Siena Dati SIR - Servizio Idrologico Regionale Lat 43,32° N · Lon 11,31° E · Quota 350 m s.l.m. · Clima 1991-2020 Climatologia 1971-2000 Climatologia 1981-2010 Valori climatici medi Valori medi mensili e annui 1991-2020 Siena 1991-2020GenFebMarAprMagGiuLugAgoSetOttNovDicAnno Temperatura minima (°C) 1ª decade3,53,04,56,910,414,117,318,715,312,48,84,8 2ª decade3,12,75,47,511,615,117,517,914,611,07,23,6 3ª decade2,63,45,99,212,716,318,417,513,210,05,63,5 Media3,13,05,37,911,615,217,718,014,411,17,23,99,9 Dev. std.1,52,11,31,61,61,41,31,41,31,31,41,41,5 Temperatura massima (°C) 1ª decade9,910,512,917,221,225,629,831,626,721,516,111,2 2ª decade9,711,015,317,422,326,830,330,625,119,914,110,1 3ª decade9,611,715,419,724,328,831,329,923,318,312,29,7 Media9,811,014,618,122,727,130,530,725,019,814,210,319,5 Dev. std.1,32,21,91,62,02,01,62,11,81,61,31,41,7 Temperatura media (°C) 1ª decade6,76,78,712,115,819,923,525,221,017,012,58,0 2ª decade6,46,910,412,417,021,023,924,319,815,410,76,8 3ª decade6,17,510,614,418,522,524,823,718,314,28,96,6 Media6,47,09,913,017,121,124,124,419,715,510,77,114,7 Dev. std.1,32,11,41,61,81,61,41,61,41,31,31,31,5 Precipitazioni Pioggia (mm)53615971705229398110612577823 Giorni di pioggia7,06,67,58,18,25,93,43,96,78,110,08,884,4 Estremi Estremi termiciParametroValoreAnno / data Tmin assoluta-11,1 °C07/02/1991 Tmax assoluta39,6 °C01/08/2017 Giorni di ghiaccio (totali)26– Giorni di ghiaccio (max annuo)41991 - 1996 Giorni di gelo (media annua)17– Giorni di gelo (max annuo)441991 Giorni con T>34 °C (media annua)10– Giorni con T>34 °C (max annuo)352003 Indice di continentalità17,9– Estremi pluviometrici (mm)PeriodoMediaMassimaAnnoMinimaAnno Anno823115520103812006 Primavera2003512018882017 Estate1202331997371993 Autunno3125652005562006 Inverno1913472010301992 Ondate di calore e di freddo Numero di ondate di calore e di freddo per stagione AnnoOndate di caloreOndate di freddo MAMGLASONDGFAnnoGiorni T>34 °CMAMGLASONDGFAnnoGiorni di gelo 19910000031013444 199200000130201220 199300000152010330 199400000131100211 19950100160002221 19960000011100225 1997001010000001 199810001151010219 19990110260000027 200001001110100111 200100101130110321 20020000040111211 200312003350002235 20040000061000118 20050200281111433 20060110271100217 2007210148100010 2008000001000002 20092000230010212 20100000022311625 20111010290100113 201201001200001231 20130000020201214 2014001130010015 20150011116010018 2016101022000006 201712003200001117 201810102110000012 20190100225100019 20201112420001013 Totale111410540–131791451– MAM = marzo-maggio · GLA = giugno-agosto · SON = settembre-novembre · DGF = dicembre-febbraio Dettaglio annuale 1991-2020 Nelle tabelle annuali, per ogni mese: valore più alto valore più basso del trentennio. Temperatura media mensile (°C) Temperatura media mensile (°C) AnnoGenFebMarAprMagGiuLugAgoSetOttNovDic 19914,93,811,39,612,118,724,024,520,613,07,73,9 19925,76,89,011,718,018,222,824,719,713,810,96,2 19935,95,77,612,017,721,222,725,519,014,98,47,6 19947,06,712,211,016,720,125,626,519,914,712,27,4 19954,98,47,711,715,818,725,122,617,516,69,47,1 19967,34,67,713,016,620,922,923,217,014,110,76,1 19977,58,411,110,117,720,723,124,021,515,810,47,5 19986,68,99,312,317,322,124,925,519,315,18,35,4 19996,44,69,812,818,921,524,324,921,215,49,16,7 20005,08,510,013,619,122,522,425,420,116,311,88,7 20016,97,112,011,018,220,323,325,417,017,69,44,5 20025,79,511,512,016,123,323,822,017,914,611,97,2 20035,12,99,412,419,925,125,927,719,814,311,36,8 20044,96,98,512,415,621,524,023,920,216,910,58,0 20054,94,29,512,719,422,824,822,119,415,39,64,8 20064,76,58,213,817,521,526,422,220,917,211,28,9 20078,68,59,315,918,621,124,922,918,314,110,18,6 20088,58,810,313,517,821,023,424,218,917,011,47,2 20097,37,610,915,119,519,923,125,020,914,811,57,5 20105,76,28,212,514,918,923,921,518,013,39,75,7 20116,57,39,514,717,920,421,223,621,915,211,38,1 20126,63,812,612,415,921,724,125,819,315,511,45,9 20136,15,29,113,814,719,222,923,219,616,310,97,3 20147,99,510,813,415,820,921,321,920,116,913,68,5 20157,66,19,513,016,921,025,623,318,915,112,28,6 20167,910,110,115,116,820,424,824,221,015,510,98,2 20174,49,412,513,918,323,325,126,918,416,39,96,6 20189,04,58,516,218,122,025,525,822,117,311,27,6 20195,09,511,213,114,224,325,926,321,317,311,59,1 20208,010,29,914,418,520,725,226,121,514,311,97,6 Media6,47,09,913,017,121,124,124,419,715,510,77,1 Dev. std.1,32,11,41,61,81,61,41,61,41,31,31,3 Media + dev. std.7,79,111,414,518,922,825,526,021,116,812,08,4 Media − dev. std.5,14,98,511,415,419,522,822,718,314,29,45,8 Temperatura minima media mensile (°C) Temperatura minima media mensile (°C) AnnoGenFebMarAprMagGiuLugAgoSetOttNovDic 19911,10,36,74,76,512,216,917,614,88,74,2-0,2 19921,82,13,76,311,713,016,618,113,910,17,63,5 19932,91,02,76,911,915,216,319,014,011,15,74,6 19943,92,96,66,611,514,619,620,215,210,68,94,6 19951,94,63,26,410,713,219,316,912,711,65,33,7 19964,60,83,28,011,415,217,217,312,59,87,33,2 19974,24,76,25,311,915,516,818,215,411,47,34,3 19983,44,24,17,411,816,018,119,014,110,64,72,2 19992,70,15,17,913,215,118,318,816,212,15,33,4 20001,23,95,28,713,216,115,718,314,211,98,15,2 20013,92,97,85,612,514,017,118,511,212,65,61,1 20021,45,46,46,010,317,217,816,713,410,89,15,1 20032,1-1,44,87,013,317,718,821,013,89,57,84,0 20041,63,84,37,210,015,117,017,914,912,46,55,4 20052,00,54,87,613,717,218,817,115,211,76,62,1 20061,63,04,69,012,216,120,617,215,713,17,65,8 20075,85,76,111,313,616,018,817,513,710,76,64,8 20085,24,36,19,012,815,817,017,313,612,57,94,1 20093,93,56,410,413,314,616,618,315,510,08,04,2 20102,52,74,07,210,013,217,215,212,28,86,62,5 20113,22,84,78,511,014,115,216,315,08,96,44,5 20122,0-0,66,37,910,015,016,617,814,010,97,82,5 20132,81,05,28,59,713,016,416,513,812,57,13,6 20144,76,05,78,510,414,616,316,315,612,110,75,4 20153,92,14,27,310,814,818,416,813,911,18,55,1 20164,56,25,710,011,715,018,618,215,711,27,44,4 20170,75,57,38,412,716,318,720,013,210,86,23,2 20186,11,25,111,213,416,419,219,616,413,08,44,5 20191,54,86,38,59,818,019,620,015,912,88,85,9 20204,75,85,58,913,515,218,719,716,110,08,64,9 Media3,13,05,37,911,615,217,718,014,411,17,23,9 Minimo0,7-1,42,74,76,512,215,215,211,28,74,2-0,2 Dev. std.1,52,11,31,61,61,41,31,41,31,31,41,4 Media + dev. std.4,55,16,59,513,216,619,119,415,712,48,65,3 Media − dev. std.1,60,94,06,310,013,716,416,713,19,95,82,5 Temperatura massima media mensile (°C) Temperatura massima media mensile (°C) AnnoGenFebMarAprMagGiuLugAgoSetOttNovDic 19918,77,315,914,517,725,131,131,426,417,311,38,0 19929,611,414,417,124,423,428,931,425,617,514,29,0 19938,910,412,617,023,527,229,032,024,118,711,210,6 199410,110,617,715,422,025,631,632,924,718,915,610,2 19957,912,212,217,020,824,330,928,222,321,513,510,5 19969,98,512,118,021,826,628,729,021,418,314,29,0 199710,712,015,914,923,525,929,429,827,620,313,610,7 19989,813,714,517,222,928,231,731,924,419,511,98,6 199910,19,214,517,724,727,930,231,026,218,812,89,9 20008,713,014,918,525,129,029,232,526,120,715,512,2 20019,811,416,216,523,826,629,632,222,722,613,37,8 200210,013,516,618,021,929,429,727,422,318,514,89,3 20038,17,214,117,826,432,433,034,425,819,014,89,5 20048,110,112,817,521,227,831,029,925,521,514,410,5 20057,87,814,217,825,128,530,727,223,618,912,77,6 20067,89,911,818,722,826,932,227,226,121,314,911,9 200711,511,312,520,523,626,331,028,223,017,513,512,4 200811,713,414,518,122,926,129,931,124,221,614,910,3 200910,811,715,419,825,725,229,631,826,319,515,110,7 20108,89,712,417,719,724,730,727,923,817,712,98,9 20119,911,914,220,924,726,727,331,028,821,516,211,6 201211,28,218,817,021,728,431,633,924,720,115,09,3 20139,49,412,919,219,725,429,429,925,320,114,610,9 201411,113,115,918,321,227,326,327,424,621,716,511,7 201511,410,114,818,623,027,232,929,824,019,115,912,1 201611,314,014,620,222,025,731,030,226,419,714,412,1 20178,213,217,819,523,930,331,533,823,521,813,79,9 201812,07,911,921,222,827,631,831,927,921,514,110,7 20198,514,116,217,718,730,732,232,626,721,814,212,2 202011,414,614,219,823,526,231,832,627,018,615,210,4 Media9,811,014,618,122,727,130,530,725,019,814,210,3 Massimo12,014,618,821,226,432,433,034,428,822,616,512,4 Dev. std.1,32,21,91,62,02,01,62,11,81,61,31,4 Media + dev. std.11,113,216,419,724,729,132,032,826,821,415,511,7 Media − dev. std.8,58,812,716,420,625,128,928,623,218,312,88,9 Pioggia mensile (mm) Pioggia cumulata mensile (mm) AnnoGenFebMarAprMagGiuLugAgoSetOttNovDic 199113,658,064,246,2164,642,045,86,284,0158,0205,64,8 199220,04,887,873,447,677,452,458,874,0303,6131,851,0 19932,61,011,259,033,820,22,614,678,0162,061,446,8 199425,018,60,4102,2147,961,424,00,0120,869,858,215,8 199524,066,240,043,235,448,840,837,681,610,211,4163,0 199682,472,826,2158,876,231,248,657,0148,061,0147,8139,6 199787,656,623,492,041,4119,050,663,422,038,6220,464,8 199852,848,469,2116,456,833,62,212,6127,6106,856,692,2 199950,444,492,267,662,277,817,612,094,0150,4143,480,0 200033,017,675,276,838,694,223,625,836,2142,6296,2101,2 2001131,045,4119,674,879,630,47,04,4248,883,459,221,6 200218,883,214,479,687,016,632,6138,277,2103,4142,8105,4 200360,817,828,8102,85,6108,427,418,049,4103,9195,555,5 200456,588,043,280,370,613,748,172,040,2170,957,2216,9 200527,61,872,576,140,541,122,974,2181,5150,5233,2127,0 200640,135,067,826,467,725,132,516,522,724,39,313,8 200726,957,261,42,392,547,91,663,753,344,623,419,0 200886,254,188,749,853,694,216,123,683,684,7162,5146,5 200952,496,396,965,152,8104,621,328,885,199,472,397,7 2010133,2116,053,491,7164,350,86,435,883,676,6214,2128,9 201144,155,087,330,316,563,183,55,87,048,229,868,6 201221,726,07,7115,889,32,80,099,2134,2166,7156,959,8 201389,493,890,752,5109,841,049,94,162,5182,4110,141,5 2014126,8159,146,566,630,651,593,629,759,627,0185,857,6 201537,168,479,360,433,458,119,499,915,1160,626,54,2 201685,2191,453,6100,1112,055,020,455,259,8140,2196,210,0 201722,679,829,840,217,822,49,46,6149,89,496,278,0 201830,4129,8163,062,0125,636,622,465,433,085,4108,661,8 201949,043,625,692,4109,62,839,214,240,093,8306,269,4 202051,25,639,837,639,679,02,831,282,2133,418,6157,4 Media52,761,258,771,470,151,728,839,281,2106,4124,676,7 Cumulata max133,2191,4163,0158,8164,6119,093,6138,2248,8303,6306,2216,9 Dev. std.35,345,636,431,742,931,223,234,153,163,784,653,5 Media + dev. std.88,1106,895,0103,1112,982,952,073,3134,2170,1209,2130,2 Media − dev. std.17,415,622,339,727,220,45,65,028,142,739,923,1 Giorni di pioggia Giorni di pioggia mensili AnnoGenFebMarAprMagGiuLugAgoSetOttNovDic 1991458814542913131 1992416106139342085 199310367314911108 19947501166308564 199558671073672412 199697599856135118 19979336444616189 19987551310513119910 19994610146632981311 20005491185445111810 20011241091133110395 200237314114510991212 200382562633611108 200410108128536511514 2005618856368101116 20065613563657534 20074681107177534 20081341410101021751114 20091081285914671016 2010121610812623891913 20116711436623339 20124521382016101010 201311101471544129133 20141416786811345158 20155876572631141 201610179712945610102 20174944342292811 2018713167167311481112 201973391313277198 202052736913812416 Media7,06,67,58,18,25,93,43,96,78,110,08,8 Massimo141716141613111113201916 Dev. std.3,34,43,93,23,72,62,32,62,73,84,84,5 Media + dev. std.10,311,011,511,411,98,55,76,59,411,914,813,3 Media − dev. std.3,72,23,64,94,63,41,11,34,04,25,24,3 Legenda