ZIP Code 97203 Hardiness Zones and Climate Data

ZIP Code 97203 - Portland Oregon is in 2023 USDA Hardiness Zones 8b (15°F to 20°F) and 9a (20°F to 25°F)

Additional Gardening Related Climate Data for ZIP Code 97203 - Portland, Oregon

2023 Hardiness Zone:Zone 8b: 15°F to 20°F
Zone 9a: 20°F to 25°F
2012 Hardiness Zone:Zone 8b: 15°F to 20°F
1990 Hardiness Zone:Zone 8b: 15F to 20F
Average First Frost Date:Nov. 11 - Nov. 20
Average Last Frost Date:Mar. 21 - Mar. 31
Koppen-Geiger Climate Zone:Csb - Warm-Summer Mediterranean Climate
Ecoregion:3a - Portland/Vancouver Basin
Heat Zone Days: Rare Over 86°F

Annual Climate Data for ZIP Code 97203 - Portland, OR

JanFebMarAprMayJunJulAugSepOctNovDecAnnual
Avg Min Temp (°F)35373942475255565245403544
Avg Max Temp (°F)46505660677279807564524662
Avg Precip (In.)6.415.024.633.032.371.67.56.861.713.616.347.2143.42

Source Data:

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