Summit forecast for 3,442 ft · Willey Range · Updated 3x daily
As of August 17, 2026 at 3:40 AM ET
Mount Avalon (3,442 ft) is currently 57°F (feels like 53°F) with foggy and S winds at 13 mph, gusting to 30 mph. Today's freezing level is 13,812–14,993 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 3.6°F per 1,000 ft on Mount Avalon.
| Elevation | Temp Range | Max Wind | Wind Chill (Low) |
|---|---|---|---|
| Summit 3,442 ft | 58° – 66°F | 26 mph | 58°F |
| Trailhead 2,000 ft | 62° – 72°F | 12 mph | 62°F |
Freezing level today: 13,812–14,993 ft
~3.6°F drop per 1,000ft
Tap a day header to expand to 3hr or hourly detail
Today Aug 17 | Tomorrow Aug 18 | Wednesday Aug 19 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| AM | PM | night | AM | PM | night | AM | PM | night | |
| Temperature & Wind | |||||||||
| Weather | drizzle | rain | rain | fog | fog | ptly cloudy | cloudy | drizzle | cloudy |
| Temp °F hi / lo | 61° 58° | 66° 61° | 63° 60° | 59° 57° | 60° 57° | 60° 59° | 64° 59° | 67° 58° | 60° 58° |
| Chill °F | — | — | — | — | — | — | — | — | — |
| Wind mph | 21 | 10 | 7 | 11 | 13 | 9 | 6 | 17 | 6 |
| Gust mph est. | 34 | 16 | 11 | 18 | 21 | 14 | — | 27 | — |
| Storm risk | — | mod | mod | — | — | — | — | — | — |
| Precipitation | |||||||||
| Precip in (rain/snow) | - | 1.5 | 0.1 | - | - | - | - | - | - |
| Freezing ft | 14,598 ft | 14,423 ft | 12,764 ft | ||||||
| Conditions | |||||||||
| Cloud cover | 100% | 100% | 100% | 100% | 100% | 75% | 100% | 100% | 100% |
| Vis mi | <0.1 | <0.1 | <0.1 | <0.1 | <0.1 | clear | clear | clear | clear |
| UV | 0 | 2 | — | 2 | 6 | — | 5 | 6 | — |
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| Elevation | Today Aug 17 | Tomorrow Aug 18 | Wednesday Aug 19 |
|---|---|---|---|
| lo/hi °F · wind mph & dir · chill °F | |||
| Summit 3,442 ft | 58/61° 21 | 57/59° 11 | 59/64° 6 |
| 3,300 ft | 58/61° 20 | 58/59° 11 | 60/65° 5 |
| 2,500 ft | 60/64° 12 | 61/61° 9 | 58/69° 3 |
| Trailhead 2,000 ft | 62/66° 9 | 63/63° 7 | 58/71° 3 |
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 17, 2026 at 3:40 AM ET: Mount Avalon (3,442 ft) is currently 57°F (feels like 53°F) with foggy and S winds at 13 mph, gusting to 30 mph. Today's freezing level is 13,812–14,993 ft. Expect the summit to run about 6°F colder than the trailhead. Trail conditions are rated Moderate.
Temperatures drop roughly 3.6°F per 1,000 ft of elevation on Mount Avalon. Today the trailhead (2,000 ft) tops out around 72°F while the summit (3,442 ft) reaches about 66°F, with a wind chill as low as 58°F.
Winds at the summit of Mount Avalon are forecast to reach 26 mph today. Above treeline there is no shelter from wind — plan layers around wind chill, not air temperature.
Today's freezing level (13,812–14,993 ft) is above the 3,442 ft summit of Mount Avalon, so the full route should stay above freezing.