Newcastle Washington Climate Data

Monthly Average Climate Data for Newcastle Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January1.8 °C7.7 °C170.18 mm
February1.8 °C9.3 °C117.35 mm
March2.9 °C11.4 °C130.05 mm
April4.8 °C14.7 °C106.17 mm
May7.9 °C18.8 °C67.31 mm
June10.2 °C21.1 °C59.18 mm
July12.3 °C24.7 °C22.61 mm
August12.5 °C25.1 °C32 mm
September10.3 °C21.7 °C49.78 mm
October6.8 °C15.6 °C124.21 mm
November3.7 °C10.3 °C182.37 mm
December1.6 °C7.1 °C169.67 mm
Annual6.4 °C15.6 °C1230.88 mm

Climate Data for Newcastle 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 8b : -9.4°C to -6.7°C
Plant Hardiness Zone - 2012Zone 8b : -9.4°C to -6.7°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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