Hillsboro Oregon Climate Data

Monthly Average Climate Data for Hillsboro Oregon

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January35.4 °F47.0 °F6.08 in.
February35.5 °F50.9 °F4.24 in.
March37.9 °F55.8 °F4.1 in.
April41.0 °F61.0 °F2.89 in.
May46.6 °F68.3 °F2.13 in.
June50.8 °F73.4 °F1.41 in.
July54.8 °F81.3 °F0.34 in.
August54.7 °F82.1 °F0.53 in.
September50.3 °F76.2 °F1.28 in.
October43.9 °F63.9 °F3.32 in.
November38.7 °F52.6 °F5.99 in.
December34.9 °F46.1 °F7.45 in.
Annual43.7 °F63.2 °F39.76 in.

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