Hillsboro Oregon Climate Data

Monthly Average Climate Data for Hillsboro Oregon

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January1.9 °C8.3 °C154.43 mm
February1.9 °C10.5 °C107.7 mm
March3.3 °C13.2 °C104.14 mm
April5 °C16.1 °C73.41 mm
May8.1 °C20.2 °C54.1 mm
June10.4 °C23 °C35.81 mm
July12.7 °C27.4 °C8.64 mm
August12.6 °C27.8 °C13.46 mm
September10.2 °C24.6 °C32.51 mm
October6.6 °C17.7 °C84.33 mm
November3.7 °C11.4 °C152.15 mm
December1.6 °C7.8 °C189.23 mm
Annual6.5 °C17.3 °C1009.91 mm

Climate Data for Hillsboro Oregon

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost50-75 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 ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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