HALF MOON BAY, CA

Total of Precipitation (Inches)

(043714)

File last updated on April 19, 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
1939-----z-----z-----z-----z-----z-----z0.00 0.00 0.48 0.55 0.46 0.90 2.39f
194010.23o8.33 6.32 0.48 0.41 0.00 0.00 0.00 0.37 1.11 0.51 6.19 23.72a
19418.58 7.05 4.99 4.88 1.07 0.11 0.03 0.00 0.00 1.09 2.00 8.93 38.73
19426.36 4.27 2.61 4.16 1.32 0.12 0.00 0.00 0.16 1.24 4.50 3.09 27.83
19437.93 2.97 3.89 1.78 0.09 0.34 0.00 0.00 0.00 1.15 1.02 2.75 21.92
19443.67 5.79 0.77 2.76 1.05 0.45 0.00 0.00 0.00 2.99 5.60 3.67 26.75
19450.65 4.47 3.93 0.44 0.94 0.07 0.00 -----z0.04 2.09 4.48 7.23 24.34a
19461.68 2.89 2.44 0.18 0.89 0.00 0.20 0.00 0.08 0.29 3.32 2.59 14.56
19471.00 1.98 3.22 0.24 0.44 0.84 0.00 0.00 0.00 3.23 1.23 1.37 13.55
19480.65 2.17 3.38 3.52 0.52 0.11 0.00 0.00 0.04 0.55 0.66 4.99 16.59
19491.73 3.91 4.96 0.00 0.41 0.00 0.00 0.17 0.00n0.00c-----z-----z11.18c
1950-----z2.24d1.34 2.12 0.37 0.14 0.00 0.00 0.08 1.95 5.46 6.01 19.71a
19515.11 2.98 2.84 0.91 0.98 0.17 0.12 0.00 0.28 1.16 4.15 11.30a30.00
19529.31 2.20 6.21 0.62 0.45 1.14 0.03 0.00 0.15 0.27 2.66 11.36 34.40
19534.55 0.09o-----z3.17f0.60 0.56 0.00 0.53 0.12 0.67 3.33 1.04 11.40c
19544.18 2.58 5.03 1.49 0.06 0.64 0.10 0.55 0.08 0.23 1.96 4.53 21.43
19555.06 1.37 0.28 2.50 0.36 0.07 0.11c0.00f0.28 0.21 2.32 13.81 26.37a
195611.38c2.81a0.00 1.88 1.37a0.07 0.25a0.45 0.45 1.75 0.00 0.57 20.98
19573.31a4.42 5.98a1.65 4.10 0.08 0.00 0.08 1.08 3.17 1.78 3.88 29.53
19586.23a10.79a9.38 5.83 0.68 0.71 0.38 0.00 0.18 0.27 0.50 1.89 36.84
19595.07 5.64 0.64 0.42 0.36 0.00 0.00 0.21 3.66 0.40 0.00 1.97 18.37
19605.29 4.66 1.90 1.27 0.71 0.00 0.00 0.00 0.00 0.88 5.12 1.70 21.53
19612.98a1.89 3.25e1.06 1.73 0.22 0.00 0.10 0.57 0.12 3.66 3.18a18.76
19622.09 8.64 3.52 0.82 0.24 0.00 0.00 0.29a0.51 10.97 0.60 3.57b31.25
19633.44 3.65 4.33 5.08c0.64 0.00 0.00 0.03 0.09 2.48 4.00 1.04 24.78
19645.32 0.52 2.46 0.23 0.47 0.58 0.00 0.00 0.00 1.89 3.11 7.50b22.08
19654.41 1.40 1.58a5.22 0.00 0.06 0.00 0.23 0.00 0.00 5.58 4.96 23.44
19663.77 3.51 0.68 0.71 0.20 0.00 0.12 0.27 0.25 0.00 5.18 3.62 18.31
196710.44 0.25 6.18 7.43 0.25 1.44 0.00 0.00 0.00 0.76 2.13 2.89 31.77
19686.19 2.62 5.78 0.61 0.24 0.00 0.00 0.28 0.00 0.65 2.69 5.90 24.96
19698.06 8.68 2.07 2.76 0.06 0.40 0.00 0.00 0.21 1.73 0.76 4.55 29.28
19708.49 2.31 2.04 0.32 0.27 0.21 0.00 0.00 0.00 0.90 8.41 7.67 30.62
19711.61 0.76 3.49 1.51 0.53 0.08 0.28 0.36 0.40 0.23 2.29a5.10a16.64
19721.27 1.33 0.19 1.25 0.11 0.28 0.00 0.00 0.98 6.90 6.49 3.17 21.97
19738.78 7.33 -----z0.23 0.21 0.05 0.00 0.09 0.62 3.04 9.50 6.32 36.17a
19744.87 2.16 7.20 3.22 0.01 0.50 1.01 0.13 0.00 1.36 0.64 3.64 24.74
19752.95 4.88 7.11 2.14 0.10 0.28 0.52 0.59 0.02 4.49 0.85 0.69 24.62
19760.52 2.54 1.13 2.04 0.13 0.04 0.14 1.56 0.59 0.30 1.73 2.41 13.13
19772.26 1.31 3.15 0.20 1.23 0.00 0.16 0.27 1.59 0.47 3.37 5.60 19.61
19789.01 5.62 5.58 4.50 0.00 0.00 0.00 0.00 0.00 0.05 3.04 0.83 28.63
19798.11 6.27 4.83 0.89 0.85 0.00 0.29 0.13 0.00 3.23 3.97 5.76 34.33
19805.40 7.49 1.90 1.88 0.32 0.03 0.07 0.05 0.18 0.18 0.65 2.44 20.59
19817.48 2.42 4.71 0.24 0.33 0.00 0.00 0.42 0.37 3.98 7.08 6.00 33.03
198212.01 5.11 7.91 4.98v0.00 0.42 0.00 0.15 1.73 3.82a7.03 5.41 43.59a
19838.98 9.14a13.05a3.33 0.89a0.03b0.00 0.14 0.80 1.12 8.07c9.46 55.01
19840.26 2.15 2.12a1.09 0.20 0.46 0.06 0.33 0.18 3.81 9.86 3.20 23.72
19851.02a2.90 5.07 0.13a0.32 0.47 0.31 0.05 0.40 1.51 -----z3.18 15.36a
19864.98 11.48 7.12 0.50 0.84 0.09 0.08 0.25 2.22 0.42 0.32 3.10 31.40
19875.10 3.87a4.16 0.95 0.06 0.08 0.00 0.10 0.00 2.13a2.63 6.03 25.11
19884.48 0.58 0.12 3.04 0.69 0.29 0.15q0.01 0.02 0.94 3.55 5.17 18.89a
19892.01 1.30 7.95 1.83 0.31 0.10 0.13a0.27 0.95 2.05 1.95 0.03 18.88
19904.29a2.52 1.33 0.29 2.82 0.46a0.24 0.14 0.33 0.55 0.74 2.58 16.29
19910.56 4.19 8.81 0.90 0.67 0.32 0.27 0.92 0.25 2.63b1.01o3.60b23.12a
19923.87 8.33g3.13k0.40s0.06t0.85v0.02 0.18 0.12 3.00l0.55p8.10 12.29g
19939.21k5.59i3.12j1.68 1.38 0.48a0.06 0.17c0.21a0.62 1.55d2.77r6.15d
19942.63o5.61 0.77k1.85c1.64b0.11 0.13 0.17 0.09 0.08 5.34a3.93 18.95b
199511.38 0.26 8.71l2.35 1.54 0.78 0.05 0.05 0.15 0.07 0.30 8.25 25.18a
19968.27 7.05 3.34 1.98 2.16 0.13 0.06 0.07 0.20 1.47 2.71 8.83 36.27
19979.86 0.29 0.59 0.96 0.44 0.57 0.13 0.77 0.08 0.77 7.84 3.65 25.95
199812.13 15.70 2.58 2.73 4.01 0.30 0.18 0.06 0.25 0.99 3.75 2.12 44.80
19996.40 7.60 4.82 2.73 0.12 0.46 0.05 0.34 0.21 0.82 2.94 0.93 27.42
20007.53 11.27 2.45 3.10 1.72 0.18 0.26 0.19 0.41 3.74 1.30 0.69 32.84
20015.75 6.44 1.67 2.19 0.02n0.12b0.28 0.39 0.26 0.47 -----z-----z17.57c
2002-----z-----z-----z-----z-----z-----z0.18a0.21c0.17b0.17f2.70d9.00m3.26h
20031.34e3.46j-----z-----z-----z-----z-----z-----z0.25d0.22 2.27 8.81 12.89g
20043.33 6.37 1.39 0.31 0.15 0.05 0.34 0.33 0.29 4.60 1.38 8.66 27.20
20056.11 5.28 5.52 1.69 2.32 1.31 0.23 0.04 0.15 0.57 1.89 9.94 35.05
20064.68 2.64a9.50 5.37 0.50 0.07 0.15 0.00a0.07 0.54 2.38 4.26 30.16
20071.43 6.03 0.91 1.96 0.46 0.10 0.38 0.06 0.27 2.17 1.08 3.72 18.57
20088.64 3.62 0.35 0.17 0.11 0.08 0.17 0.23 0.07 0.42 2.66 2.65 19.17
20091.17 8.76 2.66 0.41 1.39 0.15 0.21 0.17 0.53 3.05 0.44 2.66 21.60
20106.40 3.41 2.33 3.59 2.06 0.49 0.00 0.28 0.30 1.10 2.95 7.71 30.62
20111.47a4.01a6.02 0.64 1.16 2.11 0.30 0.37 0.03a2.26 1.76 0.39 20.52
20122.18 0.89 5.02a2.41 0.15 0.40a0.22 0.10 0.04 2.51a4.26 7.68 25.86
20130.39 0.70a1.34 0.76b0.24 0.54 0.03 0.26 0.85 0.00b1.24 0.23 6.58
20140.17 3.36 1.99 1.21 0.05b0.05a0.06 0.11a0.52 0.94a1.74 10.80a21.00
20150.00 1.16 0.18 0.75 0.11 0.08a0.05 0.08 0.11 0.16 1.70 5.16a9.54
20166.01a1.25 7.24 0.95 0.15 0.07a0.26 0.13 0.00b4.90 2.11a4.34 27.41
201710.27 7.92a3.61a3.27 0.02 0.24 0.04 0.17 0.24 0.46 3.97 0.16 30.37
20185.91 0.38 4.27 2.69 0.23 0.10 0.06 0.10 0.03 0.11 3.20 1.69 18.77
20194.02 7.71 5.12 1.32 2.66 0.15 0.10b0.25 0.32a0.04 1.62 4.49 27.80
20203.16 0.00 2.52 1.46 0.68 0.10 0.03 0.30 0.04 0.05 0.71 2.36 11.41
20212.88 2.56 1.83a0.06 0.14 0.13 0.20 0.07 0.18 5.29 0.84 11.31 25.49
20220.66 0.12 0.86a1.84a0.19 0.36 0.50a0.17 0.45 0.20 1.85 10.54 17.74
20238.55a4.28 8.44 0.40 1.92 0.20 0.14 0.26 0.24 0.34 1.78 4.91 31.46
20246.04 5.80 5.95 1.23o-----z-----z-----z-----z-----z-----z-----z-----z17.79i
Period of Record Statistics
MEAN4.91 4.16 3.78 1.80 0.74 0.28 0.12 0.19 0.33 1.53 2.89 4.66 25.14
S.D.3.24 3.11 2.68 1.55 0.85 0.36 0.16 0.24 0.54 1.80 2.27 3.16 8.24
SKEW0.37 1.06 0.82 1.29 2.00 2.60 2.58 3.01 3.83 2.39 1.18 0.72 0.64
MAX12.13 15.70 13.05 7.43 4.10 2.11 1.01 1.56 3.66 10.97 9.86 13.81 55.01
MIN0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 6.58
YRS80 80 77 79 80 81 83 82 84 83 80 81 66