Vernonia Oregon Climate Data

Monthly Average Climate Data for Vernonia Oregon

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-0.2 °C7.7 °C186.69 mm
February-0.3 °C9.7 °C136.91 mm
March1.1 °C12.2 °C136.91 mm
April2.7 °C14.7 °C100.33 mm
May5.7 °C18.6 °C62.48 mm
June8.1 °C21.3 °C38.35 mm
July10.2 °C25.3 °C10.41 mm
August10.1 °C25.9 °C14.73 mm
September7.6 °C23 °C42.67 mm
October4.2 °C16.7 °C106.93 mm
November1.7 °C10.7 °C192.28 mm
December-0.3 °C7.1 °C213.87 mm
Annual4.2 °C16.1 °C1242.56 mm

Climate Data for Vernonia Oregon

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 8a : -12.2°C to -9.4°C
Plant Hardiness Zone - 2012Zone 8a : -12.2°C to -9.4°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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