a quite dry location, receiving approximately 356mm of precipitation annually, which averages out to around 30mm per month. The wettest month is May, averaging 75mm of rainfall. April and September also tend to see above-average precipitation. The driest month is August, with just 11mm. That's 65mm less than May, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 129cm accumulating over the season. April typically sees the most snow at around 24cm.
Wind
Hot Springs County-Thermopolis Municipal Airport is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.
Seasons
2 days until Summer
It is currently spring in Hot Springs County-Thermopolis Municipal Airport, which began on March 20, 2026. Hot Springs County-Thermopolis Municipal Airport is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 31°C, while the coldest stretch bottoms out in January near -12°C. Summer is next, beginning on June 21, 2026 — 2 days from now.
Spring
Temperatures range from -3 to 18°C. Precipitation is moderate at around 163mm for the season, averaging 54mm per month. Winds are generally light, averaging 2km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 11 to 31°C. Rainfall is relatively light, with around 54mm over the season and a monthly average of 18mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from -5 to 24°C. Rainfall is relatively light, with around 88mm over the season and a monthly average of 29mm. Expect around 32cm of snow accumulation during this period. Winds are generally light, averaging 2km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from -12 to 1°C. Rainfall is relatively light, with around 50mm over the season and a monthly average of 17mm. Expect around 48cm of snow accumulation during this period. Winds are generally light, averaging 2km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.
Best Time to Visit
The best time to visit Hot Springs County-Thermopolis Municipal Airport is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 24mm per month. By contrast, January can be quite cold with temperatures dropping to -12°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
The table below shows monthly climate averages for Hot Springs County-Thermopolis Municipal Airport based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
