Summit forecast for 3,442 ft · Willey Range · Updated 3x daily
As of September 4, 2026 at 1:20 PM ET
Mount Avalon (3,442 ft) is currently 61°F (feels like 58°F) with clear sky and NW winds at 15 mph, gusting to 25 mph. Today's freezing level is 10,827–13,780 ft. Expect the summit to run about 6°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 Mount Avalon.
| Elevation | Temp Range | Max Wind | Wind Chill (Low) |
|---|---|---|---|
| Summit 3,442 ft | 56° – 61°F | 22 mph | 56°F |
| Trailhead 2,000 ft | 60° – 67°F | 13 mph | 60°F |
Freezing level today: 10,827–13,780 ft
~3.8°F drop per 1,000ft
Tap a day header to expand to 3hr or hourly detail
Today Sep 4 | Tomorrow Sep 5 | Sunday Sep 6 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| AM | PM | night | AM | PM | night | AM | PM | night | |
| Temperature & Wind | |||||||||
| Weather | fog | cloudy | fog | fog | rain | cloudy | cloudy | drizzle | drizzle |
| Temp °F hi / lo | 59° 56° | 61° 59° | 58° 53° | 54° 53° | 53° 51° | 50° 48° | 50° 46° | 53° 50° | 50° 49° |
| Chill °F | — | — | — | — | — | 41° | 39° | 43° | 44° |
| Wind mph | 16 | 20 | 22 | 14 | 17 | 19 | 18 | 21 | 12 |
| Gust mph est. | 26 | 32 | 35 | 22 | 27 | 30 | 29 | 34 | — |
| Storm risk | mod | — | — | — | — | — | — | — | — |
| Precipitation | |||||||||
| Precip in (rain/snow) | - | - | - | - | 0.1 | - | - | - | - |
| Freezing ft | 11,731 ft | 9,516 ft | 8,160 ft | ||||||
| Conditions | |||||||||
| Cloud cover | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| Vis mi | 0.2 | 10 | <0.1 | <0.1 | 0.1 | 8 | 4 | clear | clear |
| UV | 5 | 6 | — | 2 | 5 | — | 5 | 6 | — |
Tap a day header to expand AM/PM/Night detail
| Elevation | Today Sep 4 | Tomorrow Sep 5 | Sunday Sep 6 |
|---|---|---|---|
| lo/hi °F · wind mph & dir · chill °F | |||
| Summit 3,442 ft | 56/59° 16 | 53/54° 14 | 46/50° 18 |
| 3,300 ft | 56/59° 15 | 53/55° 13 | 46/51° 17 |
| 2,500 ft | 59/62° 9 | 56/59° 8 | 49/55° 11 |
| Trailhead 2,000 ft | 61/64° 8 | 58/60° 7 | 50/57° 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 September 4, 2026 at 1:20 PM ET: Mount Avalon (3,442 ft) is currently 61°F (feels like 58°F) with clear sky and NW winds at 15 mph, gusting to 25 mph. Today's freezing level is 10,827–13,780 ft. Expect the summit to run about 6°F colder than the trailhead. Trail conditions are rated Moderate.
Temperatures drop roughly 3.8°F per 1,000 ft of elevation on Mount Avalon. Today the trailhead (2,000 ft) tops out around 67°F while the summit (3,442 ft) reaches about 61°F, with a wind chill as low as 56°F.
Winds at the summit of Mount Avalon are forecast to reach 22 mph today. Above treeline there is no shelter from wind — plan layers around wind chill, not air temperature.
Today's freezing level (10,827–13,780 ft) is above the 3,442 ft summit of Mount Avalon, so the full route should stay above freezing.