Changes in Chandigarh climate in last three decades: In its study, the local Meteorological Department had revealed that in last 30 years, the day temperature in winters has increased by 1.5 degree Celsius while the night temperature plunged by 0.7 degree Celsius in the city. It also pointed out that night temperature in summers from March to May has increased by 0.9 Celsius and days became cooler by 0.2 degree Celsius.
The annual rains witnessed increase of 1.7 mm per year in last three decades. Also, the monsoon rainfall increased by 6.1 mm every year. The winter rains in Chandigarh decreased by 0.2 mm every year while the summer downpour dropped off by 2.1 mm per year. The post-monsoon rainfall also decreased by nearly 4.9 mm every year. Increasing pollution levels: According to the statistics with Chandigarh Pollution Control Board, Suspended Particulate Matter (SPM) and Respirable Suspended Particulate Matter (RSPM) exceeds the permissible limit at several primary locations in the city. The places like Sector 17, Industrial area I, Kaimbalwala village recorded high pollution levels last year. The escalating vehicles population in Chandigarh is seen as the major reason for increasing pollution levels here