Newcastle Washington Climate Data

Monthly Average Climate Data for Newcastle Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January35.3 °F45.9 °F6.7 in.
February35.2 °F48.7 °F4.62 in.
March37.3 °F52.6 °F5.12 in.
April40.6 °F58.4 °F4.18 in.
May46.2 °F65.9 °F2.65 in.
June50.4 °F69.9 °F2.33 in.
July54.2 °F76.5 °F0.89 in.
August54.5 °F77.1 °F1.26 in.
September50.6 °F71.0 °F1.96 in.
October44.2 °F60.0 °F4.89 in.
November38.6 °F50.5 °F7.18 in.
December34.8 °F44.8 °F6.68 in.
Annual43.5 °F60.1 °F48.46 in.

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 : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8b : 15°F to 20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate