Climate varies from semi Tropical to semi Arctic with average summer daytime temperatures ranging from 28 degrees to 32 degrees. Winter lasts from November to mid March. Snowfall is common in Alpine treks (generally above 2200 meters – in higher trans Himalayan regions)

Spring (April-May): Temperate weather and good time to visit.
Summer (June- August): Great time to visit. Mornings are sunny, nights are cool. Rains start in late July/early August. GHNP receives 1100- 1500 mm of precipitation during monsoon season.

Fall (September - Mid November): Temperate weather like spring, Best time to visit.
Winter (Mid November – March): Cool to blizzard conditions. Low temperatures. Snow fall occurs throughout the park and persists above 3000 meters till March.