H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi-75270, Pakistan
Karachi is usually sunny and warm in October with average day temperature of 30-35 °C and the night temperature falling to 20-25 °C.
Except for a section of the coastal area, the climate in Pakistan is relatively dry. Winters from November to February have chilly nights and bright sunny days with severe winter and snow in the Northern Areas. The summers are hot from April to August with heavy rains in July and August in the plains of the Punjab and the Northern Areas. Karachi, however, remains temperate as a pleasant breeze blows from the Arabian Sea.