Summit forecast, next 72 hours
- New snow0 in
- Strongest gusts20 mphColumbus Day
- Coldest22°F
| Forecast | Snow | Gusts | Temp °F |
|---|---|---|---|
| Columbus DaySnow Showers Likely | 0 in | 20 mph | High 41° |
| TonightSnow Showers Likely | 0 in | 10 mph | Low 28° |
| TuesdayChance Snow Showers | 0 in | 15 mph | High 42° |
| Tuesday NightSlight Chance Snow Showers then Mostly Cloudy | 0 in | 15 mph | Low 21° |
| WednesdayMostly Sunny | 0 in | 15 mph | High 47° |
| Wednesday NightMostly Clear | 0 in | 15 mph | Low 21° |
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 | Sylvan Lake 8,420 ft · 2 mi northwest of the summit | Lake Yellowstone 7,892 ft · 15 mi northwest of the summit | Yellowstone Lake 7,835 ft · 16 mi west of the summit | |
|---|---|---|---|---|
| Precip (in) | High / low °F | Snow (in) | High / low °F | |
| Jan | 4.0 | 23° / 3° | 35.8 | 23° / 1° |
| Feb | 3.3 | 27° / 4° | 30.9 | 26° / 1° |
| Mar | 3.7 | 35° / 11° | 25.1 | 35° / 8° |
| Apr | 4.2 | 42° / 19° | 22.9 | 41° / 17° |
| May | 3.9 | 50° / 29° | 6.9 | 51° / 26° |
| Jun | 3.5 | 61° / 36° | 1.0 | 61° / 33° |
| Jul | 1.5 | 71° / 43° | 0 | 72° / 39° |
| Aug | 1.4 | 71° / 42° | 0 | 71° / 37° |
| Sep | 2.5 | 61° / 34° | 1.4 | 61° / 30° |
| Oct | 3.5 | 46° / 25° | 10.2 | 46° / 22° |
| Nov | 4.2 | 33° / 15° | 29.8 | 32° / 11° |
| Dec | 4.3 | 24° / 7° | 35.4 | 23° / 3° |
NOAA NCEI U.S. Climate Normals, 1991–2020: Sylvan Lake (USS0010E06S, 8,420 ft); LAKE YELLOWSTONE (USC00485345, 7,892 ft); YELLOWSTONE LAKE (USW00094173, 7,835 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.
Closes for the winter. The National Park Service says most Yellowstone roads “are closed to regular vehicles from early November to late-April.” Its 2026 dates for the East Entrance to Fishing Bridge road over Sylvan Pass are May 1 to October 31. Yellowstone National Park: park roads
- For this passYellowstone National Park: park roads
- For this passYellowstone National Park: current conditions
- Wyoming · WYDOTWyoming 511 road conditions
Check the official National Weather Service forecast for the summit and the road report before you leave.
Crossing Sylvan 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 Sylvan Pass
How high is Sylvan Pass?
The summit is 8,530 ft above sea level, on US-14/16/20.
How far is Sylvan Pass from Cody and Fishing Bridge?
By road, the summit is 59 miles from Cody, WY and 18 miles from Fishing Bridge, WY.
Is Sylvan Pass open in winter?
No. The National Park Service says most Yellowstone roads “are closed to regular vehicles from early November to late-April.” Its 2026 dates for the East Entrance to Fishing Bridge road over Sylvan Pass are May 1 to October 31.
What is the wettest month at Sylvan Pass?
December. The Sylvan Lake snow-monitoring site (8,420 ft, 2 mi northwest of the summit) averages 4.3 inches of precipitation that month, counting the water in melted snow (1991–2020 normals).
How cold does it get near Sylvan Pass?
The coldest month is January. Lake Yellowstone (7,892 ft, 15 mi northwest of the summit) averages a low of 3°F then (1991–2020 normals); the summit is 638 ft higher.