Weather forecast for 10 daysHarrison, MT
Weather forecast for the weekend
Sunday Oct 18, 2026
- 61°F
- 32°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 4mphNNE 13°
- Humidity: 53%
- UV index: 3
- Sunrise: 7:48 am MDT
- Sunset: 6:36 pm MDT
- details ▼
Tomorrow, on Sunday, changing cloud patterns will allow for periods of sunshine.
Temperatures are set to span a considerable range, with a high of an enjoyable 60.8°F and a low of an icy 32°F.
The expected top temperature is expected to be a few degrees higher than the usual October maximum of 53.8°F.
Sunrise will be at 7:48 am and sunset at 6:36 pm; tomorrow's daylight will last for 10h and 48min.
Temperatures are set to span a considerable range, with a high of an enjoyable 60.8°F and a low of an icy 32°F.
The expected top temperature is expected to be a few degrees higher than the usual October maximum of 53.8°F.
Sunrise will be at 7:48 am and sunset at 6:36 pm; tomorrow's daylight will last for 10h and 48min.
10-day overview
Daily temperatures
Warmest day: today 70°C.
Coldest day: Monday 26.10. 43°C.
Coldest day: Monday 26.10. 43°C.
Chance of precipitation
Highest chance: Friday 63%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- min.
- 36°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 14mphSW 217°
- Humidity: 47%
- UV index: 0
- Sunrise: 7:46 am MDT
- Sunset: 6:38 pm MDT
- details ▼
- Sunday
- Oct 18, 2026
- 61°F
- 32°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 4mphNNE 13°
- Humidity: 53%
- UV index: 3
- Sunrise: 7:48 am MDT
- Sunset: 6:36 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 66°F
- 36°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 4mphNW 307°
- Humidity: 49%
- UV index: 3
- Sunrise: 7:49 am MDT
- Sunset: 6:34 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 63°F
- 37°F
Partly Cloudy
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 4mphNNW 333°
- Humidity: 50%
- UV index: 2
- Sunrise: 7:50 am MDT
- Sunset: 6:32 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 64°F
- 39°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 5mphWSW 256°
- Humidity: 59%
- UV index: 3
- Sunrise: 7:52 am MDT
- Sunset: 6:31 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 63°F
- 41°F
Partly Cloudy
- Precip. probability: 10%
- Precipitation: 0.08"
- Wind: 6mphSW 219°
- Humidity: 61%
- UV index: 3
- Sunrise: 7:53 am MDT
- Sunset: 6:29 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 48°F
- 28°F
Rain
- Precip. probability: 63%
- Precipitation: 0.31"
- Wind: 7mphWNW 285°
- Humidity: 80%
- UV index: 1
- Sunrise: 7:54 am MDT
- Sunset: 6:27 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 46°F
- 28°F
Partly Cloudy
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 6mphWSW 245°
- Humidity: 64%
- UV index: 3
- Sunrise: 7:56 am MDT
- Sunset: 6:26 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 46°F
- 27°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 6mphNW 309°
- Humidity: 68%
- UV index: 2
- Sunrise: 7:57 am MDT
- Sunset: 6:24 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 43°F
- 28°F
Partly Cloudy
- Precip. probability: 21%
- Precipitation: 0"
- Wind: 6mphWNW 289°
- Humidity: 70%
- UV index: 3
- Sunrise: 7:59 am MDT
- Sunset: 6:23 pm MDT
- details ▼
Looking ahead, conditions suggest a period of primarily overcast and occasionally clear and rainy weather is anticipated.
With a probability of 63%, rainfall is anticipated only on Friday. The precipitation will be light at 0.31".
Temperature fluctuation will be noticeable in the upcoming days. The temperature is expected to swing from 42.8°F up to 66.2°F, while the variation in nighttime lows will be also notably wide, as the minimum temperature is expected to range between 26.6°F and 41°F.
Monday will be the warmest day, with a maximum temperature of 66.2°F; the lowest daytime temperature of the period will be reached on next Monday, peaking at 42.8°F.
With a probability of 63%, rainfall is anticipated only on Friday. The precipitation will be light at 0.31".
Temperature fluctuation will be noticeable in the upcoming days. The temperature is expected to swing from 42.8°F up to 66.2°F, while the variation in nighttime lows will be also notably wide, as the minimum temperature is expected to range between 26.6°F and 41°F.
Monday will be the warmest day, with a maximum temperature of 66.2°F; the lowest daytime temperature of the period will be reached on next Monday, peaking at 42.8°F.
Updated: Oct 17, 2026 @ 22:47:37 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
Tomorrow, in Harrison, 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 32°F.
Tomorrow, the maximum temperature will be relatively higher than the average highest temperature in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
Tomorrow, the maximum temperature will be relatively higher than the average highest temperature in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
On Sunday, in Harrison, sunrise will be at 7:48 am and sunset at 6:36 pm (MDT).
In Harrison, the length of the day tomorrow will be 10h and 48min.
