Climatic Regions of Rajasthan

Introduction Climatic Regions of Rajasthan

Climatic regions are those regions where all the factors of the climate generally remain the same for a particular region. Different experts divided the state of the Rajasthan in different climatic regions based on rainfall, temperature, evaporation, vegetation etc.

Classifications of Climatic Regions of Rajasthan

However, three main approaches for dividing the region in climatic regions are as follows –

1. Basic Classification.
2. Koeppen’s Classification.
3. Thornthwaite’s Classification.

Basic Classification of Climatic Regions of Rajasthan

The State of Rajasthan can be divided into following climatic regions based on the distribution of rainfall and variation of temperature.

Basic Classification of Climatic Regions of Rajasthan based on Rainfall and Temperature
Basic Classification of Climatic Regions of Rajasthan based on Rainfall and Temperature
Arid Region
  • The Arid region includes the Jaisalmer, Hanumangarh, Eastern Barmer, Southern Shri Ganganagar and Western Bikaner and Jodhpur districts of the Rajasthan.
  • The average temperature in this region is 35-40°C in the summer season and 15-16°C in the winter season. Due to high temperature, the rate of evaporation is high in this region.
  • The average rainfall in western part of this region is 0-10cm and another part of this region is 10-20cm. This climatic region has no vegetation. This region is full of sand dunes.
  • The climate of this region is very serve. Due to hot and arid climate, winds full of sand and ‘Loo’ are the main features of this region.
Semi-arid Region
  • The semi-arid region includes the Shri Ganganagar, Hanumangarh, Churu, Southern Barmer, Eastern parts of Bikaner and Jodhpur and western parts of Pali, Jalore, Sikar, Nagaur and Jhunjhunu districts of the Rajasthan.
  • The average temperature in this region is 30-36°C in summer season and 10-17°C in winter season.
  • The average rainfall in this region is 20-40cm.
  • Since the nature of rainfall is erratic as well as torrential, generally it brings the flood with it.
  • Thorny bushes and grass are the main vegetation of this region.
Sub-humid Region
  • The sub-humid region includes the Alwar, Japur, Ajmer, Pali, Jalore, Eastern parts of Nagaur and Jhunjhunu and north-west part of Tonk, Bhilwara and Sirohi districts of the Rajasthan.
  • The average temperature in this region is 28-34°C in summer season and 12-18°C in winter season.
  • The average rainfall in this region is 40-60cm. The rainfall is limited to the few monsoon months only.
  • This region has the steppe type of Vegetation.
Humid Region
  • The humid region includes the Bhartpur, Dholpur, Kota, Bundi, Sawai Madhopur, North-west Udaipur, South-east Tonk and Chittorgarh districts of the Rajasthan.
  • The average temperature in this region is 32-35°C in summer season and 14-17°C in winter season.
  • The average rainfall in this region is 60-80cm. During the winter season, the rainfall is generally associated with cyclones.
  • This region has the deciduous types of trees.
  • The famous Ranthambore National Park and Keoladeo National Park are also situated in this region.
Very Humid Region
  • The very humid region includes the south-east Kota, Baran, Jhalawar, Baswara, Pratapgarh and south-west Udaipur districts and Mount Abu region of the Rajasthan.
  • The average temperature in this region is 30-34°C in summer season and 12-18°C in winter season.
  • The average rainfall in this region is 80-150cm.
  • This region has the Mansoon Savana types of vegetation.
Koppen’s Classification of Climatic Regions of Rajasthan

Koppen’s classification of world climatic regions is totally based on the vegetation. The effect of rainfall and temperature is directly visible on it. According to Koppen’s classification, Climatic Regions of Rajasthan can be classified into four parts –

Koppen’s Classification of Climatic Regions of Rajasthan based on the Vegetation
Koppen’s Classification of Climatic Regions of Rajasthan based on the Vegetation
Aw or Tropical Humid Region
  • The region includes the southern parts of Dungarpur and Banswara districts of the Rajasthan.
  • Arid tropical grasslands and Savanna like region are found along with deciduous trees of Monsoon type.
  • Winter season is arid and cool whereas summers experience scorching heat.
  • Rainfall mainly occurs in the summer season.
  • The average temperature in this region is 30-34°C in summer season and 18-20°C in winter season.
Bshw Climatic Region
  • The region includes Barmer, Jalore, Jodhpur, Nagaur, Churu, Sikar, Jhunjhunu and Hanumangarh districts of the Rajasthan.
  • The vegetation is of steppe type, mainly with thorny bushes and grasses.
  • The climate of this region is semi-arid and there is no sufficient rain during the whole year in this region.
  • The average temperature in this region is 30-36°C in summer season and 10-17°C in winter season.
Bwhw Climatic Region
  • The region includes north-west Jodhpur, Jaisalmer, and western parts of Bikaner and Shri Ganganagar districts of the Rajasthan.
  • The climate of this region is arid-hot desert with very less rainfall. There is very high rate of evaporation also. Due to this type of climate, there is no vegetation in this region.
  • The average temperature in this region is 40-35°C in summer season and 14-18°C in winter season.
Cwg Climatic Region
  • The region includes north-eastern area of Aravalli Range i.e. Alwar, Bharatpur, Jaipur, Dausa, Karoli, Dhoplpur, Ajmer, Tonk, Sawai Madhopur, Rajsamand, Bhilwara, Bundi, Kota and northern parts of Baran and Chittorgarh districts of the Rajasthan.
  • There is a good amount of rain in this region. However rain is limited to the few monsoon months only.
  • This region has mostly the deciduous types of trees.
  • Seasonal winds do not bring rains to this region during winters.
Thornthwaite’s Classification of Climatic Regions of Rajasthan

Thornthwaite’s Classification of world climatic regions is based on the vegetation, however, amount of rainfall and distribution of temperature is also taken into account. According to Thornthwaite’s Classification, Climatic Regions of Rajasthan can be classified into four parts –

Thornthwaite’s Classification of Climatic Regions of Rajasthan based on the Vegetation, Temperature and Rainfall
Thornthwaite’s Classification of Climatic Regions of Rajasthan based on the Vegetation, Temperature and Rainfall

CA’w Climatic Region
  • The region includes north-eastern parts of Udaipur and Baswara, dungarpur, Kota and Jhalawar districts of Rajasthan.
  • Monsoon and Savana type of vegetation are found here.
  • This region is characterized by wet summers and dry winters.
DA’w Climatic Region
  • The region includes middle, south and eastern parts of the Rajasthan i.e. Sirohi, East Jalore, Pali, Ajmer, Chittorgarh, Bundi, Sawai Madhopur, Tonk, Bhilwara, Bharatpur, Jaipur, Dausa, Alwar, Sikar and Jhunjhunu districts of the Rajasthan.
  • There is high temperature in the summer in this region.
  • Rainfall is very less and semi deserted vegetation is found in this area.
DB’w Climatic Region
  • The region includes northern parts of the Rajasthan i.e. Shri Ganganagar, Hanumangarh, Churu and Bikaner districts of the Rajasthan.
  • The region has short and dry winters while summers are long and associated with good rains.
  • Thorny bushes and semi-arid vegetation are found here.
EA’d Climatic Region
  • The region is also known as Marusthai and includes the Barmer, Jaisalmer, Western part of Jodhpur and the south-west Bikaner Districts of the Rajasthan.
  • The average temperature in this region is 35-40°C in summer season and 15-16°C in winter season. Due to high temperature, the rate of evaporation is high in this region.
  • The average rainfall in western part of this region is 0-10cm and other part of this region is 10-20cm.
    This climatic region has no vegetation. This region is full of sand dunes.
  • The climate of this region is very serve. Due to hot and arid climate, winds full of sand and ‘Loo’ are the main features of this region.
Reference Article / Website / Book

Rajasthan Climatic Regions at Wikipedia


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