Zipcode 99362 - Walla Walla Washington is in Hardiness Zones 6b and 7a

Zip Code 99362 Border
Zone 6b
-5°F to 0°F
Zone 7a
0°F to 5°F
View the Full Washington Hardiness Zone Map

Additional Gardening Related Data for Zipcode 99362 - Walla Walla, Washington

1990 Hardiness Zone:Zone 6b: -5F to 0FWashington 1990 USDA Hardiness Zone Map
Average First Frost:October 21 - 31Washington First Frost Date Map
Average Last Frost:March 21 - 31Washington Last Frost Date Map
Koppen-Geiger Climate Zone:Csa - Hot-Summer Mediterranean Climate
Ecoregion:10e - Pleistocene Lake BasinsWashington Ecoregions
Palmer Drought Index: Extremely MoistWashington Drought Index Map
Heat Zone Days: 31 - 45 days Over 86°FWashington Heat Zones Map

Annual Climate Data for Zipcode 99362 - Walla Walla, WA

JanFebMarAprMayJunJulAugSepOctNovDecAnnual
Avg Min Temp (°F)28323641475460605142352943
Avg Max Temp (°F)41475664728089887965504164
Avg Precip (In.)1.981.721.921.581.741.14.56.72.791.552.442.1318.28

Related Maps

  • Washington 2012 USDA Hardiness Zone Map
  • Washington 1990 USDA Hardiness Zone Map
  • Washington First Frost Date Map
  • Washington Last Frost Date Map
  • Map of Washington Record High/Low Temperatures
  • Washington Interactive Drought Monitor Map
  • Washington Drought Index Map
  • Washington Ecoregions
  • Washington Heat Zones Map

Source Data:

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