長沙屬亞熱(re)帶(dai)季(ji)(ji)風氣(qi)(qi)(qi)(qi)候(hou)，氣(qi)(qi)(qi)(qi)候(hou)特征是：氣(qi)(qi)(qi)(qi)候(hou)溫(wen)(wen)和(he)，降水(shui)充沛，雨(yu)熱(re)同期，四季(ji)(ji)分明。夏(xia)冬(dong)季(ji)(ji)長，春秋季(ji)(ji)短(duan)，夏(xia)季(ji)(ji)約118-127天(tian)(tian)，冬(dong)季(ji)(ji)117-122天(tian)(tian)，春季(ji)(ji)61-64天(tian)(tian)，秋季(ji)(ji)59-69天(tian)(tian)。春溫(wen)(wen)變化大，夏(xia)初雨(yu)水(shui)多，伏秋高溫(wen)(wen)久，冬(dong)季(ji)(ji)嚴寒少。3月(yue)(yue)(yue)下(xia)旬(xun)(xun)至5月(yue)(yue)(yue)中旬(xun)(xun)，冷(leng)暖空氣(qi)(qi)(qi)(qi)相互交綏，形成(cheng)連綿陰雨(yu)低(di)溫(wen)(wen)寡照(zhao)天(tian)(tian)氣(qi)(qi)(qi)(qi)。從5月(yue)(yue)(yue)下(xia)旬(xun)(xun)起，氣(qi)(qi)(qi)(qi)溫(wen)(wen)顯著提高，夏(xia)季(ji)(ji)日平(ping)均氣(qi)(qi)(qi)(qi)溫(wen)(wen)在30℃以上有85天(tian)(tian)，氣(qi)(qi)(qi)(qi)溫(wen)(wen)高于(yu)35℃的炎熱(re)日每年(nian)(nian)(nian)約30天(tian)(tian)，盛夏(xia)酷熱(re)少雨(yu)。9月(yue)(yue)(yue)下(xia)旬(xun)(xun)后，白天(tian)(tian)較暖，入夜轉涼(liang)，降水(shui)量(liang)(liang)減少，低(di)云量(liang)(liang)日多。從11月(yue)(yue)(yue)下(xia)旬(xun)(xun)至第二年(nian)(nian)(nian)3月(yue)(yue)(yue)中旬(xun)(xun)，節屆(jie)冬(dong)令(ling)，長沙氣(qi)(qi)(qi)(qi)候(hou)平(ping)均氣(qi)(qi)(qi)(qi)溫(wen)(wen)低(di)于(yu)0℃的嚴寒期很短(duan)暫，全(quan)年(nian)(nian)(nian)以1月(yue)(yue)(yue)最冷(leng)，月(yue)(yue)(yue)平(ping)均為4.4℃-5.1℃。長沙市(shi)(shi)區年(nian)(nian)(nian)平(ping)均氣(qi)(qi)(qi)(qi)溫(wen)(wen)17.2℃，各縣16.8℃-17.3℃，年(nian)(nian)(nian)積溫(wen)(wen)為5457℃，市(shi)(shi)區年(nian)(nian)(nian)均降水(shui)量(liang)(liang)1361.6毫(hao)米，各縣年(nian)(nian)(nian)均降水(shui)量(liang)(liang)1358.6-1552.5毫(hao)米。