MERWIN DAM, WA

Total of Precipitation (Inches)

(450242)

File last updated on March 28, 2024
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
1930-----z10.40i4.77s4.05m3.56n1.56t-----z-----z1.76y5.14w-----z-----z0.00l
1931-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z0.00l
193211.39 7.50 14.63 7.26 1.68 0.33 2.37 1.24 0.71 8.15 15.44 -----z70.70a
1933-----z-----z10.21 -----z-----z-----z-----z-----z-----z-----z5.21 25.19 40.61i
193414.34 2.01 6.85 2.92 -----z-----z-----z-----z3.93 10.09 15.67 15.56 71.37d
19357.79 4.03 -----z-----z-----z-----z-----z-----z-----z-----z4.38 7.05 23.25h
193614.45 7.94 7.75 0.86 6.04 5.76 2.06 0.39 1.18x1.90 1.05 16.15h48.20b
19377.15 9.40h4.89 9.87 1.92 6.83 0.00 2.99 2.23 5.52 16.36 14.93 72.69a
19386.56 7.40h9.69 3.94t1.61 -----z-----z1.48 1.99 4.12u8.58m7.85n21.33g
19398.96 10.42 4.85 0.48 1.61 3.93 1.64 1.65 1.30x6.01 3.35 10.87 53.77a
19402.77r15.07 6.10 3.58 3.09x0.25 1.79 -----z3.42 6.86 8.64 7.68 53.39c
19417.97 2.66 2.53 2.81 6.56 2.28 0.00 4.06 7.65 5.27 8.12 12.95 62.86
19423.18 6.41l3.00 3.02 5.34 4.71 2.62 0.85y0.33 4.27 15.73 12.88 55.08b
19435.04 7.38 8.28 3.98 2.18v2.12 0.58 -----z0.50 8.63 3.65 7.03 47.19b
19444.40 6.02 4.62 6.28 2.03 2.14 0.07 0.28 4.95 2.26 8.64 4.03 45.72
194510.14 7.37 11.54 6.37 4.72 0.26 0.35 0.72 4.51 3.79 14.23 7.92 71.92
194610.00 10.44 7.35 2.97 1.60 5.45 2.02 0.45 3.50 11.13 10.82 14.32 80.05
19478.74 4.94 4.98 5.22 0.22 6.55 1.54 0.41 2.24 13.35 12.41 8.36 68.96
19489.23 11.35 5.27 6.18 5.97 1.99 1.82 2.15 5.00 4.13 14.25 15.54 82.88
19492.04 16.06 4.15 1.33 2.97 2.04 0.64 0.64 2.03 6.45 8.23 11.75 58.33
195013.26 10.05 9.22 5.55 1.57 1.70 2.08 1.89 2.31 10.28 12.91 12.30 83.12
195112.55 7.45 8.44 0.99 2.66 0.40 0.61 0.57a4.96 11.42 8.34 11.16 69.55
19526.93 5.73 7.52 2.59 1.24 2.70 0.04 1.08 0.84 1.12 2.49 12.14 44.42
195319.62 6.25 6.67 3.19 4.61a2.80 0.36 2.50 0.89 5.50 10.09 15.32 77.80
195414.11 7.39 3.58 4.14 3.01 5.42 1.71 0.86 2.04 5.15 10.33 11.19 68.93
19554.73 7.90 10.98 8.19 2.39 2.40 2.14 0.00 4.00 14.36 15.72 14.83 87.64
195616.11 9.05 12.71 1.52 1.80 3.37 0.21 5.31 3.08a11.05 4.85 11.95 81.01
19576.85 8.50 10.86 3.92 3.75 2.42 0.82 1.29 0.77 5.55 8.87 15.98 69.58
195811.63 9.03 5.13 7.67 1.58 4.07 0.05 0.41 3.93 4.07 16.87 11.51 75.95
195916.51 8.47 7.69 4.52 5.41 5.48 1.16 0.53 7.24 9.27 10.78 7.83 84.89
19606.23 9.13 9.17 9.03 8.06 1.51 0.00 4.62 2.66 7.45 16.94 5.15 79.95
19619.91 20.85 11.40 7.40 4.73 1.26 0.55 0.98 1.48 8.10a10.43 13.10 90.19
19625.94 6.90 8.12 7.15 3.84 1.55 0.52 3.14 3.99 5.93 19.16 7.05 73.29
19633.92 8.94 8.88 7.57 3.63 3.40 2.34 1.65 2.46 6.46 11.07 9.08 69.40
196420.29 4.46 10.07 4.83 2.54 3.27 -----z2.11 2.81 4.09 11.08 17.08 82.63a
196517.48 6.92 1.53 3.40 2.90 0.59 0.15 2.06 0.34 4.27 8.44 12.90 60.98
196614.00 5.60 10.81 2.10 1.90 3.22 2.29 0.84 2.54 7.31 10.31 16.57 77.49
196718.48 5.87 10.52 5.98 1.50 2.47 0.00 0.00 1.13 12.05 5.98 9.95 73.93
19689.63 10.27 7.33 4.02 4.00 5.60 0.39 7.50 3.15 10.42 10.81 15.57 88.69
196913.64 7.75 2.56 4.60 4.10 5.64 0.42 0.16 5.42 8.92 5.03 11.00 69.24
197019.26 7.41 5.58 7.66 3.88 1.18 0.73 0.02 5.17 7.13 10.12 16.48 84.62
197119.18 9.58 11.54 4.85 2.72 5.07 0.78 1.06 3.46j-----z12.90 21.74 89.42b
197217.04 10.87 10.91 8.60 2.30 1.82 1.34 1.27 5.80 1.47 9.60 14.66 85.68
19736.90 3.21 4.98 2.80 3.64 4.07 0.10 1.27 5.77 6.53 22.04 18.09 79.40
197417.73 10.74 11.11 7.94 5.89 2.58 4.49 0.24 0.61 2.48 11.96 16.68 92.45
197517.58 9.26 8.07 4.20 3.98 2.83 0.43 5.42 0.15 11.94 11.05 17.31 92.22
197612.72 10.06 7.76 4.99 4.36 1.54 2.06 5.75 1.83 3.29 2.42 4.24 61.02
19772.48 6.10 11.02 2.19 6.95 2.12 0.72 5.13 7.30 4.35 12.39 19.35 80.10
19787.68 6.61 3.62 7.45 5.94 3.27 1.08 4.02 4.13 2.20 7.32 8.66 61.98
19793.19 14.42 4.50 5.29 2.65 1.15 2.04 2.44 5.35 8.41 5.59 12.77 67.80
198010.45 6.32 6.48 5.73 2.26 2.93 0.54 1.18 2.59 1.80 11.50 14.67 66.45
19812.42 9.43 5.01 7.32 4.75 7.26 0.50 0.19 3.09 6.98 7.40 14.50 68.85
198216.87 11.03 5.73 6.83 1.22 1.71 1.32 1.19 4.12 7.39 8.65 14.50 80.56
198314.53 11.80 9.66 4.08 2.70 5.21 4.91 2.70 3.73 4.04 17.18 7.19 87.73
19848.33 9.14 8.24 7.27 6.65 5.72 0.00 0.19 3.66 7.91 15.22 7.67 80.00
19850.38 6.48 8.00 3.05 2.36 4.35 0.69 1.59 5.17 7.68 10.13 3.12 53.00
19869.25 9.62 5.19 5.59 4.47 0.83 2.12 0.52 6.98 3.62 12.46 6.64 67.29
198711.09 7.42 10.90 3.29 4.66 0.86 1.26 0.72 0.63 0.11 6.25 11.48 58.67
19888.45 5.75 9.92 5.60 6.38 2.91 1.44 0.75 2.91 1.60 17.00 7.95 70.66
198910.61 5.29 12.00 4.02 3.54 2.28 1.27 4.00 0.74 5.12 8.95 4.71 62.53
199017.72 14.92 5.83 5.60 3.73 4.18 0.78 1.79 0.80 11.98 10.45 7.55 85.33
19916.52 8.08 9.07 11.46 4.50 2.78 0.21 0.75 0.69 3.62 14.62 9.79 72.09
19927.77 5.52 2.46 7.05 0.40 0.79 0.69 0.73 3.35 2.80 10.91 10.19 52.66
19935.84 0.83 7.49 11.72 5.43 5.18 3.68 0.44 0.07 2.10 3.79 8.92 55.49
19948.00 8.67 5.14 4.88 1.67 3.39 0.12 0.39d2.06 8.97 17.16 13.99a74.44
19958.34 5.85 6.50 5.99 4.19 3.16 1.76 3.49 5.71 8.27b19.02 8.30 80.58
199612.07 13.15 4.22 8.51 4.52 2.59 1.09 1.01 3.59 11.15 12.56 20.83 95.29
199711.70 6.69 11.86 6.61 4.95 5.23 1.20 2.72 5.22 10.09 8.89 6.14 81.30
199810.65 7.41 6.59 2.35 6.96 2.59 0.36 0.01 1.88 5.31 15.25 15.32 74.68
199911.34 15.74 7.75 1.87 5.65 -----z1.17 1.34 0.21 4.46 14.42 12.49 76.44a
200010.00 6.20 6.07 3.12 4.94 2.29 0.45 0.65 3.95 5.52 5.15 -----z48.34a
20014.06 2.78 5.87 5.53 2.15 2.92 1.23 1.95 1.20 7.19 9.71 13.06 57.65
200213.88 5.85 8.01 4.05 2.56 2.38 0.20 0.14 2.89 1.07 5.01 12.25 58.29
20039.83 5.79 11.01 8.59 2.35 0.85 0.12 0.11 2.07 5.55 8.83 11.74 66.84
200411.71 8.12 3.74 2.53 5.33 2.68 0.11 5.72 3.51 8.04 4.82 5.92 62.23
20056.53 2.32 6.89 7.42 5.84 3.24 1.11 0.57 -----z7.32 9.98 7.52 58.74a
200617.76 5.25 6.40 4.79 4.27 1.53 0.79 0.46 1.69 4.38 18.91 7.60 73.83
20076.54b9.24 6.37 3.36 1.81 1.92 0.95 1.18 1.72a5.52 6.25 15.46 60.32
200810.15 7.74 9.72 5.36 2.34 2.79 0.56 2.19 0.37 3.56 10.65 7.38d62.81
200911.15 1.78 5.93 6.18 -----z0.77 0.19 1.24 2.18 5.15 8.77 5.13b48.47a
20109.53 5.47 6.85 5.83a6.86 5.15 0.62 0.01 5.21 6.50 11.36 11.13c74.52
20119.76 6.55 11.79 9.04 2.69 1.08 0.93 0.19 2.13 4.80 11.36 5.13r60.32a
2012-----z7.68a12.29 6.98b3.85 4.04b0.18f0.00d0.06k7.22e8.40n11.74f42.06e
20138.58d4.57d4.10 4.78c6.54c1.12b0.02 1.39 9.73 1.70b6.67 8.11 57.31
20147.40a7.58a10.69 7.18 3.82 0.00o1.39 0.13 2.09g7.45 11.70 7.87c65.21b
20158.19 6.80 5.71a3.18 1.84 0.56 0.36 1.63 1.13 3.11b10.79a19.07a62.37
201611.09 9.11 10.19 2.53 1.76 2.47c0.86b0.45 2.52 14.40 11.30 11.14 77.82
20176.32 12.59 14.49 8.72 2.72 2.73 0.00 0.23 3.29 6.30 10.43 8.74 76.56
20189.59b9.02 6.07e6.84 0.19 1.00 0.00 0.52 1.49 6.48 5.69 10.77b57.66
20195.25 7.00 2.45 5.40 1.62 2.06 0.71 1.49 6.66 4.37 3.38 8.48 48.87
202019.24 8.16 5.65 3.19 3.10 5.00 0.28 0.32 2.98 4.22 11.06 8.91 72.11
202110.38 10.74a3.94g0.76 2.93 1.96 0.00 0.23 4.75 7.42 12.66 8.65c60.48a
20229.29 4.20 7.71 8.69 8.03 4.38 0.20 0.00 0.85 3.91 13.59 11.61a72.46
20238.34 5.86 8.97 10.57 1.28 1.67 0.09 0.68 3.04 6.68 9.55 16.00b72.73
202414.30e4.06f6.23j-----z-----z-----z-----z-----z-----z-----z-----z-----z14.30k
Period of Record Statistics
MEAN10.31 7.93 7.60 5.29 3.60 2.88 0.97 1.49 3.04 6.26 10.46 11.51 71.61
S.D.4.63 3.35 2.93 2.50 1.86 1.69 0.97 1.60 2.04 3.19 4.34 4.36 11.61
SKEW0.31 0.90 0.16 0.27 0.40 0.56 1.69 1.66 0.72 0.47 0.16 0.48 -0.18
MAX20.29 20.85 14.63 11.72 8.06 7.26 4.91 7.50 9.73 14.40 22.04 25.19 95.29
MIN0.38 0.83 1.53 0.48 0.19 0.25 0.00 0.00 0.07 0.11 1.05 3.12 44.42
YRS90 88 90 89 86 86 86 86 84 88 90 86 71