The best time to climb in Squamish

Ten years of hourly weather, graded for climbable days and friction quality. Two different questions decide a trip: how much you can climb, and how good it feels when you do. July and August win on volume, with about four climbable days in five. The very best friction clusters in spring: April and May pair dry stretches with cool air, and roughly one day in six grades prime, the top 5% of the decade. September is the beloved classic, every other day climbable with crisp mornings returning late in the month. From November to February the granite is mostly wet, with rare gift days.

• January and February: mostly shut, a handful of days all winter.
• March: about one day in five, cold and crisp when it works.
• April and May: the year's best friction odds, roughly one prime day in six.
• June: better than every other day, long daylight.
• July and August: about four days in five, friction average in the heat.
• September: every other day, the classic Sendtember cool-down late in the month.
• October: about one day in five, prime when a dry spell lines up.
• November and December: storm season, plan around gifts.