Climate Insights for Miles City

The climate in Miles City is cool. The average annual temperature is 8°C and approximately 413mm of precipitation falls per year. September is the wettest month, receiving around 63mm of rainfall. Miles City 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 February, January, December, when temperatures can drop to -11°C. Snowfall occurs from January to December, with around 95cm accumulating over the season.

Miles City has a wide annual temperature range, spanning 43°C from the coldest to warmest months. The warmest month is July, when average highs reach 32°C and the mean temperature sits around 24°C. The coldest month is February, when overnight lows fall to -11°C and the daily average is -6°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 9°C shift in average temperatures.

Miles City is a relatively dry area, receiving approximately 413mm of precipitation annually, which averages out to around 34mm per month. The wettest month is September, averaging 63mm of rainfall. May and April also tend to see above-average precipitation. The driest month is January, with just 17mm. That's 46mm less than September, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 95cm accumulating over the season. February typically sees the most snow at around 23cm.

Miles City is relatively calm, with an average annual wind speed of 4km/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 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 4km/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.

It is currently summer in Miles City, which began on June 21, 2026. Miles City 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 32°C, while the coldest stretch bottoms out in February near -11°C. Autumn is next, beginning on September 23, 2026 — 81 days from now.

The best time to visit Miles City is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 42mm per month. By contrast, February can be quite cold with temperatures dropping to -11°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Miles City 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.