Four seasons constitute the climate of Rajasthan:

Pre-Monsoon:

Time:
April to June

Characteristics:
The Hottest Season. Temperature sore from 32 degrees to 45 degrees centigrade. In the west temperatures rise up to 48 degrees, particularly in May and June. Mount Abu registers the lowest temperature

Monsoon:

Time:
July to September

Characteristics:
Temperature drops and humidity rises. About 90 percent of Rainfall occurs during this time.

Post Monsoon                                      

Time:
October to December

Characteristics:
best season to visit Rajasthan, pleasant atmosphere, with temperature between 33 degrees to 38 degrees max.

Winter:

Time:                                                  
January to March