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Table 2 Number of lightning strikes by month and bioregion in California, 1985 through 2000.

From: Temporal and Spatial Distribution of Lightning Strikes in California in Relation to Large-Scale Weather Patterns

Month North Coast Klamath Mountains Cascade Range Northeast Plateaus Sierra Nevada Central Valley Central Coast South Coast Southeast Deserts Total
January 436 184 213 18 729 469 169 496 218 2 932
February 446 296 203 47 836 880 432 1 650 3 220 8 010
March 424 788 697 382 2 778 2 708 946 1 682 7 317 17 722
April 389 2 460 2 114 1 812 4 034 1 333 292 1 376 5 152 18 962
May 691 3 896 6 034 6 535 18 683 3 126 964 4 649 29 074 73 652
June 3 121 10 178 13 451 17 119 33 275 7 059 4 166 1 685 33 069 123 123
July 2 633 15 676 15 591 22 618 58 132 3 409 1 099 15 303 109 430 243 891
August 2 774 6 941 11 715 18 284 56 124 4 495 1 055 21 188 186 021 308 597
September 3 554 4 942 7 173 5 785 25 564 7 589 8 356 15 960 80 725 159 648
October 412 595 1 150 548 7 902 2 879 437 3 319 21 257 38 499
November 297 138 190 24 2 005 1 016 202 745 4 774 9 391
December 353 93 29 15 215 225 146 312 416 1 804
Total 15 530 46 187 58 560 73 187 210 277 35 188 18 264 68 365 480 673 1 006 231