 Varanasi experiences a humid subtropical climate ( Köppen climate classification Cwa ) with large variations between summer and winter temperatures . The dry summer starts in April and lasts until June , followed by the monsoon season from July to October . The temperature ranges between 22 and 46 ° C ( 72 and 115 ° F ) in the summers . Winters in Varanasi see very large diurnal variations , with warm days and downright cold nights . Cold waves from the Himalayan region cause temperatures to dip across the city in the winter from December to February and temperatures below 5 ° C ( 41 ° F ) are not uncommon . The average annual rainfall is 1 @,@ 110 mm ( 44 in ) . Fog is common in the winters , while hot dry winds , called loo , blow in the summers . In recent years , the water level of the Ganges has decreased significantly ; upstream dams , unregulated water extraction , and dwindling glacial sources due to global warming may be to blame . 
 Varanasi <a href='uninflect' title='1'><mark>experiences</mark></a> a humid subtropical climate ( Köppen climate classification Cwa ) with large variations between summer and winter temperatures . The dry summer starts in April and <a href='uninflect' title='2'><mark>lasts</mark></a> until June , followed by the monsoon season from July to October . The temperature <a href='uninflect' title='3'><mark>ranges</mark></a> between 22 and 46 ° C ( 72 and 115 ° F ) in the summers . Winters in Varanasi see very large diurnal variations , with warm days and downright cold nights . Cold waves from the Himalayan region cause temperatures to dip across the city in the winter from December to February and temperatures below 5 ° C ( 41 ° F ) <a href='negative_concord' title='4'><mark>are</mark></a> <a href='negative_concord' title='5'><mark>not</mark></a>uncommon . The average annual rainfall <a href='drop_aux' title='6'><mark>is</mark></a>1 @,@ 110 mm ( 44 in ) . Fog <a href='drop_aux' title='7'><mark>is</mark></a>common in the winters , while hot dry winds , called loo , blow in the summers . In recent years , the water level of the Ganges <a href='been_done' title='8'><mark>has</mark></a> decreased significantly ; upstream dams , unregulated water extraction , and dwindling glacial sources due to global warming may be to blame . 
Varanasi experience a humid subtropical climate ( Köppen climate classification Cwa ) with bigass variations between summer and winter temperatures . da dry summer starts in April and last until June , followed by the monsoon season from July to October . The temperature range between 22 and 46 ° C ( 72 and 115 ° F ) in the summers . Winters in Varanasi see verybigasse diurnal variations , w warm days and downright cold nites . Cold waves from the Himalayan region cuz temperatures to dip across the city in the winter from December to February and temperatures below 5 ° C ( 41 ° F ) ain't uncommon . The average annual rainfall 1 @,@ 110 mm ( 44 in ) . Fog common in tdawinters , while hot dry winds , called loo , blow in the summers . In recent years , the water level of the Ganges done decreased significantly ; upstream dams , unregulated water extraction , and dwindling glacial sources due to global warming may be to blame .