Monmouth Oregon Climate Data

Monthly Average Climate Data for Monmouth Oregon

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January1.8 °C8.4 °C165.1 mm
February1.9 °C10.6 °C122.43 mm
March3.1 °C13.2 °C117.09 mm
April4.7 °C15.9 °C88.9 mm
May7.4 °C19.9 °C59.94 mm
June9.7 °C22.9 °C36.32 mm
July11.6 °C27.9 °C6.1 mm
August11.5 °C28.3 °C9.4 mm
September9.6 °C25.1 °C34.8 mm
October6.3 °C18.1 °C89.92 mm
November3.7 °C11.6 °C158.75 mm
December1.6 °C7.9 °C197.61 mm
Annual6.1 °C17.5 °C1086.36 mm

Climate Data for Monmouth Oregon

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
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 ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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