SAINT HELENS RFD, OR

Maximum of Precipitation (Inches)

(357466)

File last updated on March 29, 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
1976-----z-----z-----z-----z-----z-----z-----z1.00 0.73 0.56 0.32 0.57 -----z
19770.37 0.78 0.82 0.29 0.78 0.30 0.28 1.20 0.67 0.68 0.98 2.10 2.10
19780.79 -----z0.75 0.64 1.00 0.58 0.80 0.37 0.86 0.52 0.93 0.54 -----z
19790.32 0.86 0.48 0.72 1.31 0.44 0.29 0.60 -----z-----z1.28 0.92 -----z
19801.50 0.88 0.70 0.92 0.67 0.71 0.27 0.24 0.29 0.40 1.05b1.70 1.70b
19810.65 1.10 0.64a0.55a0.66 1.02 0.09 0.01 0.72 1.53 1.47a1.92 1.92c
19821.74 1.47 0.62 0.75 0.29 0.52 0.25 0.49 1.80 1.28 1.17 1.77 1.80
19830.67h1.40 2.75 0.65 0.62 0.62 0.70 1.39 0.50 0.46a1.50a1.10 2.75j
19840.85a0.61 0.46 0.82 0.90c1.14 0.05 0.18 0.69 0.95 2.00 0.80 2.00d
19850.18b0.84 0.78 0.28 0.48 0.90 0.30 0.75a0.96 1.05 0.58a0.62a1.05e
19861.25 2.00 0.57a0.41d0.94 0.25 0.45 0.16 -----z0.81 1.17 0.75a-----z
19871.20 1.80 1.81 0.38 1.07 0.11 0.64 0.44 0.12a0.24 0.91 1.84 1.84a
19881.95 0.58a0.95 0.45 0.75 0.57a0.43a0.89 1.67 0.13 1.50a0.64 1.95d
19890.88 0.76 0.57 0.90 0.57 0.60 0.61a0.65 0.18 0.72 0.84 1.20 1.20a
19902.30 0.90b0.54 0.61 0.42 0.42 0.30 0.32 0.31 1.80 1.20 0.78d2.30f
19910.59 0.86 1.20 1.85 0.40 1.30 0.20 0.60 0.30 0.56 1.12 1.14 1.85
19920.88 2.21a0.36 1.20 0.03 0.55 0.41 0.38 0.70a1.20a1.45b1.40a2.21f
19932.00a0.31 1.11a1.02a1.42 0.70 0.80 0.08 0.03 0.80 2.80 1.31a2.80d
19940.57a1.23 0.45a0.69 0.31a0.60 0.03 0.09 1.16 1.92a1.06 1.80 1.92d
19950.98a1.15 1.90 0.87 0.89 0.40 1.10 0.44c0.58 1.99 1.66a2.00a2.00f
19961.01b2.74 0.79 1.75 1.00 0.85b0.33 0.30 1.00 1.10 2.40 1.21 2.74d
19971.46 0.81 1.30 0.60 0.60 0.97a0.33 0.63 0.85 1.16 1.82 1.00 1.82a
19981.32 0.83 0.79a0.28 0.88a0.59 0.25 0.03 0.90 1.10b2.05a1.10 2.05e
19991.16c1.80 0.98 0.66 0.56 0.60a0.40 0.21c0.21b0.93a2.09c0.67 2.09m
20000.67 1.01c1.10a1.05 0.75 2.00 0.20 0.35a0.72 0.95 0.50a1.43 2.00f
20010.42a0.64 0.55a0.40b0.39e0.60 0.40 0.53 0.70 0.70d1.56 1.65f1.65s
20021.87h1.22e1.40i0.49 0.35a0.46 0.04 0.18 0.22a0.34 0.90a1.70a-----z
20031.88b0.75a1.23e0.93 0.34 0.15 0.09 0.43 0.94 0.53 0.41a0.90 1.88i
20041.50e1.00e0.79 0.93 0.88 0.93 0.00 1.32 1.05 1.32 0.50 1.55 1.55j
20050.70h0.45 1.10 0.75f0.91 1.90a0.40 0.49b1.12b1.31i1.40 1.64a-----z
20062.02d1.15b1.15b0.44 -----z0.41c0.20 0.21 0.88 0.75 2.50f1.30 -----z
20071.48s0.86a0.75e0.65j0.60f0.36a0.18 0.30 0.63i0.58 0.99 3.90h-----z
20082.10d1.86b0.46a0.40p0.37 1.00g0.08b0.57e0.00 1.28 1.55b0.10d-----z
20091.50 0.70 0.90a0.42 0.92 0.14 0.00 -----z-----z-----z-----z-----z-----z
2010-----z-----z-----z0.80 0.55a1.32a0.33 0.00 0.58 0.95 1.15 1.33 -----z
20111.67 1.30c1.18 0.85a0.71c0.29b0.56b0.01f0.27f0.64c2.96b1.10e-----z
20121.80d0.80e2.00d0.45d1.30e0.90i0.04h0.00i0.02k0.90g2.10b1.87g-----z
20130.93e0.66f1.20e0.90e1.10f1.06g0.00f0.19l2.23a0.36p0.97 0.86d-----z
20140.66e1.57g1.70e1.00c0.98g1.75n0.48b0.16n0.46 1.10u1.21e2.20 -----z
20151.20g1.56k2.00o0.75u-----z-----z-----z-----z-----z-----z-----z-----z-----z
Period of Record Statistics
MEAN1.18 1.11 0.98 0.74 0.71 0.69 0.34 0.47 0.73 0.91 1.34 1.23 1.97
S.D.0.59 0.54 0.52 0.36 0.32 0.44 0.25 0.36 0.50 0.46 0.62 0.51 0.41
SKEW0.16 1.21 1.47 1.30 0.25 1.37 0.94 1.04 1.02 0.66 0.73 0.05 0.65
MAX2.30 2.74 2.75 1.85 1.42 2.00 1.10 1.39 2.23 1.99 2.96 2.20 2.80
MIN0.18 0.31 0.36 0.28 0.03 0.11 0.00 0.00 0.00 0.13 0.32 0.10 1.20
YRS33 34 36 35 34 34 36 34 33 33 37 35 13