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Climatological normals of india

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Climatological normals of India are long-term averages of meteorological variables that provide a standard baseline for assessing India's climate and its variations. These normals are typically calculated over a 30-year period and are updated every decade by the India Meteorological Department (IMD).

The most recent set covers the period from 1991 to 2020, replacing the previous 1981-2010 normals.[1] India's climatological normals encompass a wide range of weather conditions due to the country's vast geographic scale and varied topography.

The data includes parameters such as air temperature, precipitation, humidity, wind speed, cloud amounts etc. s for hundreds of weather stations across India. These normals are crucial for understanding regional climate patterns, identifying long-term trends, and supporting various sectors including agriculture, water resource management, and urban planning.

The diverse climate of India, ranging from tropical in the south to alpine and tundra in the Himalayas, is reflected in these normals. They capture key features of India's climate such as the monsoon seasons, which significantly influence precipitation patterns across the country. Climatological normals serve as an important reference for climate research, policy-making, and assessing the impacts of climate change in India.

Definition and Purpose

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Climatological normals of India are long-term averages of meteorological variables calculated over a 30-year period, providing a standard baseline for assessing India's climate and its variations. The World Meteorological Organization (WMO) defines climatological normals as "arithmetic averages of climatological data computed for consecutive periods of thirty years". These normals are crucial for understanding India's diverse climate patterns and serve multiple purposes:

  1. Baseline for climate assessment: They provide a reference point for comparing current weather conditions to long-term averages.
  2. Climate change monitoring: Normals help in identifying long-term climate trends and assessing the impacts of climate change across India's varied geography.
  3. Sectoral planning: They are essential for various sectors such as agriculture, water resource management, urban planning, and energy production.
  4. Weather forecasting: Normals assist meteorologists in making more accurate weather predictions by providing historical context.

The India Meteorological Department (IMD) calculates these normals for numerous weather parameters, including temperature, precipitation, humidity, and wind speed. The normals are updated every decade to reflect the most recent 30-year period, ensuring they remain relevant in the face of changing climate conditions.

Historical Development of the Normals

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The concept of climatological normals in India has a rich history dating back to the early days of organized meteorological observations:

  1. Early beginnings: The India Meteorological Department was established in 1875, marking the start of systematic weather observations across the country.
  2. First publication: The first set of climatological tables for India was published in 1904, based on data from 171 stations.[2]
  3. Standardization: In 1935, the International Meteorological Organization (now WMO) standardized the use of 30-year periods for calculating normals, starting with 1901–1930.
  4. Expansion of network: Over the decades, IMD significantly expanded its network of weather stations, improving the spatial coverage and accuracy of climatological data.
  5. Modernization: The introduction of automated weather stations and advanced data processing techniques in the late 20th century enhanced the quality and quantity of data used for calculating normals.
  6. Recent updates: IMD has consistently updated its climatological normals every decade. The most recent set covers the period from 1991 to 2020, replacing the previous 1981-2010 normals.
  7. Increased parameters: Over time, the range of meteorological parameters included in the normals has expanded, providing a more comprehensive view of India's climate.

List of Observatories

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There are a total of 405 observatories spread across Indian cities and villages from where this data has been collected. Out of this total of 405, 16 are in 12 big cities, 50 in rural areas and remaining (339) are in small and mid-sized cities.[3]

State Station Population City/Town/Village
Andaman and Nicobar Islands Car Nicobar 17841 Village
Hutbay 7075 Village
Kondul 0 Village
LONG ISLAND 1028 Village
Mayabunder 25778

2845

Subdistrict

Village

Nancowry 10634 Village
Port Blair 165754

108058

Subdistrict

Town

Andhra Pradesh Anantapur 2,61,004 Town
Arogyavaram urban
Bapatla 70777 Town
BHADRACHALLAM 50087 Town (Census Town)
CUDDAPAH 22029 Town
DOLPHIN'S urban
GANNAVARAM(A) 1832 Village
HANAMKONDA 3,92,798 Town
HYDERABAD 39,43,323 Town
KAKINADA 312538 Town
KALINGAPATNAM 6,459 Village
KAVALI 82336

90099

Town (M)

Town (M+OG)

KHAMMAM 184210 Town
KURNOOL 296097 Town
MAHBUBNAGAR 157733

190400

Town (M)

Town (M+OG)

MASULIPATNAM 1,69,892 Town
MEDAK 44255

46880

Town (M)

Town (M+OG)

NALGONDA 135744

154326

Town (M)

Town (M+OG)

NANDIGAMA 44,359 Town
NANDYAL 200516

211424

Town (M)

Town (M+OG)

NARSAPUR 6647 Town (Census Town)
NELLORE 499575

547621

Town (M)

Town (M+OG)

NIDADAVOLU 43,809 Town
NIZAMABAD 311152 Town
ONGOLE 204746 Town
RAMGUNDAM 229644 Town
RENTACHINTALA 16,523 Village
TIRMALAI 7741 Town (Census Town)
TIRUPATHY 287482

293421

Town (M)

Town (M+OG)

TUNI 53425 Town
VISHAKHAPATNAM (A) 9,77,771 Town
VISHAKHAPATNAM(VIZAG RS/RW) 9,77,771 Town
ARUNACHAL PRADESH PASIGHAT 24656 Town
ASSAM DHUBRI 63388 Town
DIBRUGARH/MOHANBARI(A) 139565

144063

Town (M)

Town (M+OG)

GUWAHATI 433771

528563

Town (M)

Town (M+OG)

NORTH LAKHIMPUR 59814 Town
RANGIA 27889 Town
SILCHAR 172830

178865

Town (M)

Town (M+OG)

TEZPUR 58559

75540

Town (M)

Town (M+OG)

BIHAR BHAGALPUR 400146 Town
CHAIBASA 69565 Town
CHAPRA 202352 Town
DALTONGANJ 78396 Town
DARBHANGA 296039 Town
DEHRI 137231 Town
DUMKA 47584 Town
GAYA 468614

474093

Town (M)

Town (M+OG)

HAZARIBAGH 142489 Town
JAMSHEDPUR 631364

677350

Town (M)

Town (M+OG)

JAMSHEDPUR (A) 631364

677350

Town (M)

Town (M+OG)

MOTIHARI 126158 Town
MUZAFFARPUR 354,462 Town
PATNA (A) 1684222 Town
PURNEA 282248 Town
RANCHI (A) 1073427 Town
SABOUR 12575 Town (Census Town)
CHHATTISGARH AMBIKAPUR 1,12,449 Town
BAILALDILA Village
JAGDALPUR 125463 Town
PBO RAIPUR 1010433

1027264

Town (M)

Town (M+OG)

RAIPUR 1010433

1027264

Town (M)

Town (M+OG)

RAIPUR MANA 11953 Town
DAMAN & DIU DIU 23991 Town
GOA DABOLIM N.A.S. 6027 Village
MARMUGAO 94,393 Town
PANJIM 40017

70991

Town (M)

Town (M+OG)

GUJARAT AHMADABAD 55,77,940 Town
AMRELI 105573

117967

Town (M)

Town (M+OG)

BALSAR/VALSAD 114636

139764

Town (M)

Town (M+OG)

BARODA 1670806

1752371

Town (M)

Town (M+OG)

BARODA (A) 1670806

1752371

Town (M)

Town (M+OG)

BHAVNAGAR 593368

605882

Town (M)

Town (M+OG)

BHUJ/RUDRAMATA(A) 143286

148834

Town (M)

Town (M+OG)

DEESA 111160 Town
DOHAD 94578

118846

Town (M)

Town (M+OG)

DWARKA 38873 Town
IDAR 31176

42306

Town (M)

Town (M+OG)

KESHOD(A) 2359 Village
NALIYA 11415 Village
NEW KANDLA 15782 Urban
OKHA 62052 Town
PORBANDAR 151770

152760

Town (M)

Town (M+OG)

RAJKOT(A) 1286678 Town
SURAT 4467797 City
VALLABH‐VIDYNAGAR 23783 Town
VERAVAL 154636 Town
HARYANA AMBALA 195153 Town
BHIWANI 196057 Town
GURGAON 886519 Town
HISSAR 301383 Town
KARNAL 302140 Town
NARNAUL 74581 Town
ROHTAK 374292 Town
HIMACHAL PRADESH BHUNTAR 4475 Town
DHARAMSHALA 22579

30764

Town (M)

Town (M+OG)

KALPA 1236 Village
MANALI 35248 Town
NAHAN 28899 Town
NAUNI/SOLAN 482 Village
SHIMLA 169578 Town
SUNDARNAGER 24344 Town (M CL)
UNA 58528 Town
JAMMU & KASHMIR BADARWAH 11084 Town (MC)
BANIHAL 3900 Town
BATOTE 4315 Town
GULMARG 1965 Town
JAMMU 502197 Town
KATHUA 51991

59866

Town (M CL)

Town (M CL + OG)

KATRA 9008 Town
KUKERNAG 6553 Rural
KUPWARA 21771 Town
PEHALGAM 9264 Town
QUAZIGUND 9871 Rural
SRINAGAR 1180570 Town (Municipal Corp)
KARNATAKA AGUMBE Rural
BAGALKOTE 111933 Town (MC)
BALEHONNUR Rural
BANGALURU 9621551 Town (Municipal Corp)
BANGALURU (A) urban
BELGAUM 488157 Town (Municipal Corp)
BELGAUM/SAMBRE(A) 13159 urban
BELLARY 410445 Town (Municipal Corp)
BIDAR 214373 Town
BIJAPUR 327427 Town
CHICKMAGALUR 118401 Town
CHITRADURGA 140206 Town
GADAG 172612 Town
GULBARGA 533587 Town
HASSAN 133436 Town
HONAVAR 19109 Town
KARWAR 63755 Town (CMC)
KOLAR GOLD FIELD URBAN (DEFUNCT)
MANDYA 137358 Town (CMC)
MANGALORE (PANAMBUR) URBAN
MANGALORE/BAJPE 9701 Town (CT)
MADIKERI/MERCARA 33381 Town (CMC)
MYSORE 893062

920550

Town (Municipal Corp)

Town (Municipal Corp + OG)

RAICHUR 234073 Town (CMC)
SHIMOGA 322650 Town (CMC)
SHIRALI 13899 Village
TUMKUR 302143 Town (CMC)
KERALA CALICUT/KOZHICODE 431650 Town (Municipal Corp)
CALICUT/KOZHICODE 550440 Town (Municipal Corp + OG)
CANNANORE 2421 Village
COCHIN 265998 Town (Municipal Corp)
KARIPUR AIRPORT Urban
KOTTAYAM 55374 Town
PALGHAT/PALAKKAD 130955 Town
PUNALUR 46702 Town
THIRUVANANTHAPURAM 743691 Town (Municipal Corp)
THIRUVANANTHAPURAM 25736 Town (Municipal Corp + OG)
THRISSUR 315957 Town (Municipal Corp)
LAKSHADWEEP AGATHI AIRPORT Village
AMINI DIVI 7661 Town (Census Town)
MINICOY 10447 Village
MADHYA PRADESH ALIRAJPUR(JHABUA) 28498 Urban
BAGRATAWA Village
BETUL 103330 Town
BHOPAL BAIRAGARH(A) 1036 Village
CHHINDWARA 138291 Town
DAMOH 8100 Town (Hirdespur)
DATIA 100284 Town
DHAR 93917 Town
Chhattisgarh GINABAHAR 2289 Village
GUNA 180935 Town
GWALIOR 20,32,036 City
HOSHANGABAD 12,41,350 City
INDORE 32,76,697 City
JABALPUR 24,63,289 City
JASHPURNAGAR 25422 Town
KANNOD 17744 Town
KHAJURAHO 24481 Town
KHANDWA 200738 City
KHARGONE 106454 City
MALANJKHAND 5533 Town (Garra)
MANDLA 49463 Town
NARSINGHPUR 2147 Village
NIMACH 1163 Village
NOWGAON 40580 City
PANNA 50820 City
Chhattisgarh PENDRA ROAD 1,34,135 Town (Gaurella)
Chhattisgarh RAIGARH 137126 Town
RAISEN 44162 Town
RAJGARH 45,726 City
Chhattisgarh RAJNANDGAON 163114 City
RATLAM 264914 City
REWA 235654 City
SAGAR 273296 City
SATNA 280222 City
SEONI 102343 City
SHAJAPUR 69263 Town
SHEOPUR 68820 City
SHIVPURI 179977 City
SIDHI 54331 Town
THIKRI 8620 Village
TIKAMGARH 79106 Town
UJJAIN 515215 City
UMARIA 33,114 City
VIDISHA 155951 Town
MAHARASHTRA AHMEDNAGAR 202 Village
AKOLA 473,000 City
AKOLA Urban
ALIBAGH 20,743 Town
AMRAVATI 647057 City
AURANGABAD/CHIKALTHANA(A) 1175116 City
BARAMATI 54415 City
BHIRA Rural
BIR 146709 City (Bid Town M-CL)
BRAHMAPURI 36025 Town
BULDHANA 67431 City
CHANDRAPUR 320379 City
DAHANU 50287 Town
DEVGARH 2417 Village
GONDIA 132813 City (Gondiya)
HARNAI 7274 Village
JALGAON 460228 City
JEUR 6,880 Village
KOLAHPUR 549236 City
MAHABALESWAR 13393 Town
MALEGAON 471312 City
MIRAJ(SANGLI) 502793 City
MUMBAI/COLABA Town
MUMBAI/SANTACRUZ Urban
NAGPUR/MAYO_HOSPITAL Urban
NAGPUR/SONEGAON 9387 Town
NANDED 550439 City
OSMANABAD 111825 City
OZAR 51297 Town
PARBHANI 307170 City
PUNE 3124458 City
PUSAD 73046 City
RATNAGIRI 76229 City
SATARA 120195 City
SOLAPUR 951558 City
SIRONCHA 7427 Town (CT)
VENGURLA 12392 Town (CT)
WARDHA 3207 Village
YEOTMAL 116551 Town (M CL)
MANIPUR IMPHAL 277,196 Town (M CL)
MEGHALAYA BARAPANI Village (Umiam Hydel Project)
CHERRAPUNJI 11722 Town (CT)
SHILLONG 155159 Town (MB)
MIZORAM AIJWAL 293416 Town (NT)
LENGPUI 3282 Town (NT)
NEW DELHI PALAM Residential Town/Urban
Town/District - 1,42,004 AYANAGAR Area Town/Urban
SAFDARJUNG Within Town/Urban
C.H.O. New Delhi Town/Urban
ORRISA ANGUL 1106/425 Village (two in Odisha)
BALASORE 242 Village
BARIPADA 3 Villages + 1 Town
BHAWANI PATNA 69045 Town (M)
BHUBANESHWAR(A) 843402 Town (M Corp)
BOLANGIR 1325 Village
CHANDBALI 2650 Village
CUTTACK 610189 Town (M Corp)
GOPALPUR (Boxipalli) 2407 Village
HIRAKUD 30207 Town (NAC)
JHARSUGUDA 97730 Town (M)
KEONJHARGARH 60590 Town (M)
PARADIP 68585 Town (M)
PULBANI 37371 Town (M)
PURI 200564 Town (M)
SAMBALPUR 184000 Town (M)
SUNDERGARH 45036 Town (M)
TITLAGARH 34067 Town (NAC + OG)
PONDICHERRY PONDICHERRY 231513 Municipality
PONDICHERRY(M.O) 69497 Rural Households
PUNJAB AMRITSAR/RAJASANI(A) 14298 Town (NP)
KAPURTHALA 98916 Town (M CL)
LUDHIANA 1618879 Town (M Corp)
LUDHIANA P.A.U. 1618879 Town (M Corp)
PATIALA 406192 Town (M Corp)
PATIALA RS/RW Urban
RAJASTHAN ABU 22943 Town (M)
AJMER 542321 Town (M Corp)
BANSWARA 99969 Town (M)
BHARATPUR Villages (Two villages)
BARMER 96225 Town (M)
BHILWARA 359483 Town (M CL)
BIKANER 644406 Town (M Corp)
CHAMBAL 1485 Village
CHITTORGARH 116406 Town (M)
CHURU 119856 Town (M CL)
DHOLPUR 141 Village
GANGANAGAR Village (4 Villages)
JAIPUR/SANGANER Town (M Corp) / Village
JAISALMER 65471 Town (M)
JAWAI BANDH 184 Village
JHALWAR 66919 Town (M)
KOTA (A) 1001694 Town (M Corp)
KOTA (PB-MICROMET) Urban
PHALODI 49914 Town (M + OG)
PILANI 29741 Town (M)
SAWAI 121106 Town (M)
SIKAR 244497 Town (M CL + OG)
UDAIPUR 451100 Town(M CL)
UDAIPUR (DABOK) 5087 Village
SIKKIM GANGTOK 100286 M Corp
TADONG 1445 Village
TAMILNADU ADIRAMPATTINAM 2448 Village
ARIYALUR 28902 Town (M)
CHENNAI/MINAMBAKKAM 4646732 Town (M Corp)
CHENNAI/NUNGAMBAKKAM 1554 Village
COIMBATORE(PEEAMEDU) 1050721 Town (M Corp)
COONOOR 45494 Town (M)
CUDDALORE 173636 Town (M)
DHARAMPURI 68619 Town (M)
ERODE 157101 Town (M Corp)
K.PARAMATHI 3488 Village
KANNIYAKUMARI 22453 Town (TP)
KODAIKANAL 36501 Town (M)
KARAIKAL 86838 Town (M)
KORADACHERI 6450 Town (TP)
KUDIMIAMALAI 2643 Village
MADURAI 1017865 Town (M Corp)
MADURAI Village (Two villages)
METTUR 52813 Town
NAGAPATTINAM 102905 Town
OCTACAMUND 43317 Town
PALAYANKOTTAI 6932 Village
PAMBAN 37819 Village
PORT NOVO 25541 Town
SALEM 829267 Town (Municipal Corporation)
TANJAVUR 222943 Town
TIRUCHCHIRAPALLI(A) 214529 Town (Municipal Corporation)
TIRUCHI 847387 Town (Municipal Corporation)
TIRUPATHUR 25980 Town (TP)
TIRUTANI Urban
TONDI 18465 Town
TUTICORIN 14159 Village
VEDARANNIYAM 34266 Town (Municipality)
VELLORE 185803 Town (Municipal Corporation)
TELANGANA ADILABAD 117167 Town (Municipality)
TRIPURA AGARTALA 400004 Town (Municipal Council)
KAILASHAHAR Urban
UTTARAKHAND DEHRADUN 569578 Town (Municipal Corporation)
MUKTESHWAR 812 Village
PANTANAGAR 22,258 Town (Census Town)
ROORKEE 118200 Town (Municipal Corporation)
UTTAR PRADESH AGRA 1585704 Town (Municipal Corporation)
ALIGARH 874408 Town (Municipal Corporation)
ALLAHABAD/BAMHRAULI 1112544 Town (Municipal Corporation)
BAHRAICH 186223 Town (Municipal Corporation)
BALLIA 104424 Town (Municipal Corporation)
BANDA Urban
BARABANKI Urban
BAREILLY 903668 Town (Municipal Corporation)
CHURK 6883 Town (Nagar Palika)
ETAWAH 256838 Town (Nagar Palika Parishad)
FAIZABAD 165228 Town (Nagar Palika Parishad)
FATEHGARH 14793 Town (CB)
FATEHPUR 193193 Town (Nagar Palika Parishad)
GAZIPUR Urban
GONDA Urban
GORAKHPUR 673446 Town (Municipal Corporation)
HAMIRPUR 35475 Town (Nagar Palika Parishad)
HARDOI 126851 Town (Nagar Palika Parishad)
JHANSI 505693 Town (Municipal Corporation)
KANPUR 2765348 Town (Municipal Corporation)
KHERI LAKHIMPUR 151993 Town (Nagar Palika Parishad)
LUCKNOW/AMAUSI(A) 2817105 Town (Municipal Corporation)
MAINPURI 120400 Town (Nagar Palika Parishad)
MATHURA 349909 Town (Nagar Palika Parishad)
MEERUT 1305429 Town (Municipal Corporation)
MORADABAD 887871 Town (Municipal Corporation)
MUKHIM Rural
MUZAFFERNAGAR 392768 Town (Nagar Palika Parishad)
NAJIBABAD 88535 Town (Nagar Palika Parishad)
SHAHAJAHANPUR Urban
SULTANPUR 107640 Town (Nagar Palika Parishad)
VARANASI 1198491 Town (Municipal Corporation)
VARANASI/BABATPUR(A) 1803 Village
WEST BENGAL BAGATI 1263 Village
BALURGHAT 151416 Town (Municipality)
BANKURA 137386 Town (Municipality)
BANKURA 137386 Town (Municipality)
BERHAMPUR 195223 Town (Municipality)
CALCUTTA 4496694 Town (Municipal Corporation)
CALCUTTA/DUMDUM 114786 Town (Municipality)
CANNING Unknown Town
CONTAI 92226 Town (Municipality)
COOCH BIHAR(A) District Urban
DARJEELING 4787 Town
DIGHA 8159 Town (CT)
DIMOND HARBOUR 41802 Town (Municipality)
HALDIA 200827 Town (Municipality)
JALPAIGURI 107341 Town (Municipality)
KALIMPONG 49403 Town (Municipality)
KRISHNANAGAR 153062 Town (Municipality)
MALDA 84012 Town (Municipality)
MIDNAPORE Urban
PURULIA Urban
SAGAR ISLAND Rural
SANDHEADS Rural
SHANTI NIKETAN 80210 Town (Municipality)
ULBERIA 222240 Town (Municipality)

References

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  1. ^ "Climatological Tables of Observatories in India 1991-2020" (PDF). IMD Pune. July 2022. Retrieved 1 Sep 2024.
  2. ^ Jaswal, AK; Bhambak, SR; Gujar, MK; Mohite, SH; Anantharaman, S; Bhagyalakshmy, S (2012). "Development of 1961-1990 monthly surface climatology of India and patterns of differences of some meteorological parameters with respect to the 1951-1980 climatology". Mausam Journal. 63 (3): 377–390. doi:10.54302/mausam.v63i3.1222.
  3. ^ "Nagrika - Rise in temperature & Heatwaves in small and mid-sized cities". Nagrika. 2024-05-14. Retrieved 2024-09-01.