The climate of GHNP is typical of the western Himalaya’s front ranges. It has four distinct seasons: spring (April to June); rainy/summer (July to September); autumn (October to November) and winter (December to March).
Precipitation is moderate for most of the year and abundant during the monsoon, from mid-June to mid-September. In recent years, maximum annual rainfall has been 1,298 mm. During winter, some snow is common at lower elevations, whilst higher elevations can receive snowfall of over two meters.
The ambient temperature can vary from -10ºC in January to 40ºC in June.