Climate of Himachal Pradesh

There is a huge variation in the climatic conditions of Himachal Pradesh due to variation in altitude (450-6500 metres). The climate varies from hot and sub-humid tropical (450-900 metres) in the southern low tracts, warm and temperate (900-1800 metres), cool and temperate (1900-2400 metres) and cold glacial and alpine (2400-4800 metres) in the northern and eastern high elevated mountain ranges.
By October, nights and mornings are very cold. Snowfall at elevations of nearly 3000 m is about 3 m and lasts from December start to March end. About 4500 m, is perpetual snow.
The spring season starts from mid February to mid April. The weather is pleasant and comfortable in the season.
The rainy season start at the end of the month of June. The landscape lushes green and fresh. During the season streams and natural springs are replenished. The heavy rains in July and August cause a lot of damage resulting into erosion, floods and landslides. Out of all the state districts, Dharamsala receives the highest rainfall, nearly about 3400 mm. Spiti is the driest area of the state (rainfall below 50mm). The reason is that it is enclosed by high mountains on all sides.^[1]

Particulars and Characteristics	Shivalik Zone	Mid-Hill Zone	High hill zone	Trance-Himalayan Zone
Altitude	Up to 800 m	800m-1,600m	1,600m-2,700m	2,700m-3,600m
Type of area	Valley areas and foothills	Hilly and mountain ranges	Alpine zone	Lahaul Spiti and Kinnaur range
Climatic conditions	Sub tropical	Slightly warm temperature	Cool temperature with humidity	Dry and extremely cold conditions
Rainfall in mm.	1,500	1,500-3000	1,000-1,500	500
% of total geographical area	30%	10%	25%	35%
% of total cultivated area	55%	30%	10%	5%

References

1. ^ Climate of Himachal Pradesh @ webindia123.com