South Twin Mountain
Location: Grafton County, NH, US
Elevation: 4,892 feet
4 recorded summits
Current Conditions
Weather: Clear sky
Temperature: 56°F
Wind: 18 mph
Humidity: 69%
7-Day Summit Window
Best day: 2026-05-22 (score: 90/100)
- 2026-05-20: Good (75/100) - Chance of precipitation, breezy
- 2026-05-21: Good (80/100) - Clear skies, breezy, cool
- 2026-05-22: Excellent (90/100) - Partly cloudy, calm winds
- 2026-05-23: Excellent (87/100) - Overcast, calm winds
- 2026-05-24: Good (67/100) - Chance of precipitation, calm winds, cool
- 2026-05-25: Good (77/100) - Chance of precipitation, calm winds
- 2026-05-26: Excellent (85/100) - Partly cloudy, breezy
Air Quality
AQI: 45 (Good)
Public Lands
- White Mountain National Forest (NF, USFS)
Part of 3 Challenges
Recent Summits
- 7/19/2023
- 7/7/2018
- 9/4/2011
- 9/4/2011