Sumpter Oregon Climate Data

Monthly Average Climate Data for Sumpter Oregon

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.9 °C1.7 °C66.8 mm
February-7.7 °C4.4 °C44.45 mm
March-4.9 °C8.3 °C48.77 mm
April-2.3 °C11.8 °C40.89 mm
May1.3 °C16.9 °C51.31 mm
June4.1 °C21.2 °C36.07 mm
July7.2 °C27.8 °C14.73 mm
August6.7 °C27.9 °C14.99 mm
September3 °C22.8 °C16 mm
October-1.2 °C14.7 °C30.99 mm
November-4.8 °C6.2 °C54.36 mm
December-8.7 °C1.1 °C73.91 mm
Annual-1.4 °C13.7 °C493.27 mm

Climate Data for Sumpter Oregon

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 11 - Jun. 20
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate