Weather forecast for 10 daysSaint Ignatius, MT
Weather forecast for the weekend
Sunday Oct 18, 2026
- 63°F
- 37°F
Partly Cloudy
- Precip. probability: 14%
- Precipitation: 0"
- Wind: 5mphNNE 16°
- Humidity: 65%
- UV index: 3
- Sunrise: 7:59 am MDT
- Sunset: 6:43 pm MDT
- details ▼
Tomorrow, in Saint Ignatius, high-altitude clouds may scatter across the sky, but the sun will still shine.
The forecasted temperature range extends from a high of an enjoyable 62.6°F to a low of a wintry 37.4°F.
A forecast high of 62.6°F brings conditions more familiar to September's average than October's.
Sunrise will be at 7:59 am and sunset at 6:43 pm; tomorrow's daylight will last for 10h and 44min.
The forecasted temperature range extends from a high of an enjoyable 62.6°F to a low of a wintry 37.4°F.
A forecast high of 62.6°F brings conditions more familiar to September's average than October's.
Sunrise will be at 7:59 am and sunset at 6:43 pm; tomorrow's daylight will last for 10h and 44min.
10-day overview
Daily temperatures
Warmest day: Wednesday 66°C.
Coldest day: Sunday 25.10. 46°C.
Coldest day: Sunday 25.10. 46°C.
Chance of precipitation
Highest chance: Friday 69%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- min.
- 37°F
Mostly Clear
- Precip. probability: 14%
- Precipitation: 0"
- Wind: 6mphE 93°
- Humidity: 72%
- UV index: 0
- Sunrise: 7:58 am MDT
- Sunset: 6:45 pm MDT
- details ▼
- Sunday
- Oct 18, 2026
- 63°F
- 37°F
Partly Cloudy
- Precip. probability: 14%
- Precipitation: 0"
- Wind: 5mphNNE 16°
- Humidity: 65%
- UV index: 3
- Sunrise: 7:59 am MDT
- Sunset: 6:43 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 64°F
- 37°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 4mphNNE 18°
- Humidity: 61%
- UV index: 3
- Sunrise: 8:01 am MDT
- Sunset: 6:41 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 64°F
- 39°F
Partly Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 4mphN 357°
- Humidity: 62%
- UV index: 2
- Sunrise: 8:02 am MDT
- Sunset: 6:39 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 66°F
- 41°F
Mostly Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 4mphW 275°
- Humidity: 59%
- UV index: 3
- Sunrise: 8:04 am MDT
- Sunset: 6:37 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 64°F
- 43°F
PM Showers
- Precip. probability: 56%
- Precipitation: 0.24"
- Wind: 4mphSW 222°
- Humidity: 67%
- UV index: 2
- Sunrise: 8:05 am MDT
- Sunset: 6:36 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 48°F
- 32°F
Showers
- Precip. probability: 69%
- Precipitation: 0.2"
- Wind: 7mphWNW 295°
- Humidity: 91%
- UV index: 2
- Sunrise: 8:06 am MDT
- Sunset: 6:34 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 48°F
- 30°F
Partly Cloudy
- Precip. probability: 11%
- Precipitation: 0.08"
- Wind: 5mphSSW 209°
- Humidity: 73%
- UV index: 2
- Sunrise: 8:08 am MDT
- Sunset: 6:32 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 46°F
- 30°F
AM Rain / Ice
- Precip. probability: 36%
- Precipitation: 0.04"
- Wind: 5mphNE 40°
- Humidity: 78%
- UV index: 2
- Sunrise: 8:09 am MDT
- Sunset: 6:30 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 48°F
- 30°F
Mostly Sunny
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 5mphNNW 344°
- Humidity: 75%
- UV index: 2
- Sunrise: 8:11 am MDT
- Sunset: 6:29 pm MDT
- details ▼
Weather fluctuations are likely over the next ten days, and a mix of dull, sunny, rain-filled and mixed-precipitation weather is anticipated.
Rainfall is expected on Thursday through next Sunday.
Temperature differences will be noticeable over the next several days. Forecast highs will fluctuate between 46.4°F and 66.2°F, while the lowest nightly temperature differences will be also quite pronounced, as the lowest temperatures will be recorded between 30.2°F and 42.8°F.
Expect the warmest day on Wednesday, with temperatures peaking at 66.2°F; the lowest daytime temperature of the period will be reached on next Sunday, peaking at 46.4°F.
Rainfall is expected on Thursday through next Sunday.
Temperature differences will be noticeable over the next several days. Forecast highs will fluctuate between 46.4°F and 66.2°F, while the lowest nightly temperature differences will be also quite pronounced, as the lowest temperatures will be recorded between 30.2°F and 42.8°F.
Expect the warmest day on Wednesday, with temperatures peaking at 66.2°F; the lowest daytime temperature of the period will be reached on next Sunday, peaking at 46.4°F.
Updated: Oct 18, 2026 @ 02:30:16 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, in Saint Ignatius, a partly cloudy outlook will keep the sky interesting throughout the day.
Tomorrow, the maximum temperature will be 62.6°F, while the minimum temperature will be 37.4°F.
The highest temperature tomorrow will be notably higher than the average maximum of 51.8°F in October. The lowest temperature will be a couple of degrees higher than the average low of 32.7°F.
The highest temperature tomorrow will be notably higher than the average maximum of 51.8°F in October. The lowest temperature will be a couple of degrees higher than the average low of 32.7°F.
On Sunday, in Saint Ignatius, sunrise will be at 7:59 am and sunset at 6:43 pm (MDT).
In Saint Ignatius, the length of the day tomorrow will be 10h and 44min.
