Summit forecast for 4,140 ft · Sandwich · Updated 3x daily
As of September 4, 2026 at 1:20 PM ET
Middle Tripyramid (4,140 ft) is currently 60°F (feels like 59°F) with mainly clear and NW winds at 10 mph, gusting to 16 mph. Today's freezing level is 10,367–13,780 ft. Expect the summit to run about 10°F colder than the trailhead. Trail conditions are rated Good.
Valley forecasts don't apply up high — temperatures drop about 3.8°F per 1,000 ft on Middle Tripyramid.
| Elevation | Temp Range | Max Wind | Wind Chill (Low) |
|---|---|---|---|
| Summit 4,140 ft | 55° – 59°F | 24 mph | 55°F |
| Treeline 4,000 ft | 55° – 60°F | 24 mph | 55°F |
| Trailhead 2,000 ft | 62° – 69°F | 16 mph | 62°F |
Freezing level today: 10,367–13,780 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 | cloudy | sunny | ptly cloudy | fog | rain | ptly cloudy | ptly cloudy | cloudy | cloudy |
| Temp °F hi / lo | 58° 56° | 58° 57° | 56° 53° | 53° 51° | 51° 48° | 49° 46° | 47° 46° | 51° 48° | 49° 47° |
| Chill °F | — | — | — | — | 41° | 37° | 39° | 40° | 41° |
| Wind mph | 19 | 23 | 25 | 17 | 22 | 26 | 17 | 23 | 16 |
| Gust mph est. | 30 | 37 | 40 | 27 | 35 | 42 | 27 | 37 | 22 |
| Storm risk | mod | — | — | — | — | — | — | — | — |
| Precipitation | |||||||||
| Precip in (rain/snow) | - | - | - | - | 0.2 | - | - | - | - |
| Freezing ft | 11,589 ft | 9,642 ft | 8,342 ft | ||||||
| Conditions | |||||||||
| Cloud cover | 100% | 30% | 77% | 100% | 100% | 72% | 55% | 100% | 100% |
| Vis mi | 1 | clear | 8 | 0.4 | <0.1 | 8 | clear | clear | clear |
| UV | 5 | 6 | — | 2 | 4 | — | 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 4,140 ft | 56/58° 19 | 51/53° 17 | 46/47° 17 |
| 4,100 ft | 56/58° 19 | 51/53° 17 | 46/47° 17 |
| 3,300 ft | 58/61° 17 | 54/55° 16 | 48/52° 15 |
| 2,500 ft | 61/64° 12 | 57/58° 11 | 50/56° 13 |
| Trailhead 2,000 ft | 63/66° 9 | 59/60° 9 | 51/58° 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: Middle Tripyramid (4,140 ft) is currently 60°F (feels like 59°F) with mainly clear and NW winds at 10 mph, gusting to 16 mph. Today's freezing level is 10,367–13,780 ft. Expect the summit to run about 10°F colder than the trailhead. Trail conditions are rated Good.
Temperatures drop roughly 3.8°F per 1,000 ft of elevation on Middle Tripyramid. Today the trailhead (2,000 ft) tops out around 69°F while the summit (4,140 ft) reaches about 59°F, with a wind chill as low as 55°F.
Winds at the summit of Middle Tripyramid are forecast to reach 24 mph today, with 24 mph at treeline. Above treeline there is no shelter from wind — plan layers around wind chill, not air temperature.
Today's freezing level (10,367–13,780 ft) is above the 4,140 ft summit of Middle Tripyramid, so the full route should stay above freezing.