Mountlake Terrace Washington Climate Data

Monthly Average Climate Data for Mountlake Terrace Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January36.0 °F46.3 °F5.54 in.
February36.0 °F48.7 °F3.95 in.
March38.4 °F52.7 °F4.41 in.
April41.5 °F57.3 °F3.44 in.
May46.7 °F64.2 °F2.13 in.
June50.5 °F68.1 °F2.12 in.
July54.3 °F74.3 °F0.91 in.
August54.9 °F75.0 °F1.09 in.
September51.5 °F69.0 °F1.73 in.
October45.4 °F59.2 °F4.0 in.
November39.1 °F50.6 °F6.39 in.
December35.7 °F45.5 °F5.6 in.
Annual44.2 °F59.2 °F41.31 in.

Climate Data for Mountlake Terrace Washington

Average First Frost DateNov. 11 - Nov. 20
Average Last Frost DateApr. 1 - Apr. 10
Average Days With Frost30-40 Days
Plant Hardiness Zone - 2023Zone 9a : 20°F to 25°F
Plant Hardiness Zone - 2012Zone 8b : 15°F to 20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate