Miles City, Montana Weather
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Climate of Miles City: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Miles City, with average daytime highs around 32°C. January is the coolest, when nights typically fall to about -9°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 42°C, so the seasons feel very different from each other.
The area receives about 380 mm of rain in a typical year. Rainfall is modest in every month; May is the wettest at about 84 mm. The driest stretch is November to March, with under 20 mm a month.
For outdoor plans and travel, May to June and August to September usually offer the most comfortable weather in Miles City, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 1° | -9° | 9 mm | 75% |
| Feb | 2° | -9° | 11 mm | 70% |
| Mar | 9° | -4° | 18 mm | 63% |
| Apr | 15° | 1° | 40 mm | 57% |
| May | 21° | 7° | 84 mm | 56% |
| Jun | 27° | 13° | 66 mm | 54% |
| Jul | 32° | 17° | 40 mm | 46% |
| Aug | 31° | 16° | 33 mm | 46% |
| Sep | 24° | 10° | 34 mm | 50% |
| Oct | 14° | 2° | 27 mm | 60% |
| Nov | 7° | -4° | 11 mm | 67% |
| Dec | 0° | -8° | 11 mm | 75% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Miles City. Values describe typical conditions, not a forecast.
About Miles City weather
Miles City is set in Montana's continental climate, ranging from northern plains to Rocky Mountain terrain, about 217 km east of Billings. Summers bring warm days and cool nights (June–August). The year winds down with long, cold winters with heavy mountain snowfall. This page shows live, auto-refreshing weather for Miles City: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Denver.
Frequently asked questions
Miles City is about 217 km east of Billings, in Montana.
Miles City sees long, cold winters with heavy mountain snowfall.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Miles City's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Miles City, with average daytime highs of about 32°C and nights around 17°C.
The coldest nights come in January, when the average low is about -9°C and daytime highs reach around 1°C. Frost is possible on clear, calm nights.
Miles City receives about 380 mm of rain in a typical year. May is the wettest month at roughly 84 mm; no month averages more than 100 mm.
May to June and August to September usually offer the most comfortable weather in Miles City, with mild daytime temperatures and little rain.
In November Miles City typically sees daytime highs near 7°C and lows near -4°C, with about 11 mm of rain over the month and average humidity around 67%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Miles City is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Miles City's day-to-day weather follows the broader pattern of Montana described above. See the hourly weather forecast or the air quality index for more detail.