Summit forecast for 4,004 ft · Presidential · Updated 3x daily
As of July 21, 2026
Mount Isolation (4,004 ft) is currently 54°F (feels like 47°F) with overcast and SSW winds at 14 mph, gusting to 27 mph. Today's freezing level is 12,762–14,239 ft. Expect the summit to run about 8°F colder than the trailhead. Trail conditions are rated Difficult.
Valley forecasts don't apply up high — temperatures drop about 3.0°F per 1,000 ft on Mount Isolation.
| Elevation | Temp Range | Max Wind | Wind Chill (Low) |
|---|---|---|---|
| Summit 4,004 ft | 56° – 59°F | 34 mph | 56°F |
| Treeline 4,000 ft | 56° – 59°F | 34 mph | 56°F |
| Trailhead 2,000 ft | 62° – 67°F | 19 mph | 62°F |
Freezing level today: 12,762–14,239 ft
~3°F drop per 1,000ft
Tap a day header to expand to 3hr or hourly detail
Today Jul 21 | Tomorrow Jul 22 | Thursday Jul 23 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| AM | PM | night | AM | PM | night | AM | PM | night | |
| Temperature & Wind | |||||||||
| Weather | cloudy | rain | rain | cloudy | ptly cloudy | cloudy | ptly cloudy | sunny | sunny |
| Temp °F hi / lo | 57° 56° | 58° 57° | 60° 58° | 60° 58° | 62° 58° | 57° 42° | 45° 41° | 57° 47° | 55° 54° |
| Chill °F | — | — | — | — | — | 33° | 32° | 39° | — |
| Wind mph | 26 | 34 | 32 | 29 | 28 | 19 | 19 | 23 | 10 |
| Gust mph est. | 42 | 54 | 51 | 46 | 45 | 30 | 30 | 37 | — |
| Storm risk | — | — | — | mod | mod | — | — | — | — |
| Precipitation | |||||||||
| Precip in (rain/snow) | - | 0.1 | 0.3 | - | - | - | - | - | - |
| Freezing ft | 13,724 ft | 13,381 ft | 9,672 ft | ||||||
| Conditions | |||||||||
| Cloud cover | 100% | 100% | 100% | 100% | 52% | 90% | 59% | 6% | 5% |
| Vis mi | clear | <0.1 | <0.1 | 8 | 9 | clear | clear | clear | clear |
| UV | 6 | 7 | — | 3 | 7 | — | 5 | 8 | — |
Tap a day header to expand AM/PM/Night detail
| Elevation | Today Jul 21 | Tomorrow Jul 22 | Thursday Jul 23 |
|---|---|---|---|
| lo/hi °F · wind mph & dir · chill °F | |||
| Summit 4,004 ft | 56/57° 26 | 58/60° 29 | 41/45° 19 |
| 3,300 ft | 58/60° 22 | 60/62° 22 | 44/49° 15 |
| 2,500 ft | 60/64° 15 | 63/66° 13 | 46/54° 9 |
| Trailhead 2,000 ft | 62/66° 13 | 65/68° 12 | 48/56° 8 |
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 July 21, 2026: Mount Isolation (4,004 ft) is currently 54°F (feels like 47°F) with overcast and SSW winds at 14 mph, gusting to 27 mph. Today's freezing level is 12,762–14,239 ft. Expect the summit to run about 8°F colder than the trailhead. Trail conditions are rated Difficult.
Temperatures drop roughly 3.0°F per 1,000 ft of elevation on Mount Isolation. Today the trailhead (2,000 ft) tops out around 67°F while the summit (4,004 ft) reaches about 59°F, with a wind chill as low as 56°F.
Winds at the summit of Mount Isolation are forecast to reach 34 mph today, with 34 mph at treeline. Above treeline there is no shelter from wind — plan layers around wind chill, not air temperature.
Today's freezing level (12,762–14,239 ft) is above the 4,004 ft summit of Mount Isolation, so the full route should stay above freezing.