Summit forecast for 3,430 ft · Nash Stream · Updated 3x daily
As of August 16, 2026 at 8:20 PM ET
North Percy Peak (3,430 ft) is currently 57°F (feels like 53°F) with overcast and S winds at 9 mph, gusting to 13 mph. Today's freezing level is 12,828–14,436 ft. Expect the summit to run about 7°F colder than the trailhead. Trail conditions are rated Moderate.
Valley forecasts don't apply up high — temperatures drop about 3.8°F per 1,000 ft on North Percy Peak.
| Elevation | Temp Range | Max Wind | Wind Chill (Low) |
|---|---|---|---|
| Summit 3,430 ft | 50° – 60°F | 27 mph | 42°F |
| Trailhead 2,000 ft | 50° – 67°F | 13 mph | 45°F |
Freezing level today: 12,828–14,436 ft
~3.8°F drop per 1,000ft
Tap a day header to expand to 3hr or hourly detail
Sunday Aug 16 | Today Aug 17 | Tomorrow Aug 18 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| AM | PM | night | AM | PM | night | AM | PM | night | |
| Temperature & Wind | |||||||||
| Weather | fog | cloudy | drizzle | rain | drizzle | rain | rain | cloudy | cloudy |
| Temp °F hi / lo | 53° 51° | 60° 55° | 60° 58° | 60° 58° | 65° 60° | 62° 59° | 58° 56° | 63° 57° | 62° 60° |
| Chill °F | — | — | — | — | — | — | — | — | — |
| Wind mph | 10 | 12 | 31 | 27 | 20 | 11 | 16 | 11 | 10 |
| Gust mph est. | 16 | 19 | 50 | 43 | 32 | 18 | 26 | 17 | — |
| Storm risk | — | — | — | — | mod | mod | — | — | — |
| Precipitation | |||||||||
| Precip in (rain/snow) | - | - | - | 0.2 | 0.0 | 0.8 | 0.1 | - | - |
| Freezing ft | 13,816 ft | 14,364 ft | 14,290 ft | ||||||
| Conditions | |||||||||
| Cloud cover | 99% | 99% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| Vis mi | 0.2 | clear | <0.1 | <0.1 | <0.1 | <0.1 | 0.1 | 10 | clear |
| UV | 4 | 6 | — | 1 | 2 | — | 5 | 6 | — |
Tap a day header to expand AM/PM/Night detail
| Elevation | Sunday Aug 16 | Today Aug 17 | Tomorrow Aug 18 |
|---|---|---|---|
| lo/hi °F · wind mph & dir · chill °F | |||
| Summit 3,430 ft | 51/53° 10 | 58/60° 27 | 56/58° 16 |
| 3,300 ft | 51/53° 10 | 58/60° 27 | 56/58° 17 |
| 2,500 ft | 51/56° 9 | 60/62° 19 | 59/60° 14 |
| Trailhead 2,000 ft | 50/58° 6 | 61/64° 14 | 61/62° 10 |
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 August 16, 2026 at 8:20 PM ET: North Percy Peak (3,430 ft) is currently 57°F (feels like 53°F) with overcast and S winds at 9 mph, gusting to 13 mph. Today's freezing level is 12,828–14,436 ft. Expect the summit to run about 7°F colder than the trailhead. Trail conditions are rated Moderate.
Temperatures drop roughly 3.8°F per 1,000 ft of elevation on North Percy Peak. Today the trailhead (2,000 ft) tops out around 67°F while the summit (3,430 ft) reaches about 60°F, with a wind chill as low as 42°F.
Winds at the summit of North Percy Peak are forecast to reach 27 mph today. Above treeline there is no shelter from wind — plan layers around wind chill, not air temperature.
Today's freezing level (12,828–14,436 ft) is above the 3,430 ft summit of North Percy Peak, so the full route should stay above freezing.