Weather in Rajasthan

Temperature in Rajasthan

There are distinct temperature range variations diurnal and seasonally throughout the state, revealing the most typical phenomenon of the warm-dry continental climate.
The climate of Rajasthan can be divided into four seasons: Summer, Monsoon, Post-Monsoon and Winter.

Summer Season:

The summer begins in the month of March while the temperature keeps rising progressively through April, May and June. West of Rajasthan and the eastern side of Aravalli Range, in the region of Bikaner, Phalodi, Jaisalmer and Barmer, the maximum daily temperature hovers around 40C to 45C. Sometimes, it even reaches as high a 49C during the summer months.
Nights of summers see a considerable temperature fall with a minimum daily temperature around 20C to 29C. However, Udaipur and Mount Abu, have a pleasanter climate in summers with a relatively lower daily maximum temperature that reaches 38C and 31.5C, respectively.
Summer Season in Rajasthan 
Photo Credits - Neil Cooper
The daily minimum temperature at nights for these two stations hovers around 25C and 22C, respectively. The major portion of the state tat consists of the arid west and the semi-arid mid-west has an average maximum of 45C in June.

Monsoon Season:

The second season Monsoon extends from July to September, temp drops but humidity increases making it very uncomfortable, even when there is slight drop in the temp (35C to 40C).

Post Monsoon Season:

The Post-monsoon period is from Oct to December. The average maximum temperature is 33oC to 38oC, and the minimum is between 18C and 20C.

Winter Season:

The fourth season is the winter or cold season, from January to March. There is a marked variation in maximum and minimum temperatures and regional variations across the state.

To the North West of the Aravallies are Jodhpur, Jaisalmer, Barmer and Bikaner regions, it is the home of arid plains and the shifting sad dunes of the great Thar Desert. In northern parts of Aravallies various forms of sacred groves are maintained.
January is the coldest month in the stare of Rajasthan. The minimum temperatures sometimes fall to -2C in the night at places like Sikar, Churu, Pilani and Bikaner.
The sandy land gets even colder with occasional secondary Western winds that cross the western, northern and eastern Rajasthan during winter months, and even cause light rainfall and chilly winds can be experienced during this period. Most of the Rajasthan, except the southeast Rajasthan comprising of Kota, Bundi and Baran and western Barmer have an average temperature of more than 10C. Due to the cold western winds, the whole of Rajasthan sometimes come under the spell of the cold wave for 2 to 5 days during winters.
There is slight precipitation in the north and north-eastern region of the state, and light winds, predominantly from the north and north-east. At this time, relative humidity ranges from 50% to 60% in the morning, and 25% to 35% in the afternoon.

Rainfall in Rajasthan

Rainfall in Rajasthan 
Rajasthan being the desert area, its climate varies mostly from arid to sub-humid. To the west of the Aravallis, the climate is marked by low rainfall, extreme diurnal and annual temperature, low humidity and high velocity winds. In the east of the Aravallis, the climate is semi-arid to sub-humid marked by lower wind velocity and higher humidity and better rainfall.
The annual rainfall in the state differs significantly. The average annual rainfall ranges from less than 10 cm in north-west part of Jaisalmer region (lowest in the state), to 20 to 30 cm in the regions of Ganganagar, Bikaner and Barmer, 30 to 40 cm in the regions of Nagaur, Jodhpur, Churu and Jalor and more than 40 cm in the regions of Sikar, Jhunjhunun, Pali and the western fringes of the Aravalli range.
The more fortunate eastern side of the Aravallis see 55 cm rainfall in Ajmer to 102 cm rainfall in Jhalawar. Mount Abu in the Sirohi district in the southwest region receives the highest rainfall in the state (163.8 cm).