Weather Averages American Lake, WA

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Weather Averages for
American Lake, WA


Latitude: 47°5'N, Longitude: 122°35'W, Elevation: 301.0 ft, Distance: 4.27 mi

  Unit Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average temperature
over 34 years
°F 51 39 42 44 48 53 59 64 64 59 51 44 39
Average high temperature
over 34 years
°F 59 44 48 51 57 62 69 73 75 69 60 50 44
Average low temperature
over 34 years
°F 42 33 35 36 39 44 48 51 53 48 43 37 34
Highest recorded temperature
over 34 years
°F 98 62 71 71 84 96 93 98 98 98 89 71 64
Lowest recorded temperature
over 34 years
°F - 5 6 12 26 30 33 39 39 32 23 3 -
Average number of rainy days
over 34 years
days 157 19 17 17 14 11 8 5 6 8 13 19 20
Average precipitation
over 34 years
in 40.2 5.8 4.4 4.0 3.0 1.9 1.7 0.8 1.3 1.8 3.1 6.0 5.9
Average dew point
over 10 years
°F 42 35 36 37 39 43 46 50 51 48 44 39 33
Average number of days above 70°F
over 12 years
days 34 - 1 2 6 12 21 22 12 2 - - 78
Average number of days with thunderstorms
over 34 years
days 11 1 1 1 1 1 1 1 1 1 1 1 -
Average number of days with fog
over 34 years
days 156 19 17 14 9 6 6 6 9 14 18 18 20
Average morning relative humidity
over 10 years
% 85 87 89.1 89.7 85.3 80.2 78.2 78.6 80.8 86.2 90 88.8 86.1
Average evening relative humidity
over 10 years
% 64 76.4 72.9 66.5 59.9 57.5 55.1 52.6 52.2 55.8 66.8 76.1 77
Average wind speed
over 12 years
mph 11.0 4.0 3.0 4.0 4.0 3.0 3.0 3.0 3.0 3.0 4.0 3.0 4.0
Average snowfall
over 33 years
in 9.3 3.6 1.4 1.2 - - - - - - - 0.9 2.0
Most rain reported in a day
over 34 years
in 3.7 3.7 2.1 2.2 3.0 1.3 1.6 1.3 1.6 1.6 2.7 3.2 2.3
Most rain reported in a month
over 34 years
in 51.9 11.5 9.9 7.6 7.0 4.3 4.3 3.1 5.0 6.5 7.3 12.1 10.7
Least rain reported in a month
over 34 years
in 26.3 0.3 1.4 0.4 0.4 0.4 0.1 - - - 0.4 1.1 1.8
Heating degree days
over 32 years
days 5155 781 631 620 488 343 174 77 65 168 411 614 783
Cooling degree days
over 32 years
days 118 - - - - 3 13 43 49 10 - - -
Most snow reported in a month
over 33 years
in 29.2 28.7 12.2 11.9 - - - - - - - 8.1 14.0
Average possibility of clouds
over 10 years
% 66.8 82.1 77 72.8 70.1 69.7 63.4 50.2 46 48.3 65.6 79.2 77.7
Average number of snowy days
over 33 years
days 7 2 1 1 - - - - - - - 1 2
Average number of days below 33°F
over 34 years
days 59 14 10 9 4 1 - - - - 2 7 12
Average number of days below 20°F
over 34 years
days 5 2 1 - - - - - - - - 1 1
Most snow reported in a day
over 33 years
in 35.3 5.8 7.6 - - - - - - - 5.2 8.0 8.7
Deepest snow cover reported
over 33 years
in 18.0 18.0 6.0 6.0 - - - - - - - 9.0 9.0
Average wet bulb point
over 10 years
°F 46 37 39 42 44 48 53 55 57 53 46 41 36