Weather forecast for 10 daysSweet Grass, MT
Weather forecast for the weekend
Sunday Oct 18, 2026
- 57°F
- 32°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 12mphSSE 150°
- Humidity: 44%
- UV index: 2
- Sunrise: 7:53 am MDT
- Sunset: 6:32 pm MDT
- details ▼
Today, sunny skies are in store, with excellent visibility.
Temperatures will oscillate between a mild 57.2°F at their highest and an icy 32°F at their lowest.
The forecasted temperature is slightly warmer than October's regular maximum of 51.4°F.
Sunrise will be at 7:53 am and sunset at 6:32 pm; the daylight will last for 10h and 39min.
Temperatures will oscillate between a mild 57.2°F at their highest and an icy 32°F at their lowest.
The forecasted temperature is slightly warmer than October's regular maximum of 51.4°F.
Sunrise will be at 7:53 am and sunset at 6:32 pm; the daylight will last for 10h and 39min.
10-day overview
Daily temperatures
Warmest day: Thursday 68°C.
Coldest day: Monday 26.10. 34°C.
Coldest day: Monday 26.10. 34°C.
Chance of precipitation
Highest chance: Friday 48%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 57°F
- 32°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 12mphSSE 150°
- Humidity: 44%
- UV index: 2
- Sunrise: 7:53 am MDT
- Sunset: 6:32 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 61°F
- 36°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 11mphS 188°
- Humidity: 59%
- UV index: 2
- Sunrise: 7:55 am MDT
- Sunset: 6:30 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 55°F
- 34°F
Partly Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 10mphN 352°
- Humidity: 55%
- UV index: 2
- Sunrise: 7:56 am MDT
- Sunset: 6:28 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 64°F
- 41°F
Mostly Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 17mphS 188°
- Humidity: 56%
- UV index: 2
- Sunrise: 7:58 am MDT
- Sunset: 6:26 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 68°F
- 41°F
Partly Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 11mphSW 214°
- Humidity: 49%
- UV index: 2
- Sunrise: 7:59 am MDT
- Sunset: 6:24 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 45°F
- 28°F
AM Showers
- Precip. probability: 48%
- Precipitation: 0.08"
- Wind: 19mphNW 319°
- Humidity: 78%
- UV index: 1
- Sunrise: 8:01 am MDT
- Sunset: 6:22 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 41°F
- 25°F
Partly Cloudy
- Precip. probability: 9%
- Precipitation: 0.16"
- Wind: 13mphWNW 291°
- Humidity: 68%
- UV index: 2
- Sunrise: 8:02 am MDT
- Sunset: 6:21 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 36°F
- 25°F
Mostly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 13mphN 0°
- Humidity: 81%
- UV index: 2
- Sunrise: 8:04 am MDT
- Sunset: 6:19 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 34°F
- 23°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 12mphNW 304°
- Humidity: 82%
- UV index: 2
- Sunrise: 8:06 am MDT
- Sunset: 6:17 pm MDT
- details ▼
- Tuesday
- Oct 27, 2026
- 36°F
- 25°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 12mphWNW 291°
- Humidity: 89%
- UV index: 2
- Sunrise: 8:07 am MDT
- Sunset: 6:15 pm MDT
- details ▼
During the ten-day period, primarily gloomy and occasionally mostly clear and damp weather is expected.
With a probability of 48%, rainfall is anticipated only on Friday. Forecasted precipitation will be light at 0.16".
The temperature will vary considerably in the next ten days. Highs will range from 33.8°F to 68°F, while the difference in minimum temperatures will be also substantial, as the overnight lows will vary from 23°F to 41°F.
The warmest day will be Thursday, with a maximum of 68°F; next Monday will be the coldest day, with the highest temperature of 33.8°F.
With a probability of 48%, rainfall is anticipated only on Friday. Forecasted precipitation will be light at 0.16".
The temperature will vary considerably in the next ten days. Highs will range from 33.8°F to 68°F, while the difference in minimum temperatures will be also substantial, as the overnight lows will vary from 23°F to 41°F.
The warmest day will be Thursday, with a maximum of 68°F; next Monday will be the coldest day, with the highest temperature of 33.8°F.
Updated: Oct 18, 2026 @ 08:48:07 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, sunshine and minimal clouds are in the outlook.
Today, the maximum temperature in Sweet Grass will be 57.2°F, while the minimum temperature will be 32°F.
Today, the maximum temperature will be a few degrees higher than the average highest temperature in October. The lowest temperature today will be also slightly cooler than the average low temperature.
Today, the maximum temperature will be a few degrees higher than the average highest temperature in October. The lowest temperature today will be also slightly cooler than the average low temperature.
On Sunday, in Sweet Grass, sunrise will be at 7:53 am and sunset at 6:32 pm (MDT).
In Sweet Grass, today, there will be 10h and 39min of daylight.
