
Summers
Summer months in Rajasthan extend from April to June. Summers are the hottest season in Rajasthan. The day temperature varies between 32o Celsius to 45o Celsius. Sometimes temperatures may rise upto 48o Celsius during afternoons. Though it is a rarity, it is not totally impossible! However, there is much variation in the diurnal range of temperature in Rajasthan. Though day temperatures can melt your bones, they tend to fall considerably at night. The only relief from the hot season is to escape to the only high altitude place in Rajasthan, Mount Abu.
Monsoons
The monsoons in Rajasthan extend from July to September. Rajasthan receives almost 90% of its annual rainfall during this time. The temperatures can vary from 30o Celsius to 40o Celsius. The maximum humidity in Rajasthan is during monsoon. The state receives an average of 100 - 165 mm of rainfall during this time.
Autumn (Post-Monsoons)
The post monsoon season in Rajasthan extends from October to November. The temperature ranges from 33o Celsius to 38o Celsius. There is wide difference between day and night temperature. It starts to get more and more chillier.
Winters
The winter season in Rajasthan is from December to March. January is the coldest month of this season. The average temperature usually ranges from 10o Celsius to 25o Celsius. There is considerable difference between night and day temperatures.