Jefferson Oregon Climate Data

Monthly Average Climate Data for Jefferson Oregon

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January1.8 °C8.6 °C154.43 mm
February1.8 °C10.8 °C120.65 mm
March3.1 °C13.4 °C127.76 mm
April4.7 °C16.3 °C95 mm
May7.6 °C20 °C66.29 mm
June9.8 °C23 °C41.91 mm
July11.8 °C27.8 °C9.4 mm
August11.6 °C28.1 °C11.43 mm
September9.5 °C24.9 °C40.39 mm
October6.2 °C18.1 °C95.5 mm
November3.6 °C11.7 °C159.77 mm
December1.6 °C8.1 °C186.18 mm
Annual6.1 °C17.6 °C1108.71 mm

Climate Data for Jefferson 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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