Vernonia Oregon Climate Data

Monthly Average Climate Data for Vernonia Oregon

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January31.7 °F45.8 °F7.35 in.
February31.4 °F49.5 °F5.39 in.
March34.0 °F53.9 °F5.39 in.
April36.8 °F58.4 °F3.95 in.
May42.2 °F65.4 °F2.46 in.
June46.5 °F70.3 °F1.51 in.
July50.3 °F77.6 °F0.41 in.
August50.1 °F78.7 °F0.58 in.
September45.6 °F73.4 °F1.68 in.
October39.6 °F62.0 °F4.21 in.
November35.0 °F51.3 °F7.57 in.
December31.5 °F44.7 °F8.42 in.
Annual39.6 °F60.9 °F48.92 in.

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 : 10°F to 15°F
Plant Hardiness Zone - 2012Zone 8a : 10°F to 15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate