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When to climb at Guanella Pass
The best months for bouldering at Guanella Pass are October: the coolest, driest spell of the year, when the rock has the best friction. On average, May to August are too wet and November to March are too cold.
Can you climb there today?Today's answer, hour by hour, and the week ahead.Month by month
| Month | Dry days | High / low | Rain | Verdict |
|---|---|---|---|---|
| January | 18 of 31 | -5° / -15° | 45 mm | Cold |
| February | 20 of 28 | -2° / -12° | 37 mm | Cold |
| March | 19 of 31 | 0° / -12° | 75 mm | Cold |
| April | 17 of 30 | 4° / -8° | 68 mm | Good |
| May | 14 of 31 | 8° / -4° | 109 mm | Wet |
| June | 11 of 30 | 16° / 3° | 105 mm | Wet |
| July | 12 of 31 | 20° / 6° | 103 mm | Wet |
| August | 12 of 31 | 19° / 6° | 120 mm | Wet |
| September | 15 of 30 | 15° / 2° | 77 mm | Good |
| October | 22 of 31 | 10° / -2° | 31 mm | Best |
| November | 23 of 30 | 2° / -8° | 37 mm | Cold |
| December | 23 of 31 | 0° / -9° | 33 mm | Cold |
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When is the best time to boulder at Guanella Pass?
The best months for bouldering at Guanella Pass are October: the coolest, driest spell of the year, when the rock has the best friction. On average, May to August are too wet and November to March are too cold.
What's the weather like at Guanella Pass in October?
Highs around 10 °C and lows around -2 °C, with about 9 days of 1 mm of rain or more and 31 mm in all, averaged over 2023 to 2025.
Which month is wettest at Guanella Pass?
June, with about 19 rainy days and 105 mm on average. Most rock dries within a day after a shower, but cracks and pockets can seep for longer.