Fossil Oregon Climate Data

Monthly Average Climate Data for Fossil Oregon

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-2.9 °C6.2 °C35.31 mm
February-2.6 °C8.1 °C28.19 mm
March-0.7 °C11.8 °C36.07 mm
April1.1 °C14.7 °C33.53 mm
May4.3 °C19.6 °C37.59 mm
June7.1 °C23.5 °C34.29 mm
July9.8 °C29.9 °C10.67 mm
August9.3 °C29.5 °C9.14 mm
September6.1 °C24.8 °C11.94 mm
October2.4 °C17.5 °C32.26 mm
November-0.8 °C10.1 °C37.85 mm
December-3.3 °C5.4 °C35.31 mm
Annual2.5 °C16.8 °C342.15 mm

Climate Data for Fossil Oregon

Average First Frost DateSep.1 - Sep. 10
Average Last Frost DateJun. 11 - Jun. 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 7a : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDsb - Humid Continental Climate - Dry Cool Summer