Climate of Sonipat is dry with hot summer and a cold winter. The weather becomes milder during the monsoon (period July to September). The post-monsoon months October and November constitute a transition period, prior to the onset of winter.
The winter starts in December when day and night temperatures fall rapidly. January is the coldest month when the mean daily minimum temperature is 6 to 7 C. During cold waves, the minimum temperature may go down to the freezing point of water, and frosts can occur. During the summer months of May and June, the maximum temperature sometimes reaches 47°C. Temperature drops considerably with the advancement of monsoon in June. However, the night temperature during this period continues to be high.
The annual rainfall varies considerably from year to year. However, the maximum rainfall is experienced during the monsoon season, which reaches its peak in the month of July. In fact, the monsoon period accounts for 75% of the annual rainfall in the district. On an average there are 24 days in a year with rainfall of 2.5 mm (or more) per day in district Sonepat. Humidity is considerably low during the greater part of the year. The district experiences high humidity only during the monsoon period. The period of minimum humidity (less than 20%) is between April and May. During the monsoon, the sky is heavily clouded, and winds are strong in this period. Winds are generally light during the post-monsoon and winter months
