Summit forecast, next 72 hours
- New snow0 in
- Strongest gusts10 mphWednesday
- Coldest23°F
| Forecast | Snow | Gusts | Temp °F |
|---|---|---|---|
| Columbus DayMostly Cloudy | 0 in | 10 mph | High 37° |
| TonightMostly Cloudy | 0 in | 10 mph | Low 22° |
| TuesdayMostly Sunny | 0 in | 10 mph | High 42° |
| Tuesday NightMostly Clear | 0 in | 10 mph | Low 22° |
| WednesdaySunny | 0 in | 10 mph | High 47° |
| Wednesday NightMostly Clear | 0 in | 10 mph | Low 27° |
Snow is the forecast new accumulation at the summit grid point. Dots use Road Travel’s driving-risk scale.
Typical weather by month
Monthly normals from the long-term stations nearest the summit. None sits exactly on the pass, so each column says how far away and how high it is.
| Month | Moose Creek 6,200 ft · 2 mi south of the summit | Wisdom 6,060 ft · 25 mi east of the summit | Sula 5,155 ft · 18 mi northeast of the summit | |
|---|---|---|---|---|
| Precip (in) | High / low °F | High / low °F | Snow (in) | |
| Jan | 4.0 | 26° / 3° | 32° / 10° | 15.8 |
| Feb | 3.1 | 30° / 3° | 36° / 12° | 17.0 |
| Mar | 2.6 | 39° / 12° | 43° / 20° | 14.3 |
| Apr | 2.7 | 49° / 21° | 50° / 25° | 6.3 |
| May | 2.6 | 59° / 28° | 61° / 32° | 2.0 |
| Jun | 2.6 | 67° / 35° | 70° / 37° | 0.9 |
| Jul | 1.2 | 78° / 38° | 81° / 40° | 0 |
| Aug | 1.2 | 77° / 34° | 81° / 38° | 0 |
| Sep | 1.4 | 68° / 28° | 70° / 32° | 0.4 |
| Oct | 2.2 | 53° / 21° | 54° / 26° | 2.4 |
| Nov | 3.4 | 36° / 11° | 38° / 18° | 10.3 |
| Dec | 4.3 | 25° / 3° | 29° / 10° | 19.0 |
NOAA NCEI U.S. Climate Normals, 1991–2020: Moose Creek (USS0013D16S, 6,200 ft); WISDOM (USC00249067, 6,060 ft); SULA 14 NE (USC00247967, 5,155 ft). Snow days are days with at least 1 inch of new snow. “—” means the station does not publish that normal.
Cameras, road reports and winter rules
Conditions on the pass change by the hour, so these go straight to the official sources.
- Idaho · ITD511 Idaho road conditions
- Montana · MDT511MT road conditions
Check the official National Weather Service forecast for the summit and the road report before you leave.
Crossing Lost Trail Pass? See the summit at the hour you’ll be there
Road Travel times the forecast to your drive, so you see conditions at the summit when you will actually reach it, and get alerts about weather ahead on the way.
Questions about Lost Trail Pass
How high is Lost Trail Pass?
The summit is 7,014 ft above sea level, on US-93.
How far is Lost Trail Pass from Salmon and Darby?
By road, the summit is 46 miles from Salmon, ID and 31 miles from Darby, MT.
What is the wettest month at Lost Trail Pass?
December. The Moose Creek snow-monitoring site (6,200 ft, 2 mi south of the summit) averages 4.3 inches of precipitation that month, counting the water in melted snow (1991–2020 normals).