Summit forecast for 4,004 ft · Presidential · Updated 3x daily
As of September 4, 2026 at 8:20 PM ET
Mount Isolation (4,004 ft) is currently 53°F (feels like 45°F) with clear sky and WNW winds at 19 mph, gusting to 31 mph. Today's freezing level is 11,122–13,189 ft. Expect the summit to run about 8°F colder than the trailhead. Trail conditions are rated Moderate.
Valley forecasts don't apply up high — temperatures drop about 3.2°F per 1,000 ft on Mount Isolation.
| Elevation | Temp Range | Max Wind | Wind Chill (Low) |
|---|---|---|---|
| Summit 4,004 ft | 53° – 58°F | 26 mph | 53°F |
| Treeline 4,000 ft | 53° – 58°F | 26 mph | 53°F |
| Trailhead 2,000 ft | 60° – 66°F | 12 mph | 60°F |
Freezing level today: 11,122–13,189 ft
~3.2°F drop per 1,000ft
Tap a day header to expand to 3hr or hourly detail
Friday Sep 4 | Today Sep 5 | Tomorrow Sep 6 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| AM | PM | night | AM | PM | night | AM | PM | night | |
| Temperature & Wind | |||||||||
| Weather | fog | cloudy | rain | ptly cloudy | drizzle | cloudy | cloudy | drizzle | sunny |
| Temp °F hi / lo | 57° 55° | 57° 55° | 55° 53° | 52° 50° | 52° 49° | 48° 45° | 46° 44° | 51° 47° | 48° 47° |
| Chill °F | — | — | — | 45° | 42° | 37° | 36° | 40° | 42° |
| Wind mph | 19 | 25 | 26 | 15 | 20 | 21 | 20 | 20 | 11 |
| Gust mph est. | 30 | 40 | 42 | 24 | 32 | 34 | 32 | 32 | 17 |
| Storm risk | — | — | — | — | — | — | — | — | — |
| Precipitation | |||||||||
| Precip in (rain/snow) | - | - | 0.1 | - | - | - | - | - | - |
| Freezing ft | 11,613 ft | 9,676 ft | 8,122 ft | ||||||
| Conditions | |||||||||
| Cloud cover | 100% | 100% | 100% | 59% | 100% | 100% | 100% | 100% | 15% |
| Vis mi | 0.2 | 8 | 3 | 8 | <0.1 | 8 | clear | clear | clear |
| UV | 5 | 6 | — | 4 | 5 | — | 5 | 6 | — |
Tap a day header to expand AM/PM/Night detail
| Elevation | Friday Sep 4 | Today Sep 5 | Tomorrow Sep 6 |
|---|---|---|---|
| lo/hi °F · wind mph & dir · chill °F | |||
| Summit 4,004 ft | 55/57° 19 | 50/52° 15 | 44/46° 20 |
| 3,300 ft | 57/59° 15 | 53/55° 12 | 47/49° 16 |
| 2,500 ft | 60/63° 9 | 56/58° 7 | 49/53° 13 |
| Trailhead 2,000 ft | 61/65° 8 | 57/60° 6 | 51/55° 12 |
4 more days of forecast — plan around the weather window, not just tomorrow.
Conditions synthesized from: NWS Higher Summits Forecast, NOAA Open-Meteo, Mount Washington Observatory, NETC Trip Reports, NOHRSC Snow Depth, Mt. Washington Avalanche Center, USGS Stream Levels, OpenWeather Air Quality.
AI-generated from public data. Always verify conditions before heading out — backcountry weather can change quickly.
As of September 4, 2026 at 8:20 PM ET: Mount Isolation (4,004 ft) is currently 53°F (feels like 45°F) with clear sky and WNW winds at 19 mph, gusting to 31 mph. Today's freezing level is 11,122–13,189 ft. Expect the summit to run about 8°F colder than the trailhead. Trail conditions are rated Moderate.
Temperatures drop roughly 3.2°F per 1,000 ft of elevation on Mount Isolation. Today the trailhead (2,000 ft) tops out around 66°F while the summit (4,004 ft) reaches about 58°F, with a wind chill as low as 53°F.
Winds at the summit of Mount Isolation are forecast to reach 26 mph today, with 26 mph at treeline. Above treeline there is no shelter from wind — plan layers around wind chill, not air temperature.
Today's freezing level (11,122–13,189 ft) is above the 4,004 ft summit of Mount Isolation, so the full route should stay above freezing.