Weather forecast for 10 daysChinook, MT
Weather forecast for the weekend
Sunday Oct 18, 2026
- 63°F
- 37°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 11mphESE 108°
- Humidity: 43%
- UV index: 3
- Sunrise: 7:42 am MDT
- Sunset: 6:21 pm MDT
- details ▼
Today, on Sunday, October 18, high-altitude clouds may scatter across the sky, but the sun will still shine.
The temperature will vary between a maximum of an enjoyable 62.6°F and a minimum of a cold 37.4°F.
Today, the maximum temperature is predicted to be in line with the typical October high of 59.2°F.
Sunrise will be at 7:42 am and sunset at 6:21 pm; the daylight will last for 10h and 40min.
The temperature will vary between a maximum of an enjoyable 62.6°F and a minimum of a cold 37.4°F.
Today, the maximum temperature is predicted to be in line with the typical October high of 59.2°F.
Sunrise will be at 7:42 am and sunset at 6:21 pm; the daylight will last for 10h and 40min.
10-day overview
Daily temperatures
Warmest day: Thursday 70°C.
Coldest day: Monday 26.10. 41°C.
Coldest day: Monday 26.10. 41°C.
Chance of precipitation
Highest chance: Friday 54%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 63°F
- 37°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 11mphESE 108°
- Humidity: 43%
- UV index: 3
- Sunrise: 7:42 am MDT
- Sunset: 6:21 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 66°F
- 34°F
Mostly Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 11mphESE 105°
- Humidity: 51%
- UV index: 2
- Sunrise: 7:43 am MDT
- Sunset: 6:20 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 63°F
- 34°F
Partly Cloudy
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 8mphNW 315°
- Humidity: 59%
- UV index: 2
- Sunrise: 7:45 am MDT
- Sunset: 6:18 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 68°F
- 39°F
Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 12mphESE 122°
- Humidity: 57%
- UV index: 2
- Sunrise: 7:46 am MDT
- Sunset: 6:16 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 70°F
- 45°F
Mostly Sunny
- Precip. probability: 18%
- Precipitation: 0"
- Wind: 6mphE 93°
- Humidity: 58%
- UV index: 2
- Sunrise: 7:48 am MDT
- Sunset: 6:14 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 54°F
- 34°F
Showers
- Precip. probability: 54%
- Precipitation: 0"
- Wind: 19mphWNW 291°
- Humidity: 72%
- UV index: 1
- Sunrise: 7:49 am MDT
- Sunset: 6:12 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 46°F
- 27°F
Partly Cloudy
- Precip. probability: 11%
- Precipitation: 0.16"
- Wind: 16mphW 278°
- Humidity: 64%
- UV index: 2
- Sunrise: 7:51 am MDT
- Sunset: 6:10 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 45°F
- 28°F
Mostly Cloudy
- Precip. probability: 9%
- Precipitation: 0"
- Wind: 14mphE 101°
- Humidity: 73%
- UV index: 2
- Sunrise: 7:52 am MDT
- Sunset: 6:09 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 41°F
- 27°F
Partly Cloudy
- Precip. probability: 18%
- Precipitation: 0"
- Wind: 11mphE 96°
- Humidity: 79%
- UV index: 2
- Sunrise: 7:54 am MDT
- Sunset: 6:07 pm MDT
- details ▼
- Tuesday
- Oct 27, 2026
- 43°F
- 28°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 12mphW 276°
- Humidity: 86%
- UV index: 2
- Sunrise: 7:55 am MDT
- Sunset: 6:05 pm MDT
- details ▼
During the ten-day period, cloudy, dry and sunny and rain-filled weather is predicted.
With a 11% probability, rainfall is predicted only for Saturday. The precipitation will be light at 0.16".
Significant changes in temperature are expected across the forecast period. The temperature is expected to swing from 41°F up to 69.8°F, while there will be also a marked difference in overnight low temperatures, as the lowest temperatures will be recorded between 26.6°F and 44.6°F.
Expect the warmest day on Thursday, with temperatures peaking at 69.8°F; the lowest daytime temperature of the period will be reached on next Monday, peaking at 41°F.
With a 11% probability, rainfall is predicted only for Saturday. The precipitation will be light at 0.16".
Significant changes in temperature are expected across the forecast period. The temperature is expected to swing from 41°F up to 69.8°F, while there will be also a marked difference in overnight low temperatures, as the lowest temperatures will be recorded between 26.6°F and 44.6°F.
Expect the warmest day on Thursday, with temperatures peaking at 69.8°F; the lowest daytime temperature of the period will be reached on next Monday, peaking at 41°F.
Updated: Oct 18, 2026 @ 08:37:23 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, a mix of clouds and blue sky is expected.
Today, the highest temperature in Chinook will be 62.6°F, while the lowest temperature will be 37.4°F.
Today, the highest temperature will be in line with the average maximum temperature in October. The lowest temperature will be significantly higher than the average low of 27.1°F.
Today, the highest temperature will be in line with the average maximum temperature in October. The lowest temperature will be significantly higher than the average low of 27.1°F.
On Sunday, in Chinook, sunrise will be at 7:42 am and sunset at 6:21 pm (MDT).
In Chinook, Montana, the length of the day today will be 10h and 40min.
