To view monthy precipitation averages for the stations below, click here.
| Station | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
| Bennett County SD | |||||||||||||
| Martin | 0.39 | 1.44 | 1.88 | 2.88 | 0.61 | 3.99 | 3.81 | 4.01 | 0.17 | 2.87 | 0.08 | 1.19 | 23.32 |
| Butte County SD | |||||||||||||
| Belle Fourche | 0.33 | 0.75 | 1.74 | 2.87 | 0.73 | 2.13 | 1.45 | 3.48 | 1.04 | 2.06 | 0.00 | 1.37 | 17.95 |
| Belle Fourche 22WNW | 0.05 | 0.78 | 2.61 | 2.27 | 0.76 | 2.96 | M | 1.40 | 0.64 | 1.69 | M | M | 13.16 |
| Hoover | 0.29 | 1.74 | 2.90 | 2.17 | 1.17 | 2.45 | 2.15 | 1.41 | 0.30 | 2.73 | T | 1.10 | 18.41 |
| Newell | 0.05 | 0.51 | 2.82 | 2.06 | 0.72 | 2.95 | 2.11 | 2.33 | 0.28 | 1.69 | T | 1.04 | 16.56 |
| Custer County SD | |||||||||||||
| Custer | 0.33 | 0.61 | 0.64 | 3.78 | 1.95 | 3.29 | 3.74 | 1.80 | 1.32 | 1.63 | 0.16 | 0.68 | 19.93 |
| Edgemont 23NNW | 0.59 | 0.55 | 0.71 | 2.89 | M | 3.24 | 2.12 | 1.74 | 0.76 | 1.78 | 0.08 | M | 14.46 |
| Hermosa 3SSW | 0.37 | 0.40 | 0.76 | 3.73 | 1.46 | 3.11 | 5.62 | 0.97 | 1.14 | 2.12 | 0.22 | 0.52 | 20.42 |
| Wind Cave | 0.51 | 0.90 | 0.93 | 4.11 | 3.01 | 3.07 | 2.08 | 1.80 | 1.37 | 3.37 | 0.21 | 0.84 | 22.20 |
| Fall River County SD | |||||||||||||
| Ardmore 2N | 0.91 | 0.10 | 3.17 | 3.09 | 0.71 | 2.79 | 1.95 | 1.96 | 0.77 | 2.82 | 0.19 | 1.40 | 19.86 |
| Edgemont | 0.59 | 0.26 | 1.68 | 3.32 | 0.63 | 2.11 | 1.97 | 0.73 | 0.76 | 1.97 | 0.51 | 0.43 | 14.96 |
| Hot Springs | 0.80 | 0.36 | 1.46 | 3.80 | 1.55 | 3.17 | 1.66 | 2.30 | 0.99 | 3.51 | 0.43 | 0.72 | 20.75 |
| Oelrichs | M | M | M | M | M | M | M | 2.01 | 0.77 | 2.99 | 0.82 | 1.25 | 7.84 |
| Oral | 0.49 | 0.62 | 1.43 | 3.28 | 1.65 | 3.73 | 2.15 | 2.56 | 0.83 | 2.44 | 0.27 | 0.81 | 20.26 |
| Haakon County SD | |||||||||||||
| Kirley 6N | 0.02 | 1.86 | 2.06 | 0.72 | 0.60 | 2.75 | 4.58 | 3.39 | 0.02 | 4.42 | 0.03 | 1.30 | 21.75 |
| Midland | 0.15 | 1.52 | 0.60 | 1.40 | 0.26 | 2.24 | M | 3.70 | 0.65 | 3.63 | 0.10 | M | 14.25 |
| Milesville 5NE | 0.09 | 1.26 | 2.83 | 1.13 | 0.59 | 1.70 | 5.52 | 1.98 | 0.52 | 4.24 | 0.08 | 1.56 | 21.50 |
| Harding County SD | |||||||||||||
| Camp Crook | 0.13 | 0.79 | 2.11 | 1.30 | 1.00 | 3.01 | 1.44 | 0.79 | 0.56 | 1.84 | 0.04 | 0.56 | 13.57 |
| Harding 3SE | T | 0.40 | 1.03 | 0.88 | 1.14 | 2.62 | 3.40 | 1.64 | 0.87 | 1.61 | T | 0.64 | 14.23 |
| Ladner 9SW | 0.31 | 1.20 | 3.05 | 1.66 | 1.26 | 3.89 | 3.83 | 1.29 | 0.49 | 2.16 | 0.16 | 1.30 | 20.60 |
| Ludlow 3SSE | 0.02 | 0.56 | 2.08 | 0.89 | 0.61 | 2.02 | 1.56 | 1.33 | 0.77 | 1.72 | T | 0.54 | 12.10 |
| Redig 11NE | 0.06 | 0.34 | 1.50 | 1.04 | 0.90 | 1.82 | 2.28 | 1.75 | 0.76 | 2.06 | T | M | 12.51 |
| Jackson County SD | |||||||||||||
| Cottonwood 2E | 0.38 | 1.17 | 1.63 | 2.08 | 0.31 | 2.13 | 2.88 | 1.18 | 0.31 | 3.89 | 0.15 | 1.02 | 17.13 |
| Interior 3NE | 0.53 | 1.26 | 2.55 | 2.54 | 0.54 | 2.33 | 1.07 | 0.99 | 0.08 | 4.58 | 0.17 | 1.07 | 17.71 |
| Lawrence County SD | |||||||||||||
| Bear Ridge | 1.03 | 1.01 | 3.77 | 3.23 | 2.33 | 3.12 | 1.49 | 4.93 | 0.46 | 3.30 | 0.18 | 2.17 | 27.02 |
| Deadwood 2NE | 1.62 | 1.47 | 6.26 | 3.16 | 1.90 | 3.35 | 3.51 | 3.69 | 1.82 | 5.28 | 0.32 | 2.96 | 35.34 |
| Lead | 2.22 | 1.73 | 5.12 | 2.95 | 2.20 | 3.73 | 3.33 | 3.20 | 1.91 | 5.44 | 0.41 | 2.84 | 35.08 |
| Spearfish | 0.26 | 0.53 | 3.24 | 2.26 | 0.80 | 3.61 | 1.63 | 3.15 | 0.76 | 2.89 | 0.11 | 1.61 | 20.85 |
| St. Onge 2S | 0.54 | 1.01 | 3.91 | 3.63 | 2.38 | 2.38 | 2.32 | M | M | 3.19 | 0.10 | 1.71 | 21.17 |
| Meade County SD | |||||||||||||
| Elm Springs 3ESE | 0.34 | 0.78 | 2.50 | 2.90 | 1.55 | 2.27 | 2.84 | 2.44 | 0.55 | 3.29 | 0.04 | 1.15 | 20.65 |
| Faith | 0.06 | 1.35 | 2.13 | 1.79 | 2.22 | 2.73 | 3.29 | 2.79 | 1.04 | 2.80 | 0.00 | M | 20.20 |
| Ft. Meade/Sturgis | 0.55 | 0.66 | 2.89 | 2.49 | 0.81 | 3.61 | 2.97 | 2.82 | 0.94 | 3.13 | 0.19 | 0.90 | 21.96 |
| Hereford 12SW | 0.43 | 1.04 | 2.77 | 3.09 | M | M | 3.12 | M | M | M | T | M | 10.45 |
| Opal/Maurine 12SW | 0.18 | 0.94 | 3.70 | 1.46 | 1.51 | 2.31 | 5.29 | 3.21 | 0.70 | 2.07 | T | 1.35 | 22.72 |
| Plainview 6SSW | M | 0.60 | 2.62 | 2.26 | 1.31 | 3.30 | 3.12 | 2.66 | M | 2.60 | 0.04 | 1.41 | 19.92 |
| Red Owl | 0.30 | 1.14 | 3.18 | 1.81 | 1.13 | 2.22 | 3.33 | 4.26 | 0.85 | 2.31 | 0.02 | 1.40 | 21.95 |
| Mellette County SD | |||||||||||||
| Cedar Butte 1NE | 0.24 | 1.60 | 1.47 | 2.40 | 0.90 | 2.83 | 4.93 | 1.89 | 0.31 | 3.28 | 0.02 | 0.62 | 20.49 |
| Wood | 0.30 | 1.07 | 0.87 | 3.04 | 1.07 | 5.23 | 3.31 | 2.49 | 0.43 | 2.92 | 0.05 | 0.64 | 21.42 |
| Pennington County SD | |||||||||||||
| Hill City | 0.51 | 0.46 | 1.35 | 3.54 | 1.43 | 2.54 | 3.54 | 1.73 | 2.14 | 2.28 | 0.18 | 0.88 | 20.58 |
| Johnson Siding | 0.51 | 0.62 | 2.84 | 3.65 | 1.21 | 3.46 | 1.85 | 2.03 | 2.60 | 2.27 | 0.07 | 1.28 | 22.39 |
| Medicine Mountain | M | M | M | M | M | 3.30 | M | M | M | M | M | M | 3.30 |
| Mount Rushmore | 0.57 | 0.60 | 1.56 | 5.47 | 2.55 | 3.70 | 5.28 | 1.55 | 1.96 | 2.98 | 0.28 | 0.89 | 27.39 |
| Pactola Dam | 0.52 | 0.54 | 1.50 | 3.15 | 0.90 | 4.25 | 3.59 | 2.24 | 2.40 | 2.29 | 0.19 | 0.57 | 22.14 |
| Rapid City 4NW | 0.43 | 0.48 | 1.33 | 3.29 | 1.59 | 4.36 | 1.38 | 1.35 | 2.75 | 2.75 | 0.14 | 0.56 | 20.41 |
| Rapid City Airport | 0.37 | 0.77 | 2.07 | 3.65 | 0.94 | 2.83 | 1.78 | 1.48 | 1.90 | 1.97 | 0.17 | 0.72 | 18.65 |
| Rapid City NWS | 0.41 | 0.53 | 1.46 | 3.66 | 2.58 | 4.47 | 1.42 | 1.24 | 1.62 | 2.56 | 0.18 | 0.62 | 20.75 |
| Wasta | 0.27 | 0.87 | 1.53 | 2.90 | 0.90 | 3.03 | 1.71 | 2.30 | 0.64 | 3.53 | 0.10 | M | 17.78 |
| Perkins County SD | |||||||||||||
| Bison | 0.36 | 1.72 | 2.32 | 1.43 | 1.59 | 3.26 | 2.34 | 1.15 | 0.34 | 2.92 | 0.00 | 1.53 | 18.96 |
| Lemmon | 0.55 | 1.50 | 1.87 | 0.88 | 2.01 | 3.13 | 6.57 | 1.78 | 0.70 | 2.46 | T | 1.15 | 22.60 |
| Lodgepole 5SW | 0.20 | 1.11 | 1.99 | 1.00 | 1.48 | 1.69 | 2.07 | 1.58 | 0.14 | 2.16 | 0.00 | 0.72 | 14.14 |
| Shadehill | 0.18 | 1.91 | 2.41 | 1.26 | 1.47 | 3.32 | 2.15 | 1.31 | 0.69 | 2.17 | 0.02 | 1.56 | 18.45 |
| Usta 8WNW | M | 1.02 | 1.11 | 0.88 | 1.86 | 2.59 | 3.91 | M | M | M | 0.00 | M | 11.37 |
| Shannon County SD | |||||||||||||
| Oglala | 0.70 | 0.67 | 1.52 | 3.51 | 0.74 | 3.38 | M | 2.16 | 0.68 | 3.67 | 0.56 | 1.66 | 19.25 |
| Porcupine 11N | 0.14 | 0.96 | 2.48 | 3.84 | 0.56 | 3.75 | 1.53 | M | 0.83 | 4.69 | 0.21 | 1.51 | 20.50 |
| Todd County SD | |||||||||||||
| Mission | 0.33 | 1.47 | 1.61 | 2.86 | 0.90 | 3.05 | 5.79 | 3.42 | 0.56 | 2.41 | 0.15 | 1.45 | 24.00 |
| Mission 14S | 0.41 | 1.04 | 1.76 | 3.65 | 0.56 | 5.12 | 5.12 | 2.83 | 0.65 | 2.35 | 0.09 | 1.22 | 24.80 |
| Tripp County SD | |||||||||||||
| Winner | 0.52 | 0.85 | 0.43 | 3.65 | 0.66 | 4.27 | 2.89 | 5.09 | 0.97 | 3.11 | 0.09 | 1.27 | 23.80 |
| Ziebach County SD | |||||||||||||
| Dupree | 0.35 | 1.43 | 1.93 | 1.92 | 2.17 | 3.13 | 3.19 | 1.71 | 0.67 | 2.29 | 0.00 | 0.67 | 19.46 |
| Dupree 15SSE | 0.19 | 1.28 | 2.59 | 1.76 | 1.56 | 2.70 | 2.78 | 2.90 | 0.70 | 3.48 | 0.04 | 1.38 | 21.36 |
| Glad Valley 2W | 0.24 | 2.03 | 2.64 | 1.82 | 1.95 | 3.01 | 3.14 | 1.84 | 2.69 | 2.62 | T | 1.21 | 23.19 |
| Campbell County WY | |||||||||||||
| Dillinger | 0.72 | 0.25 | 2.78 | 3.08 | 0.61 | 2.28 | 1.98 | 2.25 | 0.31 | 2.02 | 0.05 | 0.63 | 16.96 |
| Gillette 4ESE | 0.70 | 0.29 | 1.84 | 1.68 | 0.64 | 1.88 | 1.91 | 2.10 | 0.41 | 1.97 | 0.05 | 0.74 | 14.21 |
| Weston 1E | 0.73 | 0.78 | M | M | 0.69 | 2.83 | 1.45 | 2.24 | 0.56 | 1.23 | 0.00 | 0.61 | 11.12 |
| Wright 12W | 0.67 | 0.22 | 1.12 | 1.68 | 1.02 | 1.79 | 2.41 | 1.83 | 0.40 | 1.40 | 0.09 | 0.37 | 13.00 |
| Crook County WY | |||||||||||||
| Colony | 0.15 | 0.70 | 2.10 | 1.09 | 0.51 | 5.41 | 1.63 | 3.93 | 0.33 | 1.08 | 0.00 | 0.70 | 17.63 |
| Devils Tower | 1.11 | 1.15 | 3.17 | 2.56 | 1.05 | 3.18 | 1.06 | 2.76 | 0.73 | 2.26 | 0.13 | 2.34 | 21.50 |
| Hulett | 0.72 | 1.15 | 3.60 | 2.56 | 1.14 | 3.35 | 2.20 | 2.68 | 0.47 | 2.03 | 0.08 | 1.60 | 21.58 |
| Moorcroft 3S | 0.64 | 0.25 | M | 1.56 | 2.13 | 1.37 | 0.77 | M | M | M | M | M | 6.72 |
| Rockypoint 7NNE | M | 0.83 | 1.10 | 1.76 | 1.25 | 2.59 | M | 1.84 | M | M | M | M | 9.37 |
| Sundance | 0.85 | 0.47 | 1.43 | 2.80 | 1.61 | 2.33 | 2.97 | 4.02 | 0.51 | 1.91 | 0.06 | 0.61 | 19.57 |
| Weston County WY | |||||||||||||
| Newcastle | 1.06 | 0.57 | 0.66 | 2.73 | 1.09 | 3.06 | 2.38 | 2.01 | 0.49 | 1.43 | T | 0.80 | 16.28 |
| Upton | 0.75 | 0.07 | 0.63 | 2.15 | 0.50 | 2.20 | 1.80 | 2.22 | 0.40 | 2.30 | 0.05 | 0.20 | 13.27 |
| Upton 14ENE | 1.25 | 0.50 | 1.31 | 2.43 | 1.35 | 2.54 | 2.01 | 2.08 | 0.88 | 2.66 | 0.08 | 1.99 | 19.08 |