As of October 22, 2026 at 1:20 PM ET
Mount Isolation (4,004 ft) is currently 46°F (feels like 35°F) with clear sky and NNW winds at 17 mph, gusting to 31 mph. Today's freezing level is 3,675–11,614 ft. Expect the summit to run about 4°F colder than the trailhead. Trail conditions are rated Difficult.
Bring microspikes (28°F summit low), a waterproof shell (56 mph summit gusts) and a headlamp (only 10h 37m of daylight). Why these · Paid links, Backcountry.com pays me if you buy.
One email when the first widespread ice reports come in from the Whites, with what to bring. Then the Thursday conditions outlook each week.
Valley forecasts don't apply up high — temperatures drop about 1.4°F per 1,000 ft on Mount Isolation.
| Elevation | Temp Range | Max Wind | Wind Chill (Low) |
|---|---|---|---|
| Summit 4,004 ft | 31° – 47°F | 35 mph | 15°F |
| Treeline 4,000 ft | 31° – 47°F | 35 mph | 15°F |
| Trailhead 2,000 ft | 38° – 51°F | 18 mph | 28°F |
Freezing level today: 3,675–11,614 ft
Tap a day header to expand to 3hr or hourly detail
Tap a day header to expand AM/PM/Night detail
| Elevation | Today Oct 22 | Tomorrow Oct 23 | Saturday Oct 24 |
|---|---|---|---|
| lo/hi °F · wind mph & dir · chill °F | |||
| Summit 4,004 ft | 44/46° 27 | 28/29° 29 | 37/40° 13 |
| 3,300 ft | 44/45° 25 | 28/30° 25 | 38/41° 11 |
| 2,500 ft | 44/47° 17 | 30/33° 18 | 38/43° 7 |
| Trailhead 2,000 ft | 45/48° 13 | 31/35° 14 | 37/45° 5 |
4 more days of forecast: plan around the weather window, not just tomorrow.
Winter hiker? The Winter Pass is $24 once for the whole week, every week, until April 30, 2027. Nothing renews.
Conditions synthesized from: NWS Higher Summits Forecast, NOAA Open-Meteo, Mount Washington Observatory, NETC Trip Reports, NOHRSC Snow Depth.
As of October 22, 2026 at 1:20 PM ET: Mount Isolation (4,004 ft) is currently 46°F (feels like 35°F) with clear sky and NNW winds at 17 mph, gusting to 31 mph. Today's freezing level is 3,675–11,614 ft. Expect the summit to run about 4°F colder than the trailhead. Trail conditions are rated Difficult.
Temperatures drop roughly 1.4°F per 1,000 ft of elevation on Mount Isolation. Today the trailhead (2,000 ft) tops out around 51°F while the summit (4,004 ft) reaches about 47°F, with a wind chill as low as 15°F.
Winds at the summit of Mount Isolation are forecast to reach 35 mph today, with 35 mph at treeline. Above treeline there is no shelter from wind — plan layers around wind chill, not air temperature.
The freezing level on Mount Isolation today is 3,675–11,614 ft. The summit is 4,004 ft, so expect freezing temperatures on the upper mountain — check trail reports for ice and bring traction if in doubt.
Mount Isolation Trail Conditions
AI conditions, hazards, gear & trail reports
Routes up Mount Isolation
Distance, elevation gain & book time
White Mountains trail reports
Ice, mud and the traction hikers carried this week
Trailhead parking
When the lots fill, from hikers' reports
Paid links. Backcountry.com pays me if you buy. Prices are Backcountry's, checked twice a day.
28°F
Summit low
Microspikes
Summit lows near 28°F, so expect ice on rock and the upper trail.
56 mph
Summit gusts
Waterproof shell
Daytime gusts near 56 mph above treeline, and a shell is what blocks it.
10h 37m
Daylight
Headlamp
Sunset around 5:48 PM, so a late start or a slow descent ends in the dark.
The rest of the list: Winter gear guide · How I pick gear
AI-generated from public data. Always verify conditions before heading out — backcountry weather can change quickly.
Summit forecast for 4,004 ft · Presidential · Updated 3x daily
4,004 ft | Presidential | 1 route