Index Washington Climate Data

Monthly Average Climate Data for Index Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January0.6 °C6.6 °C315.47 mm
February0.7 °C8.6 °C212.34 mm
March1.8 °C11.1 °C232.16 mm
April3.9 °C14.7 °C185.93 mm
May7.2 °C18.8 °C124.71 mm
June9.5 °C21 °C102.87 mm
July11.6 °C25 °C40.64 mm
August11.6 °C25.5 °C43.94 mm
September9.3 °C21.8 °C105.66 mm
October5.9 °C14.9 °C231.65 mm
November2.7 °C9.4 °C348.74 mm
December0.4 °C6 °C295.4 mm
Annual5.4 °C15.3 °C2239.51 mm

Climate Data for Index Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 11 - May 20
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 8b : -9.4°C to -6.7°C
Plant Hardiness Zone - 2012Zone 8a : -12.2°C to -9.4°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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