Mount FernowMount Fernow at a Glance
When to Go
Best Time to Visit Mount Fernow
Best visited in mid-summer for accessible routes and more reliable weather; off-season travel requires alpine skills.
Summer
July-September · 5-18°C
Most stable weather and snow-free routes-best for hiking and scrambling.
Late spring
May-June · -2-8°C
Snow remains in upper basins; avalanche risk possible early in the season.
Weather & Climate near Mount Fernow
Climate
Mount Fernow's climate is classified as Tundra - Tundra climate with cold summers (peaking in August) and freezing winters (coldest in December). Temperatures range from -13°C to 16°C. Abundant rainfall (1588 mm/year), wettest in December.
Air Quality:
AQI 31
Good
Temperature & Rainfall
Temperature Range
16°
Warmest Month
-13°
Coldest Month
Monthly Conditions
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | - | -13° - -4° | -14° | 224 mm | - | - | 3.8 m/s | - | - |
| February | - | -11° - -2° | -12° | 167 mm | - | - | 3.5 m/s | - | - |
| March | - | -10° - -3° | -12° | 144 mm | - | - | 3.7 m/s | - | - |
| April | - | -8° - 0° | -9° | 95 mm | - | - | 3.8 m/s | - | - |
| May | - | -4° - 5° | -4° | 97 mm | - | - | 3.8 m/s | - | - |
| June | - | -1° - 9° | 1° | 92 mm | - | - | 3.8 m/s | - | - |
| July | - | 2° - 14° | 6° | 54 mm | - | - | 3.7 m/s | - | - |
| August | - | 3° - 16° | 7° | 63 mm | - | - | 3.5 m/s | - | - |
| September | - | 0° - 11° | 3° | 75 mm | - | - | 3.6 m/s | - | - |
| October | - | -5° - 6° | -4° | 129 mm | - | - | 3.8 m/s | - | - |
| November | - | -10° - -2° | -11° | 218 mm | - | - | 3.8 m/s | - | - |
| December | - | -13° - -5° | -15° | 230 mm | - | - | 3.6 m/s | - | - |
Getting There & Around
How to Get to Mount Fernow
Mount Fernow is accessed by Forest Service roads and trailheads in the central Washington Cascades region. The nearest larger towns vary depending on approach-check US Forest Service maps for precise trailhead locations and seasonal road closures.
Tips for Visiting Mount Fernow
- Trailheads can be accessed from Forest Service roads-check road conditions since high-country roads can be rough or gated seasonally.
- Expect alpine conditions and variable weather even on summer days; pack navigation aids for cross-country travel.
- Permit and wilderness regulations may apply-check with the Washington State Department of Natural Resources or USFS for current rules.