Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg., 1990,2496,2624,3066,3634,4690,5240,6207,5783,5000,4251,3321,2507,4077, 1991,2297,3348,3162,3577,4610,5471,6619,6421,5380,5050,3547,3267,4403, 1992,3031,3646,4010,4387,5993,6101,7002,6944,5513,5533,3952,3067,4951, 1993,2982,3517,3519,4273,5980,6223,7859,7414,6467,6011,4503,3948,5237, 1994,3829,3578,4123,4864,5671,6777,8655,7554,6794,6386,4194,3872,5539, 1995,3778,4423,4261,4877,6195,7123,8691,7872,6407,6226,4742,3822,5701, 1996,3439,4303,4426,4875,6039,7145,8813,8317,6742,6142,4629,3578,5704, 1997,2639,4375,4173,,,,,,,,,,, 1998,3847,4387,4449,5069,6114,7371,9192,8741,7393,6471,5280,4323,6053, 1999,4188,4124,4600,5175,6470,7609,9439,8705,7427,6684,5397,4444,6189, 2000,4049,4745,4867,5558,6421,8093,9626,8770,7312,6569,5035,4520,6297, 2001,4287,4620,4986,5518,7413,8320,9668,9184,7346,6919,5660,4506,6536, 2002,4437,4901,4877,5531,7317,8579,10027,9734,7816,7129,5780,5079,6767, 2003,4794,5263,5225,5685,7526,8941,10327,9864,7962,7529,5766,5141,7002, 2004,4407,5113,5574,6359,7718,9105,10729,9403,8523,7671,6122,5558,7190, 2005,5252,5870,6004,6407,7884,9076,11052,10093,8337,7600,6238,5464,7440, 2006,5178,5720,5728,6227,7604,9225,11022,10048,8648,8045,6555,5802,7484, 2007,5666,5950,6297,6790,8403,9671,10910,10052,8179,7847,6636,5743,7679, 2008,4998,5403,5519,5934,7079,8105,,9580,7588,6826,5709,4821,, 2009,4893,5469,5101,5717,7453,8412,10434,9389,7850,6598,5484,4826,6802, 2010,4854,5147,5194,5564,6666,8209,10447,9430,7507,6754,4980,4623,6615, 2011,4715,4936,4857,5091,6409,7981,9933,9138,7670,6701,5284,5200,6493, 2012,5005,5379,5158,5767,6975,8633,10421,8907,7839,6886,5599,5359,6827, 2013,4814,5521,5838,6161,7771,9303,11024,10181,7871,7472,6007,5413,7281, 2014,5831,5621,6101,6617,8223,9799,10898,9714,8103,7708,5989,5922,7544, 2015,6090,6797,7069,7454,9137,10914,12116,11105,9683,8956,7045,6574,8578, 2016,6846,7170,,8043,9842,11775,13040,11747,10463,9259,8099,6270,, 2017,6778,7125,7526,8228,10240,12133,13960,13097,10814,9850,8193,7637,9632, 2018,8002,7599,7835,8122,11320,13786,14482,13581,11775,10541,9092,8298,10369, 2019,8974,7971,9121,9799,11547,14648,15823,15172,12967,11697,10426,9613,11480, 2020,9608,10182,9167,8915,13087,15393,17500,17188,14783,13430,10836,10839,12577, 2021,10912,10765,11121,12246,14294,17773,18296,17002,15294,13905,11143,10692,13620, 2022,10838,12157,12272,12581,14376,17254,18425,17979,16117,15220,11991,11166,14285, 2023,11938,12396,11775,13336,16064,18175,19635,18519,17083,15903,13588,12249,15055, 2024,10947,13112, , , , , , , , , , , ,