MOUNT RUSHMORE NATIONAL MEMORIAL, SD

Total of Precipitation (Inches)

(395870)

File last updated on December 10, 2025
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.

YEAR(S)JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANN
1962-----z1.38 0.75 0.42 10.88 6.21 7.63 0.50 1.29 1.70 0.54 0.02 31.32a
19630.53 0.36 1.90 5.32 1.83 8.53 3.71 1.43 3.11 0.90 0.04 0.31 27.97
19640.31 0.42 0.58 1.29 3.49 7.03 3.38 0.90 1.11 0.11 0.34 1.76 20.72
19651.08 0.16 0.84 1.89 8.92 7.72 5.01 3.10 2.61 0.17 0.22 0.43 32.15
19660.25 0.95 0.70 3.62 0.09 0.74 4.21 3.88 2.45 0.86 0.44 0.88 19.07
19670.29 0.48 0.66 2.73 4.31 7.73 1.52 1.40 1.38 0.35 0.44 0.64 21.93
19680.68 0.26 0.48 1.28 2.71 6.37 1.76 3.19 1.51 0.08 0.44 0.67 19.43
19690.43 1.16 0.67 1.60 2.27 4.50 7.09 0.78 1.17 1.60 0.21 0.21 21.69
19700.29 0.35 1.70 3.97 5.85 3.62 1.91 1.98 1.85 1.14 0.74 0.55 23.95
19711.16 0.76 1.73 5.95 8.00 2.03 1.94 1.80 2.84 1.45 1.07 0.40 29.13
19720.23 0.37 0.81 1.82 3.44 9.18 2.85 2.88 0.50 0.90 0.40 0.47 23.85
19730.12 0.40 1.76g3.54 1.23 1.99 3.72 1.09 1.54 0.48 2.10 0.71 16.92a
19740.60 0.21 0.18 0.87 1.59 1.74 2.61 1.40 1.26 2.20 0.35 0.12 13.13
19750.69 0.79 1.15 2.49g-----z4.66 1.31 1.15 0.14 0.34 0.76 0.85a11.84b
19760.13 1.14 0.44 4.33a3.86 5.64 3.75 2.34 0.83 0.11 0.20 0.20 22.97
19770.27 0.21 2.54 1.66 1.30 2.98 4.89 2.43 2.08 0.93 0.53 0.89 20.71
19780.42 0.71 0.26 2.35 7.55 1.56 4.61 1.62 0.70 0.39 0.66 0.66 21.49
19790.30 0.36 0.38 0.93 1.67 4.63 8.37 2.95 0.17 0.58 0.18 0.10 20.62
19800.23 0.26 0.79 1.31 2.30a2.77 2.80 3.27 0.58 2.00 0.25 0.38 16.94
19810.04 0.10 0.16 0.66 6.99 1.27 4.16 1.71 0.40 2.48 0.00c0.78 18.75
19820.56 0.35 0.94 0.90q5.34 4.14 2.01 2.06 2.01 1.41 0.34 0.39a19.55a
19830.12 0.05 1.44 0.63 3.40 3.02 0.64 1.93 0.31 2.51 1.25 0.45 15.75
19840.10 0.24 0.39 2.83 2.16 6.24 3.39 1.14 0.98 0.67 0.34 0.25 18.73
19850.23 0.00 0.83 0.42 0.76 1.13 1.72 0.59 2.53 0.37 1.83 0.79 11.20
19860.09a0.94 0.71 3.28 1.63 5.56 1.10 1.97 5.97 1.63 0.43 0.00 23.31
19870.04 1.43 2.24 0.00 4.79 0.78 1.70 2.61 0.59 0.69 0.00 0.37 15.24
19880.33 0.28 0.31 0.78 1.60 4.13 2.27 2.04 0.34 0.58 1.40 0.25 14.31
19890.06 0.88 0.95 1.67 1.68a2.40 1.63 2.11 5.14 1.04 0.33 0.62 18.51
19900.02 0.32b1.62 2.27 6.92 2.41 5.66 1.08 1.36 0.70 0.48 0.69 23.53
19910.12 0.57 0.50 4.24 6.48 5.91 2.59 0.98 1.74 1.33 0.90 0.00 25.36
19920.07 0.27 2.21 0.83 2.84 3.94 3.87 1.52 0.51 0.91 0.18 0.54 17.69
19930.72 0.85a0.80 3.33a5.99 5.06 3.25 1.76 0.92 1.64 0.52 0.48 25.32
19940.44 0.90 0.76 0.92 2.83 1.25 1.24 3.63 0.77 5.46 0.21a0.66 19.07
19950.10 1.00 1.31 3.19 10.25 4.97 4.39 1.41 1.47 3.09 0.41 0.16 31.75
19961.19 0.09a2.04 2.45 7.23 2.08 2.38 5.92a2.41 5.13 0.51a1.50 32.93
19970.34 1.00 0.53 3.77 6.08 2.54 5.35 2.01 3.08 0.88 0.13 0.33 26.04
19980.87 1.41 3.10 1.26 3.20 6.24 3.64 3.84 2.88 4.84 1.73 0.03 33.04
19991.40 0.18 0.92 2.74 2.13 10.09 4.26 1.39 1.67 0.45 0.19 0.25 25.67
20000.36 0.37 1.17 4.37 2.70 1.70 2.55 0.44 0.77 2.06 1.42 0.35 18.26
20010.46 1.14 1.04 2.14 3.62 4.58 4.91 1.87 2.40 1.68 0.84 0.14 24.82
20020.21 0.28 1.94a2.46 3.51 1.69 3.16 1.83 3.20 1.31o0.62 0.15 19.05a
20030.74 0.61a1.71 3.83 1.65 2.16 0.35 2.47 1.51 0.60 1.45 0.45 17.53
20040.45 1.28 0.37 1.62 2.75 1.89 3.31 1.35 2.96 0.50 0.13 0.01 16.62
20050.64 0.30 0.92 1.72 3.98 1.58 3.44 2.43 0.83 1.34 0.20 0.17 17.55
20060.17 0.50q2.84a1.57 3.75 3.22 1.31 3.03 1.64 0.52 0.79 0.18 19.02a
20070.20 0.73 1.27 2.01 3.65 1.15 2.09 1.73 1.20 1.07 0.09 0.48 15.67
20080.34 0.24 1.45 1.55c4.09c3.31 1.92a2.30 1.18 1.49 1.16 0.60 19.63
20090.57 0.60 1.56 5.47 2.55 3.70 5.28 1.56 1.96 2.98 0.28a0.89 27.40
20100.30 0.66 0.35 4.36 7.49 4.02 1.72 0.92 1.63 0.86 0.54 0.82 23.67
20110.68 1.22 1.43 1.18d9.16 2.48 3.81 3.24 0.67 0.75 1.78b0.60 27.00
20120.20 0.55 0.18 2.34 3.08 1.89 4.43 0.27 0.14 0.67 0.39 0.29 14.43
20130.61 0.24 1.02 4.39 1.58 2.17 3.56 4.72 1.31 3.57c0.52 0.44 24.13
20140.38 0.78 1.14 1.36 3.47 5.22 2.87 3.06 4.84 0.85 0.65 0.41 25.03
20150.27 0.27 0.18 2.48 10.13 7.75 2.40 4.24 0.28 1.54 0.47 0.67 30.68
20160.23 0.85 1.16 1.42 4.57 1.59 5.29 2.64 1.73 0.68 0.20 1.20 21.56
20170.86 1.20 0.64 4.11 2.34 3.30 4.08 1.79 1.50 0.59 0.56 1.15 22.12
20180.56 1.99 1.77 1.74 4.98 5.88 8.90 1.17 1.40 1.04 0.53 1.28 31.24
20190.33 1.13 2.13 2.96 8.95 4.22 7.03 4.18 5.07 1.94 0.74 0.31 38.99
20200.54 0.99 1.76 1.75 3.21 1.69 2.40 0.96 1.08 0.69 0.22 0.40 15.69
20210.17 0.90 2.10 2.74 4.05 1.92 3.04 1.26 1.40 1.73 0.01 1.04 20.36
20220.11 0.56 0.64 1.63 3.77 2.11 3.41 4.30 0.53 1.35 0.13 0.45 18.99
20231.13 0.58 2.28 1.59 6.14 4.81 2.71 2.09 2.95 3.39 0.22 0.62a28.51
20240.30 1.20 0.90 3.47 4.07 1.12 2.65 1.34 0.89 0.57 0.73 0.11 17.35
20250.25 0.50 0.85 1.92 3.83 3.34 6.49 1.86 1.40 1.90 0.45 0.12v22.79a
Period of Record Statistics
MEAN0.41 0.65 1.13 2.36 4.23 3.77 3.46 2.11 1.67 1.37 0.57 0.51 22.27
S.D.0.31 0.43 0.71 1.36 2.56 2.26 1.83 1.14 1.25 1.17 0.48 0.37 5.77
SKEW1.21 0.69 0.75 0.63 0.88 0.80 0.94 0.97 1.48 1.78 1.43 1.09 0.57
MAX1.40 1.99 3.10 5.95 10.88 10.09 8.90 5.92 5.97 5.46 2.10 1.76 38.99
MIN0.02 0.00 0.16 0.00 0.09 0.74 0.35 0.27 0.14 0.08 0.00 0.00 11.20
YRS63 63 63 62 63 64 64 64 64 63 64 63 57