Zipcode 80303 - Boulder Colorado is in Hardiness Zones 5b and 6a

Zip Code 80303 Border
Zone 5b
-15°F to -10°F
Zone 6a
-10°F to -5°F
View the Full Colorado Hardiness Zone Map

Additional Gardening Related Data for Zipcode 80303 - Boulder, Colorado

1990 Hardiness Zone:Zone 5a: -20F to -15FColorado 1990 USDA Hardiness Zone Map
Average First Frost:October 1 - 10Colorado First Frost Date Map
Average Last Frost:May 1 - 10Colorado Last Frost Date Map
Koppen-Geiger Climate Zone:Cfa - Humid Subtropical Climate
Ecoregion:25l - Front Range FansColorado Ecoregions
Palmer Drought Index: Colorado Drought Index Map
Heat Zone Days: 15 - 30 days Over 86°FColorado Heat Zones Map

Annual Climate Data for Zipcode 80303 - Boulder, CO

JanFebMarAprMayJunJulAugSepOctNovDecAnnual
Avg Min Temp (°F)18212633414955534535251935
Avg Max Temp (°F)44485462718187847766524564
Avg Precip (In.).64.681.692.72.941.991.811.621.611.221.34.7318.95

Related Maps

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

Source Data:

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