Fossil Oregon Climate Data

Monthly Average Climate Data for Fossil Oregon

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January26.7 °F43.2 °F1.39 in.
February27.4 °F46.6 °F1.11 in.
March30.7 °F53.2 °F1.42 in.
April33.9 °F58.5 °F1.32 in.
May39.7 °F67.3 °F1.48 in.
June44.8 °F74.3 °F1.35 in.
July49.6 °F85.9 °F0.42 in.
August48.8 °F85.1 °F0.36 in.
September42.9 °F76.6 °F0.47 in.
October36.3 °F63.5 °F1.27 in.
November30.5 °F50.1 °F1.49 in.
December26.1 °F41.7 °F1.39 in.
Annual36.5 °F62.2 °F13.47 in.

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 : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDsb - Humid Continental Climate - Dry Cool Summer