Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg., 1991,,,,,,,,,,,,22595,, 1992,19953,21453,22383,23595,24224,26642,27779,28300,24621,23327,22443,23328,24080, 1993,20296,22531,23891,25584,25691,27517,29702,29664,26487,25031,23778,25352,25480, 1994,22503,23262,24953,26673,27964,30205,32444,34743,31095,28585,24725,25932,27789, 1995,22771,23655,25479,26722,28052,28635,29229,30110,28799,27153,,25440,, 1996,21508,24279,25735,25980,27263,28733,29347,29969,27159,26155,23761,25315,26267, 1997,23560,24852,25230,26982,28179,28889,29679,30346,27075,26405,25808,26766,26981, 1998,23658,25815,26908,27682,29711,30636,,,,,,,, 1999,25299,26173,27549,28527,29782,31216,31900,32711,29705,28926,27581,28365,28978, 2000,25206,27034,27895,28833,29814,30633,31367,32319,30563,33917,30545,28303,29702, 2001,25908,27564,30890,33357,33094,31595,33789,34873,31677,30445,28313,28271,30815, 2002,25949,27411,27620,29917,31619,31493,33551,34379,29733,29160,28152,28592,29798, 2003,26346,27980,27891,29467,31038,33163,34863,36299,31770,31158,28624,31104,30809, 2004,27575,30014,31440,35419,36101,35191,35809,35645,32683,31455,30663,31885,32823, 2005,28027,30168,33297,36265,37503,38442,38453,38045,33944,33015,31690,32669,34293, 2006,29987,31919,33223,33636,34371,36420,36926,38012,32145,30563,28967,29734,32992, 2007,27134,29105,30615,30827,33073,33858,34008,34777,30427,29717,28451,28169,30847, 2008,25845,29018,28988,29390,30580,31108,32887,33399,29522,28706,27140,26276,29405, 2009,27571,28592,27907,29102,,,36060,34561,26695,27160,27712,29107,, 2010,26390,28804,29757,30478,30251,32734,35564,35980,31847,30468,28074,29311,30805, 2011,27555,29138,30248,30931,32346,33947,35758,36410,32291,31673,29318,30386,31667, 2012,27618,29967,30537,32425,33450,34042,36775,37542,33006,32314,29943,30438,32338, 2013,27860,30636,31494,31849,33787,34295,36598,37088,32881,32265,30315,30027,32425, 2014,28025,29621,31754,32705,34102,34845,36899,38302,33894,33517,31401,31623,33057, 2015,29465,32430,32795,33469,34786,36329,38081,38081,34493,34097,32176,32148,34029, 2016,30901,33468,33626,34956,35775,37011,38180,38449,35182,33857,32323,31869,34633, 2017,31587,32602,34230,35198,36348,37340,38954,38787,34779,34879,32601,31840,34929, 2018,30887,32501,34496,34821,36498,37355,39307,37895,34721,35113,32806,32526,34910, 2019,31530,30971,34847,34878,35492,36640,37862,37816,34776,34899,33017,32390,34593, 2020,30254,33134,28285,23527,30939,35753,35759,36293,34488,33378,30907,31572,32024, 2021,32338,32685,35793,35896,37012,38237,39426,38515,35740,35498,32871,33619,35636, 2022,31849,34131,34360,34411,35424,36782,39693,43135,40139,40116,36212,35718,36831, 2023,36986,38362,39186,40396,41627, , , , , , , , , 2024, , , , , , , , , , , , , ,