Cerro ArenalesCerro Arenales at a Glance
When to Go
Best Time to Visit Cerro Arenales
The best window for expeditions to Cerro Arenales is the austral summer (December-February) when days are long and conditions are least severe.
Austral summer (climbing season)
December-February · -5°C to 5°C at summit; 5-15°C in valleys
Warmer temperatures and longer daylight make climbs and approaches more feasible, though weather remains unpredictable.
Shoulder summer
November and March · 0-8°C
Fewer storms but still variable; conditions can be good for experienced parties.
Weather & Climate near Cerro Arenales
Climate
Cerro Arenales's climate is classified as Ice Cap - Ice Cap climate with freezing summers (peaking in January) and freezing winters (coldest in July). Temperatures range from -15°C to 0°C. Abundant rainfall (1188 mm/year), wettest in March.
Air Quality:
AQI 61
Moderate
Temperature & Rainfall
Temperature Range
0°
Warmest Month
-15°
Coldest Month
Monthly Conditions
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | - | -7° - 0° | -13° | 83 mm | - | - | 14.5 m/s | - | - |
| February | - | -7° - 0° | -13° | 111 mm | - | - | 12.7 m/s | - | - |
| March | - | -9° - -1° | -15° | 140 mm | - | - | 13.7 m/s | - | - |
| April | - | -11° - -3° | -18° | 119 mm | - | - | 15.1 m/s | - | - |
| May | - | -13° - -6° | -22° | 79 mm | - | - | 16.5 m/s | - | - |
| June | - | -14° - -9° | -25° | 84 mm | - | - | 16.8 m/s | - | - |
| July | - | -15° - -9° | -25° | 92 mm | - | - | 16.0 m/s | - | - |
| August | - | -15° - -8° | -24° | 96 mm | - | - | 14.3 m/s | - | - |
| September | - | -13° - -6° | -21° | 83 mm | - | - | 13.8 m/s | - | - |
| October | - | -12° - -3° | -19° | 93 mm | - | - | 13.9 m/s | - | - |
| November | - | -10° - -2° | -16° | 107 mm | - | - | 13.7 m/s | - | - |
| December | - | -8° - -1° | -14° | 101 mm | - | - | 14.6 m/s | - | - |
Getting There & Around
How to Get to Cerro Arenales
Access is from Coyhaique or Puerto Aysén via regional roads and often requires river crossings or local 4x4 transport. Approaches commonly begin from remote trailheads and require detailed logistical planning; most teams fly into regional airstrips and arrange local transport.
Tips for Visiting Cerro Arenales
- Cerro Arenales is a glaciated volcanic peak; only experienced mountaineers with glacier skills and guides should attempt it.
- Check access permits and local land-use rules - parts of Aysén are in protected areas and require authorization.
- Plan for lengthy approach logistics: travel in southern Chile often involves long drives, gravel roads and limited services.