Yosemite Valley in California's Sierra Nevada hosts some of North America's most established rock climbing routes, with granite formations that have defined modern climbing standards. The climbing areas span from valley floor granite domes like El Capitan and Half Dome to alpine crags at higher elevations, offering thousands of documented routes across multiple disciplines including traditional climbing, sport climbing, and bouldering. Weather patterns show significant seasonal variation, with summer months providing the most stable conditions but also attracting the highest climbing traffic.
| Month | Epic Score | Avg Temp | Avg Wind | Precip | Rating |
|---|---|---|---|---|---|
| January |
12
|
22.8°F | 7.7 mph | 1.92" | ❌ |
| February |
12
|
22.9°F | 8.8 mph | 2.73" | ❌ |
| March |
12
|
22.7°F | 8.9 mph | 2.5" | ❌ |
| April |
12
|
29.9°F | 7.2 mph | 1.25" | ❌ |
| May |
18
|
34.8°F | 7.0 mph | 0.47" | ❌ |
| June |
70
|
49.3°F | 7.9 mph | 0.1" | ✅ |
| July ★ Best |
96
|
57.3°F | 8.6 mph | 0.04" | 🔥 |
| August |
49
|
58.7°F | 8.3 mph | 0.25" | ⚠️ |
| September |
49
|
55.9°F | 8.9 mph | 0.16" | ⚠️ |
| October |
39
|
44.3°F | 7.9 mph | 0.15" | ❌ |
| November |
19
|
35.5°F | 7.4 mph | 0.45" | ❌ |
| December |
15
|
26.0°F | 7.3 mph | 0.63" | ❌ |
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