Summit forecast for 4,051 ft · Willey · Updated 3x daily
As of July 21, 2026
Mount Tom (4,051 ft) is currently 55°F (feels like 48°F) with overcast and S winds at 11 mph, gusting to 24 mph. Today's freezing level is 12,927–14,337 ft. Expect the summit to run about 7°F colder than the trailhead. Trail conditions are rated Difficult.
Valley forecasts don't apply up high — temperatures drop about 2.8°F per 1,000 ft on Mount Tom.
| Elevation | Temp Range | Max Wind | Wind Chill (Low) |
|---|---|---|---|
| Summit 4,051 ft | 56° – 60°F | 37 mph | 56°F |
| Treeline 4,000 ft | 56° – 60°F | 36 mph | 56°F |
| Trailhead 2,000 ft | 61° – 67°F | 19 mph | 61°F |
Freezing level today: 12,927–14,337 ft
~2.8°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 | cloudy | fog | cloudy | sunny | sunny |
| Temp °F hi / lo | 57° 56° | 59° 56° | 60° 58° | 59° 57° | 61° 58° | 56° 40° | 46° 40° | 57° 48° | 55° 54° |
| Chill °F | — | — | — | — | — | 31° | 30° | 40° | — |
| Wind mph | 27 | 37 | 32 | 30 | 28 | 19 | 24 | 23 | 15 |
| Gust mph est. | 43 | 59 | 51 | 48 | 45 | 30 | 38 | 37 | — |
| Storm risk | — | — | — | mod | mod | — | — | — | — |
| Precipitation | |||||||||
| Precip in (rain/snow) | - | 0.4 | 0.3 | - | - | - | - | - | - |
| Freezing ft | 13,651 ft | 13,073 ft | 9,024 ft | ||||||
| Conditions | |||||||||
| Cloud cover | 100% | 100% | 100% | 100% | 85% | 100% | 81% | 40% | 5% |
| Vis mi | clear | 1 | <0.1 | 8 | 10 | 4 | clear | clear | clear |
| UV | 6 | 7 | — | 2 | 6 | — | 5 | 7 | — |
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| Elevation | Today Jul 21 | Tomorrow Jul 22 | Thursday Jul 23 |
|---|---|---|---|
| lo/hi °F · wind mph & dir · chill °F | |||
| Summit 4,051 ft | 56/57° 27 | 57/59° 30 | 40/46° 24 |
| 3,300 ft | 58/60° 22 | 60/62° 22 | 43/50° 21 |
| 2,500 ft | 60/64° 15 | 63/66° 14 | 46/54° 15 |
| Trailhead 2,000 ft | 61/66° 13 | 64/68° 12 | 48/56° 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 Tom (4,051 ft) is currently 55°F (feels like 48°F) with overcast and S winds at 11 mph, gusting to 24 mph. Today's freezing level is 12,927–14,337 ft. Expect the summit to run about 7°F colder than the trailhead. Trail conditions are rated Difficult.
Temperatures drop roughly 2.8°F per 1,000 ft of elevation on Mount Tom. Today the trailhead (2,000 ft) tops out around 67°F while the summit (4,051 ft) reaches about 60°F, with a wind chill as low as 56°F.
Winds at the summit of Mount Tom are forecast to reach 37 mph today, with 36 mph at treeline. Above treeline there is no shelter from wind — plan layers around wind chill, not air temperature.
Today's freezing level (12,927–14,337 ft) is above the 4,051 ft summit of Mount Tom, so the full route should stay above freezing.