Summit forecast for 4,043 ft · Sandwich · Updated 3x daily
As of July 21, 2026
Mount Passaconaway (4,043 ft) is currently 54°F (feels like 48°F) with overcast and S winds at 11 mph, gusting to 23 mph. Today's freezing level is 13,091–14,140 ft. Expect the summit to run about 8°F colder than the trailhead. Trail conditions are rated Difficult.
Valley forecasts don't apply up high — temperatures drop about 3.0°F per 1,000 ft on Mount Passaconaway.
| Elevation | Temp Range | Max Wind | Wind Chill (Low) |
|---|---|---|---|
| Summit 4,043 ft | 56° – 60°F | 33 mph | 56°F |
| Treeline 4,000 ft | 56° – 60°F | 32 mph | 56°F |
| Trailhead 2,000 ft | 61° – 68°F | 19 mph | 61°F |
Freezing level today: 13,091–14,140 ft
~3°F drop per 1,000ft
Tap a day header to expand to 3hr or hourly detail
Today Jul 21 | Tomorrow Jul 22 | Thursday Jul 23 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| AM | PM | night | AM | PM | night | AM | PM | night | |
| Temperature & Wind | |||||||||
| Weather | cloudy | rain | rain | cloudy | sunny | cloudy | sunny | sunny | sunny |
| Temp °F hi / lo | 57° 56° | 60° 56° | 60° 58° | 58° 57° | 61° 59° | 58° 42° | 46° 42° | 58° 49° | 55° 54° |
| Chill °F | — | — | — | — | — | 32° | 32° | 42° | — |
| Wind mph | 27 | 33 | 34 | 34 | 29 | 25 | 26 | 23 | 19 |
| Gust mph est. | 43 | 53 | 54 | 54 | 45 | 40 | 42 | 37 | — |
| Storm risk | — | — | — | mod | mod | — | — | — | — |
| Precipitation | |||||||||
| Precip in (rain/snow) | - | 0.2 | 0.3 | - | - | - | - | - | - |
| Freezing ft | 13,803 ft | 13,465 ft | 9,588 ft | ||||||
| Conditions | |||||||||
| Cloud cover | 100% | 100% | 100% | 100% | 13% | 100% | - | 6% | 5% |
| Vis mi | clear | 2 | <0.1 | 8 | clear | clear | clear | clear | clear |
| UV | 6 | 7 | — | 3 | 7 | — | 6 | 8 | — |
Tap a day header to expand AM/PM/Night detail
| Elevation | Today Jul 21 | Tomorrow Jul 22 | Thursday Jul 23 |
|---|---|---|---|
| lo/hi °F · wind mph & dir · chill °F | |||
| Summit 4,043 ft | 56/57° 27 | 57/58° 34 | 42/46° 26 |
| 3,300 ft | 58/59° 25 | 60/62° 28 | 45/51° 20 |
| 2,500 ft | 60/62° 20 | 62/66° 19 | 47/55° 17 |
| Trailhead 2,000 ft | 61/64° 15 | 64/68° 16 | 46/58° 12 |
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 July 21, 2026: Mount Passaconaway (4,043 ft) is currently 54°F (feels like 48°F) with overcast and S winds at 11 mph, gusting to 23 mph. Today's freezing level is 13,091–14,140 ft. Expect the summit to run about 8°F colder than the trailhead. Trail conditions are rated Difficult.
Temperatures drop roughly 3.0°F per 1,000 ft of elevation on Mount Passaconaway. Today the trailhead (2,000 ft) tops out around 68°F while the summit (4,043 ft) reaches about 60°F, with a wind chill as low as 56°F.
Winds at the summit of Mount Passaconaway are forecast to reach 33 mph today, with 32 mph at treeline. Above treeline there is no shelter from wind — plan layers around wind chill, not air temperature.
Today's freezing level (13,091–14,140 ft) is above the 4,043 ft summit of Mount Passaconaway, so the full route should stay above freezing.