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Mountlake Terrace, WA Weather


Mountlake Terrace, WA climate is mild during summer when temperatures tend to be in the 60's and cold during winter when temperatures tend to be in the 40's.

The warmest month of the year is August with an average maximum temperature of 9.99 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 9.99 degrees Fahrenheit.

Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 19 degrees Fahrenheit, and fairly limited during winter with an average difference of 12 degrees Fahrenheit.

The annual average precipitation at Mountlake Terrace is 9.99 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is December with an average rainfall of 5.45 Inches.

Weather Data

Normal Climate

Normal Temperatures

(SEATTLE SAND PT WSFO Weather station, 7.95 miles from Mountlake Terrace)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Max °F 46.4 49.7 53.6 58.3 64.5 69.4 75.0 75.8 70.5 60.2 51.5 46.0 60.1
Mean °F 40.8 43.0 45.9 50.1 55.9 60.6 65.2 66.2 61.5 53.3 45.9 40.7 52.4
Min °F 35.2 36.2 38.1 41.8 47.3 51.7 55.4 56.5 52.4 46.3 40.2 35.4 44.7

Normal Precipitation

(SEATTLE SAND PT WSFO Weather station, 7.95 miles from Mountlake Terrace)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Inch 4.49 3.67 3.84 2.84 2.10 1.68 0.97 0.97 1.71 3.32 4.92 5.45 9.99