Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg., 1990,2320,2551,3171,3293,3405,3832,4072,3966,3551,3226,2959,2152,3211, 1991,2280,2939,3342,3257,3386,3906,4144,4199,3726,3419,2924,2761,3359, 1992,2695,3108,3471,3539,3683,4235,4445,4489,3995,3651,3088,2358,3574, 1993,2144,2776,3416,3639,3788,4109,4661,4452,4134,3799,3288,2801,3588, 1994,2847,3025,3631,3926,4028,4256,4828,4611,4095,3893,3017,2781,3750, 1995,2967,3063,,3287,3976,4093,,4322,3971,3555,3357,2908,, 1996,2456,2980,3445,3772,3842,4123,4510,4476,4002,3763,3508,2850,3644, 1997,2711,3365,3845,3856,3903,4347,4628,4622,4066,3923,3675,3216,3846, 1998,3082,3387,3788,3962,4034,4373,4668,4574,4187,4004,3692,3052,3900, 1999,3011,3156,4021,3838,4003,4423,4656,4576,4271,4055,3836,3031,3906, 2000,2983,3341,3861,3941,3987,4175,4424,4400,4061,3961,3380,3122,3803, 2001,2774,3270,,,,4805,4458,4301,4125,3949,3658,2820,, 2002,2979,3554,4044,3827,3945,4384,4507,4376,4086,3861,3651,3248,3872, 2003,3249,3401,3775,3647,3872,4197,4357,4482,3982,3951,3692,3012,3801, 2004,2834,3122,3928,3849,3840,4186,4486,4214,4029,3860,3421,3084,3738, 2005,2738,3305,3800,3745,3705,4145,4474,4092,3637,3823,3480,2929,3656, 2006,2872,3312,3662,3774,3626,4110,4305,4140,3896,3884,3480,3134,3683, 2007,3034,3341,3885,3768,3750,4292,4327,4232,3979,3819,3613,2919,3747, 2008,2660,3045,3731,3570,3551,3827,3902,3933,3523,3448,3397,2572,3430, 2009,2784,3030,3485,3502,3562,3874,4097,3987,3667,3511,3280,2681,3455, 2010,2832,3143,3563,3555,3615,4009,4202,3943,3668,3626,3033,2732,3493, 2011,2755,2972,3513,3496,3472,3906,4195,3931,3668,3607,3304,2987,3484, 2012,2724,3103,3658,3587,3461,,,,,,,,, 2013,,,,,,4154,4461,4315,3753,3766,3417,3157,, 2014,3024,3048,3910,3793,3844,4254,4416,4201,3867,3814,3377,3160,3726, 2015,3071,3457,4079,3859,3981,4392,4730,4380,4096,4056,3596,3071,3897, 2016,3034,3506,4131,4052,4147,4667,4872,4515,4246,4121,3939,3069,4025, 2017,2622,2920,4226,4170,4233,4745,4906,4973,4234,4194,3848,3339,4034, 2018,3275,3377,4051,4188,4211,4631,4846,4564,4306,4242,3952,3278,4094, 2019,3279,2945,3994,4152,4272,4818,4976,4587,4319,4292,3877,3427,4078, 2020,3185,3492,3337,2143,2972,4392,4759,4597,4728,4395,3687,3343,3752, 2021,3375,3268,4246,4488,4671,5141,5325,4801,4562,4514,4552,3691,4386, 2022,3365,3863,4528,4575,4705,5058,5152,4921,4732,4786,4168,3341,4433, 2023,3409,3612,4043,4352,4577,5192,5293,4917,4741,4798,4339,3780,4421, 2024,3163,3686, , , , , , , , , , , ,