Summit forecast for 3,565 ft · Mahoosuc Range · Updated 3x daily
As of September 4, 2026 at 1:20 PM ET
Mount Success (3,565 ft) is currently 61°F (feels like 59°F) with clear sky and NW winds at 13 mph, gusting to 20 mph. Today's freezing level is 10,269–13,255 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 Mount Success.
| Elevation | Temp Range | Max Wind | Wind Chill (Low) |
|---|---|---|---|
| Summit 3,565 ft | 55° – 61°F | 24 mph | 55°F |
| Trailhead 2,000 ft | 60° – 68°F | 17 mph | 60°F |
Freezing level today: 10,269–13,255 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 | sunny | fog | cloudy | cloudy | cloudy | cloudy | drizzle | cloudy |
| Temp °F hi / lo | 58° 56° | 60° 59° | 58° 53° | 53° 50° | 51° 50° | 50° 46° | 48° 45° | 54° 51° | 51° 50° |
| Chill °F | — | — | — | 44° | 44° | 38° | 37° | — | 43° |
| Wind mph | 20 | 24 | 22 | 16 | 19 | 24 | 21 | 26 | 25 |
| Gust mph est. | 32 | 38 | 35 | 26 | 26 | 38 | 27 | — | — |
| Storm risk | mod | mod | — | — | — | — | — | — | — |
| Precipitation | |||||||||
| Precip in (rain/snow) | - | - | - | - | - | - | - | - | - |
| Freezing ft | 11,280 ft | 9,311 ft | 8,093 ft | ||||||
| Conditions | |||||||||
| Cloud cover | 100% | 16% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| Vis mi | 0.2 | clear | <0.1 | 0.7 | 9 | 8 | 10 | 9 | clear |
| UV | 5 | 6 | — | 2 | 2 | — | 5 | 6 | — |
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| Elevation | Today Sep 4 | Tomorrow Sep 5 | Sunday Sep 6 |
|---|---|---|---|
| lo/hi °F · wind mph & dir · chill °F | |||
| Summit 3,565 ft | 56/58° 20 | 50/53° 16 | 45/48° 21 |
| 3,300 ft | 57/59° 20 | 51/54° 16 | 46/49° 21 |
| 2,500 ft | 59/63° 15 | 54/56° 12 | 49/53° 19 |
| Trailhead 2,000 ft | 60/65° 12 | 56/58° 10 | 50/56° 16 |
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 Success (3,565 ft) is currently 61°F (feels like 59°F) with clear sky and NW winds at 13 mph, gusting to 20 mph. Today's freezing level is 10,269–13,255 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 Mount Success. Today the trailhead (2,000 ft) tops out around 68°F while the summit (3,565 ft) reaches about 61°F, with a wind chill as low as 55°F.
Winds at the summit of Mount Success are forecast to reach 24 mph today. Above treeline there is no shelter from wind — plan layers around wind chill, not air temperature.
Today's freezing level (10,269–13,255 ft) is above the 3,565 ft summit of Mount Success, so the full route should stay above freezing.