Rapid City, SD (1942-1984) Fastest Mile (mph) 3-s peak gusts (mph) 3-s peak gusts (m/s) NW 66 80 36 SW 65 79 35 SW 63 76 34 NW 60 73 33 NW 60 73 33 NW 68 82 37 SW 65 79 35 NW 66 80 36 NW 65 79 35 NW 65 79 35 NW 61 74 33 W 65 79 35 NW 53 66 30 W 60 73 33 NW 49 61 27 N 54 66 30 NW 50 62 28 SW 66 80 36 NW 56 69 31 NW 59 72 32 SW 54 66 30 W 52 64 29 NW 61 74 33 NW 57 70 31 NW 64 77 34 SW 70 84 38 NW 61 74 33 NW 61 74 33 NW 64 77 34 NW 64 77 34 NW 61 74 33 NW 61 74 33 NW 53 66 30 NW 62 76 34 NW 62 76 34 NW 68 82 37 NW 66 80 36 SW 62 76 34 NW 60 73 33 NW 59 72 32 NW 62 76 34 NW 62 76 34 NW 66 80 36