CLIMATE The influence of the monsoon is weak. Mean annual rainfall at Palmar and Sirshi (1,761m), located near the periphery of the national park, is 827mm and 741mm, respectively. Preciptation is maximal and in excess of 100mm per month in March and April, and again in July and August. Most snow falls in December and January when the whole area becomes snowbound. Mean maximum and minimum temperatures recorded at Sirshi are 13*C and -7*C in January and 35*C and 11*C in July, respectively (Kurt, 1976; Bacha, 1986).

VEGETATION Based on the revised classification of Champion and Seth (1968), some 13 vegetation types are represented (Bacha, 1986). In general, silver fir Abies pindrow and spruce Picea wallichiana, mixed with cedar Cedrus deodara and blue pine Pinus griffithii are predominant from 2,400m to 3,000m. Notable is the small expanse of chilgoza pina P. gerardiana in the Dachan Range. At lower altitudes (1,700-2,400m) occur nearly pure stands of cedar and blue pine, and moist temperate deciduous forest, represented by horsechestnut Aesculus indica, walnut Juglans regia, maple Acer spp., poplar Populus ciliata, hazel Corylus cornuta, bird cherry Padus cornuta, ash Fraxinus cornuta and yew Taxus wallichiana. The sub-alpine zone, from 3,000m to the tree line at 3,700m, supports mostly silver fir and birch Betula utilis forest and this merges with birch-rhododendron Rhododendron campanulatum scrub, above which is alpine pasture.