3,565 ft · Mahoosuc Range · month-by-month from 251 observed days
3,565 ft | Mahoosuc | 0 routes
May through September is the reliable window: 96% of observed days rated Good or Moderate. February was the toughest month, with 89% of days at Difficult or worse.
Bar shows the share of observed days at each severity; the number is the share rated Good or Moderate. Good · Moderate · Difficult · Dangerous
| Month | Days observed | Good/Moderate | Recurring hazards |
|---|---|---|---|
| February | 27 | 11% | severe wind chill, ice, snow, dangerous wind |
| March | 29 | 14% | ice, snow, severe wind chill |
| April | 30 | 43% | ice, mud, severe wind chill, snow |
| May | 31 | 81% | mud, ice, severe wind chill |
| June | 30 | 97% | mud, ice |
| July | 31 | 100% | mud |
| August | 31 | 100% | mud, severe wind chill |
| September | 30 | 100% | mud, severe wind chill |
| October | 12 | 100% |
Right now on Mount Success
Difficultupdated Oct 17, 3 AMMay through September is the reliable window: 96% of observed days rated Good or Moderate. February was the toughest month, with 89% of days at Difficult or worse.
Yes, with winter gear and experience: in our observations, 88% of December-March days rated Difficult or Dangerous. Full winter traction, insulation, and a hard turnaround plan are the baseline; check live conditions the morning you go.
Methodology: severity shares are observed, not forecast. Each day's rating is the consensus of our AI-synthesized condition reports for Mount Success that day, collected since February 2026 (251 days so far). Months keep filling in as the archive grows. Pair the history with the live report and a summit forecast before you commit to a drive.
| severe wind chill, mud, ice, dangerous wind |