Weather and Climatology of Telangana
in Nalgonda districts followed by 14 in Mancherial, Nirmal, Yadadri Bhuvanagiri, Suryapet. The lowest of 4 dry spells in Wanaparthy, 5 in Peddapalli, Jagtial districts in last 17 years. v
Year wise average number of wet spells during the southwest monsoon season from 2004 to 2020 shows there is a slight increasing trend in wet spells during 2004 to 2020 with highest of 28 wet spells in Mulugu, followed by 22 in Bhadradri Kothagudem and 21 in Adilabad district. Lowest of 5 wet spells were recorded in Suryapet, Jogulamba Gadwal and Narayanpet followed by 6 in Yadadri Bhuvanagiri, Rangareddy, Nagarkurnool and Nalgonda in last 17 years.
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Year wise from 2004 to 2020, number of stations recording Heavy, Very Heavy rainfall per day during the Southwest monsoon season shown an increasing trend in number of heavy, very heavy rainfall days. Higher number of heavy rainfall events occurred more over northern districts (Adilabad, Kumuram Bheem, Nirmal, Kamareddy, Jagtial and Mancherial) of the state as compared to districts from the southern part (Mahabubnagar, Wanaparthy, Narayanpet, Jogulamba Gadwal, Nagarkurnool). Also heavy rainfall events are observed over eastern districts (Mulugu, Jayashankar, Bhadradri Kothagudem, Khammam and Warangal Rural) of the state during the season in last 17 years.
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The mean Annual temperature of the state is recorded 34.1°C. A peak occurs during summer season (39.0°C), lowest is recorded during Northeast monsoon season (32.9°C) and 33.0°C during Southwest Monsoon season.
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On a monthly basis, highest mean maximum temperature (40.9°C) is observed during the month of May and lowest (30.5°C) during December. April and May months are the warmest months of the state. On a district wise Peddapalli and Mancherial districts are the warmest district (42.3°C) followed by Jagtial district (42.2°C). On an annual basis, Rangareddy (33.0°C) and Sangareddy and Vikarabad (33.2°C) districts are somewhat cooler.
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The state as a whole experiences a mean minimum temperature of 21.8°C on an annual basis. However, there are differences in districts. The annual mean higher temperatures of 25.8°C Khammam, 25.6°C Suryapet, 25.5°C Wanaparthy, Hyderabad, Bhadradri Kothagudem and cooler temperature is of 23.4°C Adilabad, 23.7°C Siddipet, Sangareddy, 23.8°C Rangareddy.
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The day-to-day Summer maximum temperatures reaches up to 48°C over Adilabad, Peddapalli , Mancherial, Nalgonda and Khammam districts during the month of May and in winter minimum temperatures reaches lowest to 5°C over Adilabad, Kumuram Bheem, Peddapalli , Mancherial districts in December.
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The diurnal variation of temperature during the afternoon/morning shows a sudden fall /rise of 5° to 8°C in 2-3 hour after sun set/rise. This sudden fall /rise of temperature is due to semi-arid nature of soil.
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Relative humidity on annual basis state experiences average of 62% with highest of 89% over Khammam, 88% Bhadradri Kothagudem, 86% Jayashankar districts and low of 39% over Narayanpet, 40% Adilabad, Sangareddy and Rajanna Sircilla districts.
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