SEATTLE TACOMA AIRPORT, WA

Average of Maximum Temperature (Degrees Fahrenheit)

(457473)

File last updated on May 12, 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
194547.58 47.68 49.81 54.30 65.68 68.37 77.16 75.19 65.50 60.39 49.13 45.55 58.86
194645.45 47.68 50.77 56.63 68.55 67.37 75.29 74.68 68.63 55.87 47.90 44.32 58.60
194740.94 51.50 57.19 61.17 69.23 70.03 74.84 74.68 69.47 58.65 48.67 47.58 60.33
194843.55 45.17 51.10 53.60 61.39 71.70 73.13 69.35 67.07 58.84 47.73 41.16 56.98
194937.26 44.07 53.23 59.40 68.42 70.80 74.06 74.45 71.00 56.61 56.17 43.52 59.08
195030.68 46.11 47.94 55.23 61.65 69.77 75.10 75.35 68.33 55.71 48.83 49.13 56.99
195142.16 46.75 46.39 61.07 64.61 73.23 76.35 73.26 69.47 57.84 50.79a41.65 58.63
195241.55 46.59 48.84 58.83 63.94 65.70 75.45 73.97 70.63 63.48 48.43 47.00 58.70
195348.97 46.04 50.10 54.93 61.71 63.27 72.23 72.81 69.70 60.81 52.87 46.94 58.36
195440.68 48.71 49.94 53.53 63.58 64.80 69.48 68.55 66.23 59.00 54.37 45.68 57.05
195543.65 44.32 46.06 52.83 58.94 66.67 68.65 71.32 66.03 56.65 44.37 43.61 55.26
195644.32 40.72 47.52 59.80 67.19 64.60 75.52 73.48 66.53 55.58 48.33 45.13 57.39
195737.87 45.61 50.32 57.83 66.65 68.70 70.94 71.00 73.50 57.81 49.87 48.58 58.22
195848.74 53.29 51.61 57.97 70.65 72.97 81.42 78.29 68.10 61.87 48.73 49.65 61.94
195945.10 45.96 50.32 56.93 62.48 67.57 76.94 71.71 64.43 58.16 49.97 45.13 57.89
196042.97 46.76 50.29 57.30 60.55 69.37 79.65 70.77 66.50 59.29 50.60 44.90 58.25
196149.74 49.18 52.29 53.93 62.39 74.10 78.45 80.32 68.33 58.55 48.50 43.74 59.96
196243.90 49.39 50.77 58.40 57.48 69.97 74.39 71.23 69.07 59.06 51.53 47.00 58.52
196338.68 54.96 50.94 55.33 67.94 67.80 70.94 74.06 73.30 61.29 49.80 45.58 59.22
196444.71 48.17 50.71 54.60 62.87 65.60 72.29 71.23 66.43 61.48 46.80 41.26 57.18
196544.58 48.29 56.52 57.50 60.65 71.37 79.45 74.61 66.47 63.81 54.50 45.19 60.24
196645.90 49.82 52.29 57.87 63.97 67.20 70.74 74.97 69.37 58.23 50.57 47.42 59.03
196746.39 48.68 48.26 53.67 63.94 72.03 76.68 83.74 76.37 60.90 52.50 45.52 60.72
196845.71 56.45 55.45 56.57 66.00 69.17 78.16 72.03 65.83 57.39 51.93 41.19 59.66
196936.81 48.32 54.65 56.33 67.94 73.43 75.26 73.16 68.97 59.84 51.30 49.71 59.64
197045.52 53.36 53.00 52.60 63.42 72.73 75.06 73.94 66.20 57.61 51.93 42.71 59.01
197143.58 47.11 46.94 56.83 62.84 62.73 75.65 77.77 65.50 56.81 50.00 41.77 57.29
197241.68 47.17 52.87 54.30 67.65 67.97 75.90 77.55 63.07 56.84 51.77 41.61 58.20
197343.52 50.57 50.29 57.30 65.68 66.93 75.35 70.74 70.30 57.90 48.37 48.52 58.79
197443.55 48.04 52.90 56.60 62.45 72.50 73.71 75.19 76.00 61.77 50.10 47.19 60.00
197543.10 47.00 49.81 53.60 64.10 69.63 78.00 71.55 73.33 57.03 50.53 46.52 58.68
197646.26 46.79 48.16 58.00 65.48 69.40 75.87 71.10 70.77 62.26 54.13 49.77 59.83
197744.71 55.86 51.52 63.17 61.90 72.60 75.23 79.68 66.80 58.97 49.10 46.68 60.52
197848.74 51.68 56.03 57.33 63.10 74.67 76.23 74.35 65.30 62.10 47.13 42.74 59.95
197943.39 47.75 57.55 58.73 66.77 73.30 78.68 72.90 70.90 60.74 49.77 48.87 60.78
198039.94 49.48 50.00 60.37 61.94 64.67 73.26 70.90 67.37 62.26 51.87 48.16 58.35
198150.52 50.54 55.97 57.07 62.52 65.00 72.29 79.10 70.47 57.03 52.87 46.03 59.95
198243.19 47.46 51.16 55.93 63.68 73.23 71.71 74.45 68.77 59.58 49.13 45.58 58.66
198349.97 52.64 55.77 59.53 66.32 67.47 71.26 74.03 66.10 58.06 52.47 40.71 59.53
198447.77 50.72 55.23 56.40 60.55 66.97 75.29 74.81 68.33 56.42 49.43 41.45 58.61
198542.94 44.57 50.65 56.80 63.84 69.23 80.94 75.77 65.93 57.68 40.63 41.35 57.53
198650.77 49.18 56.74 55.10 63.74 72.60 70.32 80.03 67.13 61.90 49.57 47.29 60.37
198745.71 52.61 56.55 61.10 66.29 73.80 74.32 77.55 73.27 65.35 54.13 44.55 62.10
198845.42 50.72 53.39 58.20 63.61 68.87 76.65 76.26 70.93 61.58 50.30 46.71 60.22
198945.32 43.21 50.29 63.03 65.00 73.17 73.90 74.97 75.10 60.23 51.80 47.26 60.27
199047.26 45.89 55.19 59.90 63.00 68.43 79.19 78.00 72.87 58.13 51.67 40.10 59.97
199145.00 54.68 51.03 57.07 61.84 67.10 77.71 77.13 73.37 61.74 52.10 48.35 60.59
199249.48 54.48 59.10 61.90 71.19 75.77 76.32 77.77 69.27 60.84 50.43 43.23 62.48
199343.48 50.46 55.84 56.97 68.71 68.57 68.68 74.90 73.50 62.84 48.77 47.13 59.99
199449.35 46.14 56.90 60.13 67.29 69.17 78.97 76.94 73.77 59.45 47.30 46.55 61.00
199552.03 51.32 55.74 59.80 70.00 72.20 76.71 71.68 73.37 59.42 54.47 47.48 62.02
199644.19 50.59 54.65 58.67 60.45 69.97 78.52 76.97 67.33 57.52 48.13 44.16 59.26
199745.68 48.39 51.06 56.90 67.03 66.97 73.68 78.13 70.83 56.71 55.30 47.35 59.84
199846.94 51.18 53.19 58.53 61.26 68.03 77.35 77.32 73.13 59.42 50.87 44.19 60.12
199946.03 47.50 50.58 57.30 59.61 65.70 71.74 73.42 70.90 59.39 53.20 46.06 58.45
200045.23 49.90 50.94 58.80 60.65 69.30 73.55 72.94 68.57 59.58 48.47 45.97 58.66
200147.61 47.68 52.10 55.03 64.90 65.27 71.68 73.77 67.70 56.84 51.53 46.71 58.40
200244.71 48.21 47.52 55.67 60.77 70.20 74.19 75.68 70.07 57.94 53.37 47.81 58.84
200351.10 47.46 52.42 55.30 62.87 72.40 78.97 76.71 71.70 60.19 48.53 46.58 60.35
200444.84 50.93 54.65 62.93 64.81 72.90 78.26 76.03 65.33 59.32 50.20 46.94 60.59
200547.42 51.04 56.23 57.93 65.81 67.40 75.32 77.32 68.13 59.74 47.53 47.35 60.10
200650.81 49.64 52.68 58.67 66.13 72.20 78.06 77.13 72.40 59.06 49.07 45.77 60.97
200743.58 48.71 53.48 58.70 66.39 69.30 77.26 74.77 67.37 57.06 49.43 43.61 59.14
200843.61 49.62 49.94 55.10 63.94 66.77 74.90 74.61 69.77 58.16 54.50 40.84 58.48
200943.68 48.50 48.00 57.70 65.87 73.13 80.97 74.68 71.57 58.55 51.97 43.71 59.86
201051.45 53.07 54.45 56.50 60.84 65.63 74.87 75.19 67.33 59.81 48.27 47.87 59.61
201146.23 45.04 51.39 52.23 59.74 67.60 73.58 75.84 73.50 58.00 49.30 44.29 58.06
201244.71 48.69 49.19 58.77 63.81 65.67 73.23 78.55 73.20 60.48 52.40 45.03 59.48
201343.00 49.04 54.87 57.63 67.32 73.83 78.97 79.00 70.43 57.61 53.70 44.65 60.84
201449.29 46.75 55.23 59.83 67.77 70.87 80.42 79.48 73.70 64.32 51.87 50.26 62.48
201550.29 54.54 57.87 59.90 68.03 78.90 82.58 78.97 68.53 63.58 49.43 47.06 63.31
201649.06 53.55 56.42 65.90 68.84 73.10 75.97 79.55 69.57 60.55 56.03 41.90 62.54
201743.68 46.64 51.55 57.30 67.00 72.10 78.32 81.52 73.80 61.10 51.33 45.55 60.82
201849.68 45.79 54.03 58.57 70.84 71.87 82.84 79.10 70.53 60.52 53.87 48.94 62.21
201951.13 41.75 57.19 59.33 69.74 73.37 76.45 78.32 69.43 57.97 52.57 48.16 61.28
202049.32 49.52 51.29 61.00 68.00 70.27 76.84 78.39 74.30 60.16 51.43 49.84 61.70
202148.81 46.57 53.19 62.77 65.71 76.57 79.13 77.81 70.33 57.87 53.07 41.87 61.14
202246.23 47.86 53.10 54.67 60.03 69.07 79.84 80.94 74.57 66.16 48.07 43.23 60.31
202348.39 46.32 51.97 55.33 70.61 71.97 80.06 79.87 70.60 61.39 51.00 50.58 61.51
202446.45 49.55 54.06 57.70 65.00t-----z-----z-----z-----z-----z-----z-----z51.94h
Period of Record Statistics
MEAN45.41 48.80 52.44 57.60 64.68 69.81 75.79 75.51 69.72 59.50 50.61 45.58 59.62
S.D.3.76 3.12 3.02 2.69 3.18 3.27 3.19 3.10 3.02 2.28 2.61 2.64 1.53
SKEW-0.85 0.22 0.05 0.40 0.08 0.12 -0.10 0.08 0.15 0.62 -0.48 -0.24 0.01
MAX52.03 56.45 59.10 65.90 71.19 78.90 82.84 83.74 76.37 66.16 56.17 50.58 63.31
MIN30.68 40.72 46.06 52.23 57.48 62.73 68.65 68.55 63.07 55.58 40.63 40.10 55.26
YRS80 80 80 80 79 79 79 79 79 79 79 79 79