Saint Ignatius, MT Weather Forecast
Local 7-day forecast
Widespread Frost then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Ignatius, MT in one place.
Widespread frost before 10am. Mostly sunny, with a high near 65. South southeast wind around 5 mph.
Local Weather Overview
This forecast page for Saint Ignatius, MT is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 15, 2026 5:25 AM MDT.
The active forecast window currently covers Oct 16 to Oct 21, 2026 for Saint Ignatius, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 16 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 5:25 AM MDT
- Forecast office
- MSO
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Ignatius
Saturday looks like the warmest upcoming period in Saint Ignatius at 70 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 37 degrees F.
The strongest winds are forecast for Saturday at about 8 to 15 mph SSW.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Oct 15, 2026 5:25 AM MDT
- Coverage
- 6 days
- Time zone
- America/Denver
- Forecast office
- MSO
- Radar station
- KMSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 39. Southeast wind 3 to 9 mph.
Mostly sunny, with a high near 70.
Partly cloudy, with a low around 38.
Sunny, with a high near 59.
Partly cloudy, with a low around 38.
Mostly sunny, with a high near 62.
Mostly cloudy, with a low around 40.
Mostly sunny, with a high near 56.
A slight chance of rain before midnight. Partly cloudy, with a low around 37.
Sunny, with a high near 56.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Oct 16
|
Widespread Frost then Mostly Sunny
|
65°F |
5 mph
SSE
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
39°F |
3 to 9 mph
SE
|
|
Saturday
Oct 17
|
Mostly Sunny
|
70°F |
8 to 15 mph
SSW
|
|
Saturday Night
Oct 17
|
Partly Cloudy
|
38°F |
2 to 12 mph
SW
|
|
Sunday
Oct 18
|
Sunny
|
59°F |
3 mph
SW
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
38°F |
3 mph
E
|
|
Monday
Oct 19
|
Mostly Sunny
|
62°F |
3 mph
WNW
|
|
Monday Night
Oct 19
|
Mostly Cloudy
|
40°F |
2 mph
E
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
56°F |
2 mph
W
|
|
Tuesday Night
Oct 20
|
Slight Chance Light Rain then Partly Cloudy
|
37°F |
2 mph
SE
|
|
Wednesday
Oct 21
|
Sunny
|
56°F |
2 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Ignatius.