Weather forecast for 10 daysGreat Falls, MT
Weather forecast for the weekend
Sunday Oct 18, 2026
- 63°F
- 37°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 11mphENE 67°
- Humidity: 48%
- UV index: 3
- Sunrise: 7:48 am MDT
- Sunset: 6:31 pm MDT
- details ▼
On Sunday, October 18, a partly cloudy sky is anticipated.
The temperature scale will run from a maximum of a breezy 62.6°F to a minimum of a cold 37.4°F.
The expected maximum temperature will be moderately higher than October's typical high of 54.5°F.
Sunrise will be at 7:48 am and sunset at 6:31 pm; the daylight will last for 10h and 43min.
The temperature scale will run from a maximum of a breezy 62.6°F to a minimum of a cold 37.4°F.
The expected maximum temperature will be moderately higher than October's typical high of 54.5°F.
Sunrise will be at 7:48 am and sunset at 6:31 pm; the daylight will last for 10h and 43min.
10-day overview
Daily temperatures
Maximum temperature: 70°C.
Coldest day: Sunday 25.10. 37°C.
Coldest day: Sunday 25.10. 37°C.
Chance of precipitation
Highest chance: Friday 68%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 63°F
- 37°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 11mphENE 67°
- Humidity: 48%
- UV index: 3
- Sunrise: 7:48 am MDT
- Sunset: 6:31 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 70°F
- 39°F
Mostly Sunny
- Precip. probability: 10%
- Precipitation: 0"
- Wind: 8mphSSW 196°
- Humidity: 52%
- UV index: 3
- Sunrise: 7:50 am MDT
- Sunset: 6:29 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 59°F
- 37°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 7mphWNW 298°
- Humidity: 60%
- UV index: 2
- Sunrise: 7:51 am MDT
- Sunset: 6:28 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 70°F
- 48°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 8mphSSW 212°
- Humidity: 55%
- UV index: 3
- Sunrise: 7:53 am MDT
- Sunset: 6:26 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 70°F
- 48°F
Partly Cloudy
- Precip. probability: 10%
- Precipitation: 0"
- Wind: 9mphSW 218°
- Humidity: 51%
- UV index: 2
- Sunrise: 7:54 am MDT
- Sunset: 6:24 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 50°F
- 36°F
Rain
- Precip. probability: 68%
- Precipitation: 0.08"
- Wind: 14mphW 272°
- Humidity: 78%
- UV index: 2
- Sunrise: 7:55 am MDT
- Sunset: 6:22 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 46°F
- 30°F
Partly Cloudy
- Precip. probability: 8%
- Precipitation: 0.2"
- Wind: 11mphSW 233°
- Humidity: 64%
- UV index: 2
- Sunrise: 7:57 am MDT
- Sunset: 6:21 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 37°F
- 32°F
Partly Cloudy
- Precip. probability: 20%
- Precipitation: 0"
- Wind: 11mphWNW 297°
- Humidity: 73%
- UV index: 2
- Sunrise: 7:58 am MDT
- Sunset: 6:19 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 39°F
- 28°F
Partly Cloudy
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 9mphW 264°
- Humidity: 69%
- UV index: 2
- Sunrise: 8:00 am MDT
- Sunset: 6:17 pm MDT
- details ▼
- Tuesday
- Oct 27, 2026
- 41°F
- 30°F
Partly Cloudy
- Precip. probability: 23%
- Precipitation: 0"
- Wind: 10mphWSW 244°
- Humidity: 79%
- UV index: 2
- Sunrise: 8:01 am MDT
- Sunset: 6:16 pm MDT
- details ▼
Over the next ten days, a mix of primarily overcast and occasionally clear and rain-soaked weather is predicted.
With a probability of 68%, rainfall is expected only on Friday. The precipitation will be light at 0.2".
Temperature fluctuation will be noticeable throughout the forecast window. Maximum temperatures are forecasted between 37.4°F and 69.8°F, while the fluctuation in night temperatures will be also significant, as nighttime lows are forecast to fall between 28.4°F and 48.2°F.
The warmest days in Great Falls will be Monday, Wednesday and Thursday, with a maximum of 69.8°F; next Sunday will be the coldest day, with the highest temperature of 37.4°F.
With a probability of 68%, rainfall is expected only on Friday. The precipitation will be light at 0.2".
Temperature fluctuation will be noticeable throughout the forecast window. Maximum temperatures are forecasted between 37.4°F and 69.8°F, while the fluctuation in night temperatures will be also significant, as nighttime lows are forecast to fall between 28.4°F and 48.2°F.
The warmest days in Great Falls will be Monday, Wednesday and Thursday, with a maximum of 69.8°F; next Sunday will be the coldest day, with the highest temperature of 37.4°F.
Updated: Oct 18, 2026 @ 07:04:47 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, expect a mix of sun and clouds throughout the day.
Today, the maximum temperature will be 62.6°F, while the minimum temperature will be 37.4°F.
The maximum temperature today will be slightly warmer than the average highest temperature in October. The lowest temperature will be in line with the average low of 37.8°F.
The maximum temperature today will be slightly warmer than the average highest temperature in October. The lowest temperature will be in line with the average low of 37.8°F.
On Sunday, in Great Falls, sunrise will be at 7:48 am and sunset at 6:31 pm (MDT).
In Great Falls, the length of the day today will be 10h and 43min.
