Summit forecast for 4,328 ft · Franconia · Updated 3x daily
As of September 5, 2026 at 1:20 PM ET
Mount Flume (4,328 ft) is currently 52°F (feels like 49°F) with overcast and N winds at 10 mph, gusting to 14 mph. Today's freezing level is 8,825–11,286 ft. Expect the summit to run about 9°F colder than the trailhead. Trail conditions are rated Moderate.
Valley forecasts don't apply up high — temperatures drop about 3.2°F per 1,000 ft on Mount Flume.
| Elevation | Temp Range | Max Wind | Wind Chill (Low) |
|---|---|---|---|
| Summit 4,328 ft | 48° – 52°F | 23 mph | 40°F |
| Treeline 4,000 ft | 49° – 53°F | 23 mph | 42°F |
| Trailhead 2,000 ft | 57° – 61°F | 10 mph | 57°F |
Freezing level today: 8,825–11,286 ft
~3.2°F drop per 1,000ft
Tap a day header to expand to 3hr or hourly detail
Today Sep 5 | Tomorrow Sep 6 | Monday Sep 7 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| AM | PM | night | AM | PM | night | AM | PM | night | |
| Temperature & Wind | |||||||||
| Weather | drizzle | cloudy | cloudy | cloudy | cloudy | cloudy | cloudy | cloudy | drizzle |
| Temp °F hi / lo | 51° 48° | 51° 49° | 50° 44° | 45° 43° | 47° 46° | 45° 42° | 48° 43° | 55° 49° | 53° 48° |
| Chill °F | 41° | 43° | 37° | 35° | 38° | 31° | 33° | 41° | 39° |
| Wind mph | 21 | 16 | 15 | 18 | 24 | 29 | 25 | 28 | 30 |
| Gust mph est. | 34 | 26 | 24 | 29 | 38 | 46 | 40 | 33 | — |
| Storm risk | — | — | — | — | — | — | — | — | — |
| Precipitation | |||||||||
| Precip in (rain/snow) | - | - | - | - | - | - | - | - | 0.1 |
| Freezing ft | 9,610 ft | 8,322 ft | 11,481 ft | ||||||
| Conditions | |||||||||
| Cloud cover | 100% | 100% | 100% | 100% | 100% | 100% | 50% | 100% | 100% |
| Vis mi | 0.2 | 8 | 8 | 8 | clear | 8 | 9 | clear | clear |
| UV | 4 | 4 | — | 5 | 6 | — | 5 | 6 | — |
Tap a day header to expand AM/PM/Night detail
| Elevation | Today Sep 5 | Tomorrow Sep 6 | Monday Sep 7 |
|---|---|---|---|
| lo/hi °F · wind mph & dir · chill °F | |||
| Summit 4,328 ft | 48/51° 21 | 43/45° 18 | 43/48° 25 |
| 4,100 ft | 49/52° 21 | 44/46° 17 | 44/49° 25 |
| 3,300 ft | 52/54° 17 | 47/49° 14 | 47/53° 20 |
| 2,500 ft | 55/56° 12 | 50/53° 12 | 49/57° 13 |
| Trailhead 2,000 ft | 57/58° 9 | 51/55° 11 | 49/60° 11 |
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 5, 2026 at 1:20 PM ET: Mount Flume (4,328 ft) is currently 52°F (feels like 49°F) with overcast and N winds at 10 mph, gusting to 14 mph. Today's freezing level is 8,825–11,286 ft. Expect the summit to run about 9°F colder than the trailhead. Trail conditions are rated Moderate.
Temperatures drop roughly 3.2°F per 1,000 ft of elevation on Mount Flume. Today the trailhead (2,000 ft) tops out around 61°F while the summit (4,328 ft) reaches about 52°F, with a wind chill as low as 40°F.
Winds at the summit of Mount Flume are forecast to reach 23 mph today, with 23 mph at treeline. Above treeline there is no shelter from wind — plan layers around wind chill, not air temperature.
Today's freezing level (8,825–11,286 ft) is above the 4,328 ft summit of Mount Flume, so the full route should stay above freezing.