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.

Best Time to Visit
NovemberOctoberDecember
Temperature & Rainfall
Temperature Range
14°
Warmest Month
-27°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of -22°C and lows of -33°C. Light rainfall, partly cloudy skies, and breezy conditions.

43 Poor

Comfort

-27°
Feels Like Freezing
-27°C
Temperature
-33° -22°
54%
Humidity
Humid

Weather

19 mm
Rainfall
6.6 m/s
Wind
Breezy
1.2
UV Index
High
10.4h daylight

February

February is freezing with highs of -22°C and lows of -32°C. Light rainfall, partly cloudy skies, and breezy conditions.

43 Poor

Comfort

-27°
Feels Like Freezing
-27°C
Temperature
-32° -22°
59%
Humidity
Humid

Weather

16 mm
Rainfall
8.3 m/s
Wind
Breezy
1.7
UV Index
Very High
11.1h daylight

March

March is freezing with highs of -18°C and lows of -30°C. Almost no rain, partly cloudy skies, and breezy conditions.

43 Poor

Comfort

-24°
Feels Like Freezing
-24°C
Temperature
-30° -19°
65%
Humidity
Humid

Weather

1 mm
Rainfall
9.2 m/s
Wind
Breezy
2.4
UV Index
Extreme
11.9h daylight

April

April is freezing with highs of -15°C and lows of -26°C. The driest month with just 0 mm, partly cloudy skies, and breezy conditions.

41 Poor

Comfort

-21°
Feels Like Freezing
-21°C
Temperature
-26° -15°
68%
Humidity
Humid

Weather

0 mm
Rainfall
7.7 m/s
Wind
Breezy
2.6
UV Index
Extreme
12.7h daylight

May

May is freezing with highs of -12°C and lows of -21°C. The driest month with just 0 mm, partly cloudy skies, and windy conditions.

39 Poor

Comfort

-16°
Feels Like Freezing
-16°C
Temperature
-21° -12°
72%
Humidity
Very Humid

Weather

0 mm
Rainfall
10.5 m/s
Wind
Windy
2.8
UV Index
Extreme
13.4h daylight

June

June is freezing with highs of -8°C and lows of -16°C. The driest month with just 0 mm, partly cloudy skies, and windy conditions.

39 Poor

Comfort

-12°
Feels Like Freezing
-12°C
Temperature
-16° -8°
77%
Humidity
Very Humid

Weather

0 mm
Rainfall
11.9 m/s
Wind
Windy
2.8
UV Index
Extreme
13.8h daylight

July

July is freezing with highs of -7°C and lows of -14°C. The wettest month with 97 mm of rain, mostly overcast skies, and breezy conditions.

27 Poor

Comfort

-10°
Feels Like Freezing
-10°C
Temperature
-14° -7°
83%
Humidity
Very Humid

Weather

97 mm
Rainfall
8.9 m/s
Wind
Breezy
2.6
UV Index
Extreme
13.6h daylight

August

August is freezing with highs of -7°C and lows of -14°C. Regular rainfall (90 mm), mostly overcast skies, and breezy conditions.

27 Poor

Comfort

-11°
Feels Like Freezing
-11°C
Temperature
-14° -7°
85%
Humidity
Very Humid

Weather

90 mm
Rainfall
6.9 m/s
Wind
Breezy
2.5
UV Index
Extreme
13.0h daylight

September

September is freezing with highs of -9°C and lows of -17°C. Moderate rainfall (47 mm), partly cloudy skies, and breezy conditions.

35 Poor

Comfort

-13°
Feels Like Freezing
-13°C
Temperature
-17° -9°
82%
Humidity
Very Humid

Weather

47 mm
Rainfall
8.1 m/s
Wind
Breezy
2.5
UV Index
Extreme
12.2h daylight

October

October is freezing with highs of -14°C and lows of -22°C. Light rainfall and breezy conditions.

45 Poor

Comfort

-18°
Feels Like Freezing
-18°C
Temperature
-22° -14°
65%
Humidity
Humid

Weather

24 mm
Rainfall
8.4 m/s
Wind
Breezy
2.2
UV Index
Extreme
11.4h daylight

November

November is freezing with highs of -18°C and lows of -28°C. Almost no rain.

49 Poor

Comfort

-23°
Feels Like Freezing
-23°C
Temperature
-28° -19°
54%
Humidity
Humid

Weather

2 mm
Rainfall
5.8 m/s
Wind
Light Breeze
1.5
UV Index
High
10.6h daylight

December

December is freezing with highs of -20°C and lows of -31°C. Light rainfall and breezy conditions.

45 Poor

Comfort

-25°
Feels Like Freezing
-25°C
Temperature
-31° -20°
48%
Humidity
Comfortable

Weather

22 mm
Rainfall
6.5 m/s
Wind
Breezy
1.1
UV Index
High
10.2h daylight

Nearby Attractions to Cho Oyu#