PORTLAND INTL AIRPORT, OR

Total of Precipitation (Inches)

(356751)

File last updated on April 20, 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
1938-----z-----z-----z2.10 0.57 0.34 0.17 0.49 1.18 2.58 4.26 4.78 16.47c
19395.47 5.49 2.36 0.27 1.09 1.42 0.78 1.62 0.55 2.14 1.73 9.22 32.14
19402.56 11.41 4.95 3.29 1.60 0.02 0.80 0.06 3.54 4.13 4.53 4.85 41.74
19415.27 1.59 1.74 1.66 4.27 0.81 0.03 1.45 3.58 2.18 5.04 9.11 36.73
19423.63 3.53a1.63 2.38 2.84 1.94 1.40 0.17 0.06 3.49 11.57 9.37 42.01
19435.50 3.27 5.54 2.21 1.42 2.80 0.32 1.39 0.06 5.59 2.20a2.70 33.00
19442.81 3.11 1.93 2.28 1.07 0.81 0.06 0.03 2.73 1.64 5.00 1.90 23.37
19454.10 4.36 5.30 2.42 4.57 0.07 0.51 0.37 3.96 2.11 8.58 5.61 41.96
19465.12 4.99 4.23 0.78 1.24 1.91 1.08 0.18 1.15 4.81 7.57 5.47 38.53
19473.72 2.77 4.11 1.81 0.66 2.93 0.94 0.29 1.06 8.04 4.08 4.64 35.05
19485.87 5.02 4.24 3.41 3.76 1.42 0.32 1.55 3.28 2.39 6.89 8.06 46.21
19491.02 9.46 2.78 0.72 2.12 0.68 0.91 0.24 1.66 2.35 5.56 4.86 32.36
195010.10 5.77 4.76 2.74 0.57 2.50 0.50 0.72 1.45 7.00 8.67 6.31 51.09
19517.71 5.02 3.86 1.14 1.75 0.03 0.28 0.02 2.55 6.81 5.31 5.06 39.54
19524.40 3.59 3.82 1.45 0.78 2.23 0.00 0.18 0.33 0.72 1.44 6.76 25.70
195312.83 3.71 3.82 1.89 3.45 2.04 0.03 1.79 1.16 3.56 6.46 7.85 48.59
19548.95 4.57 2.55 2.54 1.83 3.58 1.24 1.92 0.85 3.40 5.09 5.01 41.53
19552.30 3.37 3.06 4.72 1.24 1.83 0.89 0.00 2.86 6.69 7.34 10.14 44.44
195611.66 2.04 4.30 0.53 2.50 2.03 0.01 2.56 1.12 5.10 1.47 3.64 36.96
19572.23 4.14 7.52 1.84 1.97 0.73 0.19 0.69 0.49 3.53 3.07 6.15 32.55
19586.56 5.13 2.20 3.33 1.35 3.04 0.00 0.02 1.05 1.49 6.39 5.06 35.62
19597.57 4.18 3.22 0.92 2.89 2.38 0.56 0.09 2.81 3.51 3.30 3.08 34.51
19603.93 4.00 4.77 3.33 3.37 0.52 0.00 1.00 1.37 2.39 8.63 2.61 35.92
19614.50 8.92 6.04 3.59 2.80 0.47 0.42 1.07 0.64 2.89 4.67 5.94 41.95
19621.58 3.43 4.25 3.15 2.56 0.78 0.06 1.49 1.66 3.31 9.32 2.59 34.18
19632.27 3.48 4.69 3.78 2.74 1.71 1.17 0.87 0.75 3.04 5.64 3.60 33.74
19649.51 0.78 2.28 1.56 1.04 1.96 0.68 0.90 1.61 0.84 6.78 9.92 37.86
19657.44 2.22 1.10 2.20 1.31 0.83 0.44 0.73 0.01 2.03 5.64 7.34 31.29
19665.74 1.70 4.71 0.85 0.91 1.02 1.19 0.59 1.70 3.06 5.50 6.89 33.86
19676.21 2.02 4.31 2.17 1.02 1.01 0.00 0.00 0.76 4.72 2.27 4.75 29.24
19684.58 6.64 2.68 1.91 3.63 2.20 0.14 4.53 2.20 5.03 6.23 11.12 50.89
19697.60 3.14 1.13 2.28 1.61 2.99 0.14 0.04 3.86 3.02 3.18 8.12 37.11
197011.81 4.77 2.58 2.94 1.55 0.49 0.05 0.00 1.10 2.85 5.72 7.49 41.35
19717.09 3.36 4.87 2.72 1.00 1.76 0.26 0.95 3.53 2.37 5.76 8.05 41.72
19725.71 4.08 5.41 2.98 2.23 0.68 0.56 0.67 3.06 0.87 3.78 8.79 38.82
19733.69 1.94 2.45 1.33 1.43 1.45 0.06 1.41 3.29 3.14 11.55 9.93 41.67
19748.51 4.61 5.65 1.76 1.74 0.80 2.01 0.07 0.21 2.14 6.73 6.05 40.28
19758.43 4.75 3.45 1.88 1.35 1.13 0.43 2.10 0.00 4.76 4.10 6.68 39.06
19765.14 4.92 2.93 2.34 2.29 0.78 0.66 3.29 0.73 1.48 0.77 1.38 26.71
19771.07 2.49 3.50 1.04 4.30 0.83 0.39 3.26 3.33 2.28 5.56 8.98 37.03
19784.85 3.28 1.49 3.96 3.17 1.69 1.36 2.05 2.07 0.36 3.83 2.51 30.62
19792.55 6.53 2.51 2.47 2.41 0.64 0.25 1.18 1.75 4.85 3.38 7.23 35.75
19808.51 4.01 3.11 2.58 2.19 2.50 0.19 0.39 1.56 1.18 6.47 9.72 42.41
19811.47 3.86 2.33 1.79 2.25 3.23 0.24 0.15 1.86 4.12 4.62 8.37 34.29
19826.31 5.98 2.38 3.56 0.46 1.66 0.94 1.66 3.98 4.44 3.51 8.16 43.04
19836.23 7.78 6.80 1.87 1.30 1.95 2.68 2.29 0.39 1.95 8.65 5.30 47.19
19842.01 3.93 3.19 3.20 3.41 4.06 0.00 0.09 1.46 3.85 9.74 2.56 37.50
19850.06 1.79 3.08 1.07 1.52 2.34 0.55 0.48 2.76 2.75 3.89 2.19 22.48
19864.65 5.31 2.60 1.91 2.19 0.23 1.20 0.10 4.30 1.99 6.26 4.30 35.04
19876.93 2.45 4.91 1.94 1.63 0.14 1.03 0.35 0.30 0.27 1.96 8.00 29.91
19884.95 1.17 3.13 4.57 2.53 2.34 0.69 0.10 1.76 0.19 7.92 2.37 31.72
19893.30 2.84 6.73 2.08 2.87 0.78 0.91 1.07 1.48 1.73 3.18 3.08 30.05
19907.95 3.43 2.52 2.31 2.37 1.94 0.32 0.95 0.34 4.65 3.68 2.40 32.86
19912.56 3.65 4.64 4.05 3.34 2.31 0.07 0.70 0.02 1.51 6.36 4.34 33.55
19924.31 4.12 1.87 3.82 0.10 0.60 0.67 0.49 1.12 2.87 4.55 4.98 29.50
19933.06 0.72 4.39 5.26 4.36 1.69 2.41 0.37 0.00 1.59 1.50 5.01 30.36
19943.56 4.92 1.84 1.91 0.56 1.67 0.07 0.13 1.13 8.41 5.91 4.85 34.96
19955.56 3.19 3.82 3.49 1.65 2.62 1.23 0.81 1.31 3.15 10.74 5.91 43.48
19967.15 10.03 3.24 5.12 4.88 0.44 0.73 0.25 3.05 5.38 9.58 13.35 63.20
19977.32 1.63 7.14 3.73 3.63 2.83 0.52 1.58 1.98 6.40 4.02 3.03 43.81
19986.77 5.27 4.06 1.04 5.55 1.73 0.59 0.00 1.09 2.16 11.02 6.74 46.02
19996.63 8.73 4.03 1.56 1.97 1.73 0.51 0.75 0.10 2.44 6.81 3.62 38.88
20005.66 4.50 3.21 1.82 2.70 1.19 0.15 0.12 1.67 3.25 2.46 3.47 30.20
20011.47 1.29 3.11 2.85 0.91 1.79 0.95 0.74 0.70 3.12 6.89 6.62 30.44
20026.22 3.55 3.40 2.34 1.86 1.57 0.19 0.04 1.54 0.63 1.91 8.00 31.25
20037.64 2.37 5.75 4.37 1.49 0.31 0.00 0.19 0.85 3.01 4.09 7.45 37.52
20044.86 3.95 1.53 1.01 1.78 1.12 0.04 2.68 1.03 3.36 2.38 3.91 27.65
20051.94 1.30 3.77 3.49 4.34 2.21 0.41 1.05 1.70 3.39 4.98 7.52 36.10
200610.92 2.15 2.96 2.46 3.00 0.92 0.47 0.10 0.86 1.39 11.92 5.85 43.00
20072.72 3.47 3.20 2.01 1.45 1.08 0.55 0.46 2.04 3.26 4.25 7.57 32.06
20084.71 2.19 3.71 2.08 2.02 1.00 0.29 1.23 0.48 1.74 4.15 3.52 27.12
20094.50 1.36 3.36 2.31 3.26 1.30 0.34 0.76 1.40 3.02 5.13 3.76 30.50
20104.94 2.76 3.58 2.92 4.68 4.27 0.59 0.23 3.36 3.87 6.63 8.35 46.18
20114.73 4.28 6.43 5.04 2.92 0.73 0.96 0.17 0.62 2.14 6.57 2.51 37.10
20126.82 2.83 7.89 3.25 3.37 4.10 0.21 0.00 0.04 6.14 8.23 7.56 50.44
20133.49 1.26 1.46 2.19 4.75 1.35 0.00 0.78 5.62 1.15 3.05 1.62 26.72
20142.70 5.12 7.52 3.03 2.39 2.33 1.05 0.01 0.98 5.94 2.99 6.05 40.11
20153.33 3.71 4.71 1.75 0.59 0.40 0.57 0.66 1.26 3.69 4.49 15.24 40.40
20167.23 4.10 4.73 1.96 1.72 1.42 0.66 0.09 1.69 8.31 6.83 4.61 43.35
20174.13 10.36 7.26 4.51 1.92 1.08 0.00 0.06 2.38 4.57 6.44 3.09 45.80
20185.36 1.86 2.50 3.34 0.17 1.03 0.02 0.06 1.59 3.43 2.86 5.08 27.30
20192.79 4.10 1.54 2.98 1.51 0.45 0.80 1.23 3.85 1.51 1.52 4.39 26.67
20207.58 1.55 2.43 0.79 2.21 3.51 0.05 0.38 2.06 1.51 5.28 5.09 32.44
20217.03 3.73 1.55 0.39 0.58 1.25 0.00 0.05 3.76 3.72 6.43 7.10 35.59
20225.10 2.77 2.96 5.73 3.78 3.09 0.17 0.00 0.31 3.18 5.17 7.76 40.02
20233.34 2.49 4.36 5.08 0.91 1.21 0.00 0.62 1.25 2.49 5.27 8.73 35.75
20249.43 4.29 2.70 0.62l-----z-----z-----z-----z-----z-----z-----z-----z16.42i
Period of Record Statistics
MEAN5.34 3.95 3.72 2.53 2.20 1.57 0.53 0.77 1.65 3.23 5.41 5.96 36.90
S.D.2.63 2.15 1.60 1.21 1.23 1.00 0.53 0.87 1.23 1.82 2.54 2.69 7.09
SKEW0.51 1.35 0.68 0.51 0.60 0.68 1.63 1.78 0.81 0.87 0.56 0.64 0.61
MAX12.83 11.41 7.89 5.73 5.55 4.27 2.68 4.53 5.62 8.41 11.92 15.24 63.20
MIN0.06 0.72 1.10 0.27 0.10 0.02 0.00 0.00 0.00 0.19 0.77 1.38 22.48
YRS86 86 86 86 86 86 86 86 86 86 86 86 85