▁semi - ar id . ▁ ▁Se asons ▁ ▁The ▁summer ▁in ▁T amil ▁N adu ▁runs ▁throughout ▁March , ▁April ▁and ▁May ▁and ▁is ▁character ized ▁by ▁inten se ▁heat ▁and ▁sc ant ▁ra inf all ▁across ▁the ▁state . ▁ ▁Winter ▁The ▁cold ▁weather ▁comm ences ▁early ▁in ▁December ▁and ▁comes ▁to ▁an ▁end ▁in ▁the ▁middle ▁of ▁March . ▁The ▁climate ▁in ▁the ▁cold ▁weather ▁is ▁pleasant . ▁The ▁days ▁are ▁bright ▁and ▁sun ny ▁the ▁sun ▁is ▁not ▁too ▁hot . ▁ ▁As ▁soon ▁as ▁the ▁sun ▁sets ▁the ▁temperature ▁falls ▁and ▁the ▁heat ▁of ▁the ▁day ▁yields ▁place ▁to ▁cool er ▁weather . ▁ ▁Mon so on ▁The ▁state ▁has ▁three ▁distinct ▁periods ▁of ▁ra inf all : ▁advanced ▁ra inf all ; ▁ra inf all ▁from ▁the ▁tropical ▁cycl ones ▁emer ging ▁in ▁the ▁neighbourhood ▁of ▁the ▁And aman ▁islands ▁during ▁the ▁Ret re at ▁of ▁Mon so ons ( Oct ober – Nov ember ); ▁and ▁the ▁North ▁East ▁mon so on ▁during ▁the ▁months ▁of ▁October – Dec ember , ▁with ▁dominant ▁n ortheast ▁mon so on ▁wind s ▁from ▁the ▁western ▁dist urban ces ▁emer ging ▁over ▁the ▁Bay ▁of ▁Beng al . ▁The ▁dry ▁season ▁is ▁from ▁February ▁to ▁early ▁in ▁June . in ▁South west ▁Mon so on ▁V ell ore ▁Play ing ▁important ▁role ▁in ▁T amil n adu ▁, ▁J aw ad hu ▁and ▁Y el ag iri ▁R anges ▁producing ▁High ▁int ensive ▁Rain ▁clouds ▁to ▁Br ing ▁R