SEATTLE TACOMA AIRPORT, WA

Average of Average Temperature (Degrees Fahrenheit)

(457473)

File last updated on April 24, 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
194541.87 42.20 43.23 46.72 57.00 58.82 65.32 63.79 56.68 52.35 43.18 38.95 50.84
194639.34 41.25 43.19 47.88 57.24 58.07 64.45 63.61 58.65 47.73 40.55 38.90 50.07
194735.00 43.93 47.65 51.10 57.79 59.83 63.56 62.81 59.13 51.85 43.05 41.98 51.47
194838.02 38.90 42.90 45.45 52.87 61.70 62.35 61.18 57.12 50.40 42.05 35.98 49.08
194929.94 37.30 45.55 50.08 57.29 59.05 62.58 63.69 60.75 48.56 49.40 38.37 50.21
195024.87 39.98 42.05 46.35 51.63 60.13 63.63 63.76 57.80 49.16 43.58 44.77 48.98
195136.92 40.69a39.34 49.53 54.18 61.10 64.35 61.61 59.03 50.79 44.52a36.44 49.87
195236.40 40.64 42.32 48.45 54.00 56.48 63.40 63.00 59.18 54.26 41.03 41.63 50.07
195344.29 40.18 42.95 46.78 52.60 55.47 61.84 62.73 59.65 53.16 46.67 42.26 50.71
195436.05 42.20 40.68 45.55 53.87 56.28 60.08 60.58 58.68 50.56 48.95 40.73 49.52
195539.13 38.20 39.11 44.55 50.66 57.95 60.05 60.92 56.98 50.35 38.87 38.34 47.93
195638.97 35.64 40.82 49.60 56.79 56.88 64.60 62.92 57.90 49.45 42.62 40.23 49.70
195732.58 39.50 44.40 50.12 57.92 60.33 61.77 61.61 62.70 50.69 43.47 43.63 50.73
195843.61 47.50 44.00 49.18 60.42 63.92 68.79 66.53 59.78 53.87 43.43 44.85 53.82
195940.77 40.96 44.16 49.57 53.45 59.55 66.05 62.27 57.42 51.98 43.88 40.26 50.86
196038.87 41.19 43.48 49.23 52.68 59.50 66.73 62.18 58.00 52.66 44.50 39.47 50.71
196143.61 44.39 45.23 47.03 53.79 63.43 67.03 68.35 58.70 50.84 41.85 39.32 51.97
196238.37 43.04 43.29 49.93 50.61 59.85 63.52 62.02 59.60 52.55 46.45 42.24 50.96
196333.90 48.18 43.76 48.28 57.71 59.85 62.35 64.55 63.52 54.45 44.42 40.74 51.81
196439.94 41.31 44.10 46.82 53.21 57.92 63.50 62.58 58.48 53.48 42.05 36.37 49.98
196540.19 42.93 46.95 49.45 51.85 60.78 67.74 65.73 58.32 56.40 49.42 40.42 52.52
196641.08 43.91 45.11 49.95 54.47 58.68 62.11 64.47 61.45 51.40 45.35 43.50 51.79
196742.34 42.80 42.11 46.52 55.42 62.68 66.44 71.08 65.67 54.76 47.28 41.55 53.22
196840.92 48.47 48.58 48.62 57.26 60.68 67.00 63.65 59.07 51.42 46.83 36.61 52.43
196933.10 42.30 46.89 48.87 58.03 64.25 64.66 64.00 60.93 52.44 46.55 45.19 52.27
197041.19 46.96 45.95 46.07 54.66 62.65 64.90 64.48 58.62 50.74 46.48 38.94 51.80
197139.66 42.30 41.31 48.92 54.48 55.87 65.52 67.71 57.57 50.94 45.72 37.50 50.62
197236.94 41.36 46.82 47.02 58.34 60.03 65.98 66.69 55.32 50.06 46.70 38.08 51.11
197338.73 43.88 44.11 48.60 56.47 59.28 64.69 61.56 61.83 52.19 43.70 44.37 51.62
197438.69 43.14 46.29 50.32 54.85 62.62 63.97 64.58 64.35 52.50 45.08 42.42 52.40
197538.73 40.79 42.87 45.80 54.56 60.65 67.50 63.21 62.95 51.42 44.90 41.48 51.24
197641.74 40.90 41.21 49.52 56.35 59.98 65.87 64.08 62.53 54.85 47.75 44.68 52.46
197739.40 48.66 45.69 53.55 54.45 63.00 65.13 68.45 58.90 52.18 43.85 42.13 52.95
197844.35 46.00 48.63 49.90 54.47 64.30 65.81 65.42 58.80 54.29 41.20 37.45 52.55
197937.81 42.25 49.32 50.80 57.18 62.48 67.39 63.94 62.60 54.18 43.87 44.06 52.99
198034.84 43.76 44.27 51.58 54.21 57.45 63.76 61.92 59.60 53.82 46.67 44.05 51.33
198144.35 44.18 48.79 49.57 54.69 57.50 63.27 68.06 61.02 50.90 47.12 41.66 52.59
198239.29 42.07 44.05 47.38 54.65 63.12 62.76 65.06 60.55 52.71 43.18 40.73 51.30
198344.92 46.91 49.32 50.68 57.66 59.88 63.24 65.61 58.25 51.63 47.73 36.11 52.66
198443.16 44.81 48.48 48.70 52.87 58.78 64.98 64.92 59.85 49.66 44.63 36.77 51.47
198537.10 38.98 43.27 49.13 54.84 60.03 68.58 65.13 58.10 51.35 35.78 36.15 49.87
198644.85 42.77 49.23 48.08 55.71 62.63 61.73 68.40 59.10 54.32 45.27 41.94 52.84
198740.45 46.23 48.94 51.95 56.92 62.55 64.18 66.13 62.52 55.74 48.53 39.21 53.61
198840.05 44.41 45.61 50.28 54.84 59.58 65.29 65.35 60.52 55.40 45.37 41.89 52.38
198940.53 35.88 43.69 53.42 55.97 63.18 64.47 65.24 64.03 53.06 46.93 42.87 52.44
199042.50 39.93 47.10 52.08 54.65 59.83 67.98 67.24 63.37 51.16 46.52 35.24 52.30
199139.95 47.70 44.13 49.05 54.31 58.83 66.76 66.56 62.83 52.87 47.30 43.69 52.83
199243.90 47.26 50.31 53.10 59.81 64.93 66.66 66.77 59.97 54.35 45.45 38.77 54.27
199337.85 42.29 48.11 50.52 59.61 60.52 61.13 65.47 61.83 55.37 41.97 41.40 52.17
199444.85 40.39 48.52 52.30 58.15 60.55 67.89 67.32 64.33 52.79 42.35 41.74 53.43
199546.35 45.91 47.79 51.75 60.10 62.68 67.00 62.92 63.98 52.45 49.08 42.39 54.37
199639.66 43.12 47.24 51.50 53.06 60.42 67.84 66.42 59.20 51.13 43.13 39.24 51.83
199741.06 41.89 44.74 49.15 58.16 59.42 64.44 67.73 62.15 51.29 48.42 41.48 52.49
199842.16 45.71 46.58 50.37 54.82 59.87 67.58 66.76 63.13 52.61 46.67 39.90 53.01
199941.95 42.50 44.27 48.50 51.82 58.13 62.42 64.76 60.78 52.13 47.90 41.95 51.43
200040.26 43.69 44.45 50.88 53.82 60.57 64.27 63.45 60.17 52.79 42.45 40.71 51.46
200141.98 40.66 45.39 47.95 55.35 57.57 62.42 64.77 59.75 50.89 46.67 41.48 51.24
200240.73 41.84 41.85 48.75 53.02 61.08 64.95 65.19 60.58 51.39 47.03 42.98 51.62
200345.73 41.61 46.79 48.88 54.77 62.80 67.82 66.39 62.58 54.23 42.82 41.73 53.01
200440.26 44.47 47.60 53.28 56.95 63.33 68.13 67.08 58.83 53.29 44.97 42.48 53.39
200542.10 42.57 49.05 50.75 58.21 59.92 65.55 66.74 59.50 53.98 42.90 42.63 52.82
200646.56 42.91 45.50 50.30 56.79 63.08 67.50 65.90 62.28 52.26 44.15 40.56 53.15
200737.98 43.62 47.11 50.62 56.56 60.32 67.76 65.60 59.92 50.53 44.32 39.79 52.01
200838.69 43.93 43.48 47.00 56.11 58.35 64.92 65.89 60.98 51.65 49.15 36.90 51.42
200939.05 41.62 41.69 49.17 56.24 63.77 69.45 65.58 62.40 52.24 46.62 37.90 52.14
201046.97 46.79 47.03 49.48 53.18 58.32 64.53 65.37 60.88 53.29 43.15 43.16 52.68
201141.77 39.25 45.15 45.53 52.32 59.38 64.16 65.82 63.98 52.19 43.05 39.16 50.98
201239.74 43.22 43.15 50.78 55.27 58.27 64.26 67.89 62.72 53.79 46.90 41.48 52.29
201338.23 44.41 47.92 50.85 58.60 64.77 68.03 69.44 63.45 51.68 47.88 39.71 53.75
201444.32 41.73 48.50 51.97 59.08 62.02 69.19 69.15 64.77 57.95 45.97 45.26 54.99
201545.06 48.75 50.52 51.37 59.13 67.67 71.24 68.71 60.50 57.24 43.83 42.97 55.58
201643.71 47.40 49.35 56.70 59.77 63.52 66.81 68.73 61.22 54.82 50.87 37.95 55.07
201737.85 41.32 46.05 50.63 57.92 62.90 67.32 70.26 64.68 53.19 46.67 40.05 53.24
201844.98 41.14 46.32 51.33 61.16 62.63 70.68 68.81 62.32 53.77 48.55 44.18 54.66
201945.00 36.66 48.44 52.45 60.48 63.63 67.50 69.10 62.78 50.84 46.63 44.45 54.00
202045.05 43.64 44.81 52.32 59.27 61.82 67.03 67.90 65.52 54.31 46.33 44.39 54.36
202143.82 41.43 45.56 53.00 56.90 66.05 68.00 67.47 61.88 51.82 47.88 38.02 53.49
202240.98 42.11 46.94 47.05 52.61 61.13 68.82 70.00 64.82 57.63 41.92 38.79 52.73
202343.48 40.68 44.56 48.50 60.89 61.98 68.52 69.90 62.02 54.56 44.83 45.48 53.78
202441.56 44.31 47.15 50.46g-----z-----z-----z-----z-----z-----z-----z-----z44.34i
Period of Record Statistics
MEAN40.41 42.75 45.41 49.55 55.82 60.74 65.46 65.48 60.79 52.58 45.12 40.80 52.07
S.D.3.83 2.89 2.64 2.24 2.55 2.45 2.43 2.48 2.34 1.98 2.65 2.62 1.50
SKEW-1.08 0.03 -0.17 0.17 0.13 0.18 -0.03 0.09 0.11 0.36 -0.53 -0.18 -0.16
MAX46.97 48.75 50.52 56.70 61.16 67.67 71.24 71.08 65.67 57.95 50.87 45.48 55.58
MIN24.87 35.64 39.11 44.55 50.61 55.47 60.05 60.58 55.32 47.73 35.78 35.24 47.93
YRS80 80 80 79 79 79 79 79 79 79 79 79 79