Ione Washington Climate Data

Monthly Average Climate Data for Ione Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January21.8 °F32.7 °F2.8 in.
February22.7 °F39.4 °F1.84 in.
March27.2 °F48.2 °F2.32 in.
April32.6 °F57.8 °F1.95 in.
May40.5 °F67.7 °F2.49 in.
June46.3 °F73.4 °F2.89 in.
July50.5 °F83.8 °F1.25 in.
August49.6 °F84.4 °F0.8 in.
September42.5 °F73.7 °F1.13 in.
October34.5 °F56.7 °F2.15 in.
November27.9 °F40.9 °F3.13 in.
December21.7 °F32.5 °F3.15 in.
Annual34.8 °F57.6 °F25.9 in.

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 : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year