Kunzum Pass, Himachal Pradesh is at an elevation of almost 4,551 meters or 14,931 feet. Its climate is extreme because it is this high up on the Himalayas. The temperature at Kunzum Pass changes a lot with seasons, and it is well known to be freezing below in winters and relatively mild, cool during summers.

Winter: November to May

Temperature: from -20°C/ - 5°C/ - 4°F/ 23°F
Climate: Extremely cold with massive snowfall. In winter, Kunzum Pass is fully covered under the snow, and is several feet in depth so that the road is unpassable. The pass remains closed to vehicles during these months due to the layers of snow and ice. Temperature as low as -20°C or even lower during nights.

Summer (June to September)

Temperature Range: 5°C to 15°C (41°F to 59°F)
Weather: Dry and pleasant. This is the best time to visit Kunzum Pass, when melting snow and all the roads are open. For the day, it is pleasantly cool ranging between 5°C to 15°C, though there may be a dip near or even below freezing degrees at night. The weather remains mostly clear, providing majestic views of the mountains around.

Autumn (October)
Temperature Range: -5°C to 10°C (23°F to 50°F)
Weather: Cooling down with the scattered fall of snow. By October, the weather starts to become cold, and even the first fall of snow can occur, at least in the latter half of the month. The roads may remain open till heavy snowfall starts, but it may be different. The view is largely fairly open with cold weather marking the beginning of the winter closure.

Important Touring Instructions for Kunzum Pass

Wear layered clothing: Even in the summer, it could be too cold at high altitudes, so be prepared and carry warm clothing.
Weather check: At such a high altitude, the weather can change suddenly. So, check out the road report and weather first before stepping out.
Preparation for altitude: Altitude sickness is one such problem that might occur at these heights, so get acclimatized and drink plenty of water.
The preferred visiting period to visit Kunzum Pass would be during June to early October, as the temperatures would be relatively manageable and accessible by road.