The climate of Haryana is continental, with extremes of heat in summer. The weather remains hot in summer and markedly cold in winters. The rainfall in the region is low and erratic except in parts of the Karnal and Ambala districts.

The rainfall is unevenly distributed, with Shivalik Hills region being the wettest and the Aravalli Hills region being the driest. About 80% of the rainfall is recorded in the monsoon season (July-September) and sometimes causes local flooding. The autumn crop and spring sowing depend on the season from June to the end of September and the other is the winter rains which occur from December to February, benefiting the Rabi crop.

The best season to visit the state is during the spring seasons from February to April and August to November. Light cotton clothes are recommended for the summer months whereas woolens are required for the winters.