Cho Oyu Mountain

Sixth-highest mountain in the world, Himalayan massif

Cho Oyu, on the Tibet-Nepal border, ranks among the world's highest mountains (8,188 m). Climbers use its comparatively straightforward routes for high‑altitude experience; the area also offers base‑camp trekking and broad Himalayan panoramas.

Main image

Cho Oyu at a Glance#

About Cho Oyu#

Cho Oyu is an 8,188 metre mountain on the border between Nepal and the Tibet Autonomous Region of China and is the sixth-highest peak in the world. It is widely regarded as among the more accessible of the world’s 8,000-metre mountains.

Climbers approach the mountain via established base camps and fixed-route lines on the main ridges; many expeditions use a northern (Tibetan) approach where logistics and road access are comparatively easier. The mountain sits close to major Sherpa and Tibetan trade routes and offers classic Himalayan high-altitude landscapes and views of neighbouring giants.

Cho Oyu was first climbed in 1954 by an international team led by Austrians and Sherpa climbers. Since then it has been a frequent objective for high-altitude teams because of its relatively moderate technical demands compared with other 8,000-metre peaks.

The peak lies on the Nepal-Tibet border in the Mahalangur Himal section of the Himalaya, roughly west of Mount Everest and accessible from approaches on either the Nepalese or Tibetan side.

  • Elevation: Summit elevation is 8,188 metres, making it the sixth highest mountain on Earth and one of the more frequently climbed 8,000-metre peaks.
  • Climbing status: Cho Oyu is considered one of the technically less difficult 8,000-metre peaks, which contributes to its popularity as an objective for high-altitude climbers.

What to See#

  • North (Tibet) base camp: North (Tibetan) base camp sits at roughly 5,700 metres and is the common starting point for most standard ascent routes on the mountain.
  • Southwest ridge: Southwest ridge is one of the main technical lines used by expedition teams and is approached from the Tibetan side for logistic ease.
  • Nangpa La: Nangpa La pass lies nearby and has historically been an important trade and migration corridor between the Khumbu and Tibetan plateaus.

Tips for Visiting Cho Oyu#

  • Best seasons for Cho Oyu are the pre‑monsoon (April-May) and post‑monsoon (September-October); weather is most stable then and expedition logistics are easier than in the monsoon or winter.
  • Most commercial expeditions approach Cho Oyu from the Tibetan (north) side - organize permits and full logistics through a reputable operator licensed to operate in Tibet/China rather than attempting independent cross‑border access.
  • Plan your acclimatization schedule and summit bids to favor early‑morning summit pushes (before daytime winds pick up); also be prepared for required Chinese/Tibetan climbing permits and fixed‑rope/porter arrangements often handled by your operator.

Best Time to Visit Cho Oyu#

Best visited in the main climbing windows of spring or autumn when weather is most stable for high-altitude mountaineering; expect very cold conditions at altitude.

Spring climbing season
April-May · −25 to 5°C (high-altitude; much colder above base camp)
Generally the most popular time for expeditions: more stable weather windows and lower winds than winter, but still very cold at altitude and technical conditions persist.
Autumn climbing season
September-October · −25 to 5°C (high-altitude; much colder above base camp)
After the monsoon the weather often clears and provides another main climbing window with relatively stable conditions and reduced avalanche risk compared with winter.

Weather & Climate near Cho Oyu#

Climate

Cho Oyu's climate is classified as Ice Cap - Ice Cap climate with freezing summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -33°C to -7°C. Semi-arid with limited rainfall with a pronounced dry season.

Air Quality: AQI 71 Moderate
Best Time to Visit
NovemberOctoberDecember
Temperature & Rainfall
Temperature Range
14°
Warmest Month
-27°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Poor -33° - -22° -41° 19 mm partly cloudy 54% 6.6 m/s 1.2 high 10.4h
February Poor -32° - -22° -42° 16 mm partly cloudy 59% 8.3 m/s 1.7 very high 11.1h
March Poor -30° - -19° -38° 1 mm partly cloudy 65% 9.2 m/s 2.4 extreme 11.9h
April Poor -26° - -15° -33° 0 mm partly cloudy 68% 7.7 m/s 2.6 extreme 12.7h
May Poor -21° - -12° -29° 0 mm partly cloudy 72% 10.5 m/s 2.8 extreme 13.4h
June Poor -16° - -8° -24° 0 mm partly cloudy 77% 11.9 m/s 2.8 extreme 13.8h
July Poor -14° - -7° -20° 97 mm overcast 83% 8.9 m/s 2.6 extreme 13.6h
August Poor -14° - -7° -20° 90 mm overcast 85% 6.9 m/s 2.5 extreme 13.0h
September Poor -17° - -9° -23° 47 mm partly cloudy 82% 8.1 m/s 2.5 extreme 12.2h
October Poor -22° - -14° -30° 24 mm some cloud 65% 8.4 m/s 2.2 extreme 11.4h
November Poor -28° - -19° -35° 2 mm some cloud 54% 5.8 m/s 1.5 high 10.6h
December Poor -31° - -20° -38° 22 mm some cloud 48% 6.5 m/s 1.1 high 10.2h

Nearby Attractions to Cho Oyu#