2008 Mixing Height Data Monthly Avg Std Dev By Local Time of Day By Local Time of Day and Season Jan 393.8 355.6 Hour Annual Avg Std Dev Winter Avg Spring Avg Summer Avg Fall Avg Feb 407.0 385.6 1 231 223 269 255 171 232 Mar 477.3 495.1 2 245 235 298 271 173 238 Apr 715.5 740.3 3 247 233 288 288 179 234 May 668.9 672.5 4 233 185 256 268 186 223 Jun 889.8 1068.6 5 225 182 258 230 182 230 Jul 749.6 930.1 6 227 210 260 242 173 235 Aug 762.6 880.0 7 230 201 253 254 188 227 Sep 652.3 742.5 8 237 201 252 258 205 232 Oct 543.1 564.5 9 280 224 294 317 257 252 Nov 464.3 517.0 10 448 405 341 535 526 388 Dec 332.1 287.3 11 721 537 458 694 1066 664 12 989 688 515 904 1586 945 Annual Max 5577.5 13 1134 701 599 1004 1789 1139 Min 50.0 14 1271 789 664 1183 1977 1283 Avg 588.1 15 1319 798 701 1299 1960 1311 St Dev 699.6 16 1404 864 709 1399 2094 1405 17 1395 899 611 1320 2055 1387 18 1213 996 366 1354 1981 1143 19 807 883 317 1092 1345 464 20 343 499 260 498 424 185 21 241 309 281 265 220 200 22 225 168 260 257 169 217 23 226 180 250 247 175 234 24 223 176 230 268 172 222