Weather forecast for 10 daysSun River, MT
Weather forecast for the weekend
Saturday Oct 17, 2026
- min.
- 39°F
Partly Cloudy / Wind
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 25mphWSW 248°
- Humidity: 42%
- UV index: 0
- Sunrise: 7:48 am MDT
- Sunset: 6:35 pm MDT
- details ▼
For the remainder of Saturday, expect blustery conditions under a sky filled with passing clouds.
The lowest forecasted temperature is a wintry 39.2°F.
Sunrise was at 7:48 am and sunset will be at 6:35 pm; the daylight will last for 10h and 46min.
The lowest forecasted temperature is a wintry 39.2°F.
Sunrise was at 7:48 am and sunset will be at 6:35 pm; the daylight will last for 10h and 46min.
Sunday Oct 18, 2026
- 61°F
- 36°F
Partly Cloudy
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 9mphE 89°
- Humidity: 52%
- UV index: 3
- Sunrise: 7:50 am MDT
- Sunset: 6:33 pm MDT
- details ▼
Tomorrow, on Sunday, sunny moments will alternate with patchy cloud cover.
Expected temperature values will span from a comfortable 60.8°F down to a wintry 35.6°F.
Tomorrow, the maximum temperature is expected to be a couple of degrees higher than the common October peak of 54.5°F.
Sunrise will be at 7:50 am and sunset at 6:33 pm; tomorrow's daylight will last for 10h and 43min.
Expected temperature values will span from a comfortable 60.8°F down to a wintry 35.6°F.
Tomorrow, the maximum temperature is expected to be a couple of degrees higher than the common October peak of 54.5°F.
Sunrise will be at 7:50 am and sunset at 6:33 pm; tomorrow's daylight will last for 10h and 43min.
10-day overview
Daily temperatures
Warmest day: today 73°C.
Coldest period: Sunday - Monday 41°C.
Coldest period: Sunday - Monday 41°C.
Chance of precipitation
Highest chance: Friday 42%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- min.
- 39°F
Partly Cloudy / Wind
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 25mphWSW 248°
- Humidity: 42%
- UV index: 0
- Sunrise: 7:48 am MDT
- Sunset: 6:35 pm MDT
- details ▼
- Sunday
- Oct 18, 2026
- 61°F
- 36°F
Partly Cloudy
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 9mphE 89°
- Humidity: 52%
- UV index: 3
- Sunrise: 7:50 am MDT
- Sunset: 6:33 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 68°F
- 39°F
Partly Cloudy
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 7mphSSW 195°
- Humidity: 52%
- UV index: 3
- Sunrise: 7:51 am MDT
- Sunset: 6:31 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 59°F
- 37°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 7mphNW 325°
- Humidity: 58%
- UV index: 2
- Sunrise: 7:53 am MDT
- Sunset: 6:29 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 70°F
- 46°F
Sunny
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 11mphSSW 206°
- Humidity: 53%
- UV index: 3
- Sunrise: 7:54 am MDT
- Sunset: 6:28 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 68°F
- 46°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0.08"
- Wind: 11mphSW 215°
- Humidity: 52%
- UV index: 2
- Sunrise: 7:56 am MDT
- Sunset: 6:26 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 50°F
- 36°F
Showers
- Precip. probability: 42%
- Precipitation: 0.12"
- Wind: 13mphW 280°
- Humidity: 74%
- UV index: 2
- Sunrise: 7:57 am MDT
- Sunset: 6:24 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 46°F
- 30°F
Partly Cloudy
- Precip. probability: 10%
- Precipitation: 0"
- Wind: 10mphSW 231°
- Humidity: 59%
- UV index: 2
- Sunrise: 7:59 am MDT
- Sunset: 6:22 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 41°F
- 30°F
AM Snow Showers
- Precip. probability: 32%
- Precipitation: 0.08"
- Wind: 11mphNNW 336°
- Humidity: 68%
- UV index: 2
- Sunrise: 8:00 am MDT
- Sunset: 6:21 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 41°F
- 32°F
Mostly Sunny
- Precip. probability: 13%
- Precipitation: 0"
- Wind: 10mphSW 233°
- Humidity: 68%
- UV index: 2
- Sunrise: 8:02 am MDT
- Sunset: 6:19 pm MDT
- details ▼
The weather will be unstable for the next ten days, and a mix of dull, sun-filled, rainy and snowy and cold weather is expected.
With a 42% probability, rainfall is forecasted only for Friday. Anticipated precipitation will be minimal at 0.12".
With a 32% probability, snowfall is forecasted only for next Sunday. Anticipated precipitation will be light at 0.12".
Expect a substantial fluctuation in daytime highs throughout the forecast window. Highs will range from 41°F to 69.8°F, while the difference in minimum temperatures will be also substantial, as nighttime lows are forecast to fall between 30.2°F and 46.4°F.
Wednesday is expected to be the warmest, reaching up to 69.8°F; the coldest days will be next Sunday and Monday, with a maximum of 41°F.
With a 42% probability, rainfall is forecasted only for Friday. Anticipated precipitation will be minimal at 0.12".
With a 32% probability, snowfall is forecasted only for next Sunday. Anticipated precipitation will be light at 0.12".
Expect a substantial fluctuation in daytime highs throughout the forecast window. Highs will range from 41°F to 69.8°F, while the difference in minimum temperatures will be also substantial, as nighttime lows are forecast to fall between 30.2°F and 46.4°F.
Wednesday is expected to be the warmest, reaching up to 69.8°F; the coldest days will be next Sunday and Monday, with a maximum of 41°F.
Updated: Oct 17, 2026 @ 21:01:06 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
On Sunday, the sky will feature a blend of clouds and sunshine.
Tomorrow, the maximum temperature will be 60.8°F, while the minimum temperature will be 35.6°F.
The highest temperature will be a few degrees higher than the average maximum of 54.5°F in October. The lowest temperature will be in line with the average low of 36.7°F.
The highest temperature will be a few degrees higher than the average maximum of 54.5°F in October. The lowest temperature will be in line with the average low of 36.7°F.
On Sunday, in Sun River, sunrise will be at 7:50 am and sunset at 6:33 pm (MDT).
In Sun River, tomorrow, there will be 10h and 43min of daylight.





