Ione Washington Climate Data

Monthly Average Climate Data for Ione Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-5.7 °C0.4 °C71.12 mm
February-5.2 °C4.1 °C46.74 mm
March-2.7 °C9 °C58.93 mm
April0.3 °C14.3 °C49.53 mm
May4.7 °C19.8 °C63.25 mm
June7.9 °C23 °C73.41 mm
July10.3 °C28.8 °C31.75 mm
August9.8 °C29.1 °C20.32 mm
September5.8 °C23.2 °C28.7 mm
October1.4 °C13.7 °C54.61 mm
November-2.3 °C4.9 °C79.5 mm
December-5.7 °C0.3 °C80.01 mm
Annual1.6 °C14.2 °C657.87 mm

Climate Data for Ione Washington

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year