Historical Weather in Oregon
See 55+ years of weather history for any date in Oregon going back to 1970.
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Monthly Climate Averages
Historical temperature and precipitation averages for Portland, OR, based on 55+ years of weather data.
Warmest MonthAugustAvg High: 81°F / Low: 58°F
Coldest MonthDecemberAvg High: 46°F / Low: 36°F
Jan
47°/ 36°
💧 0.3"
❄️ 1.6"
Feb
50°/ 37°
💧 0.3"
❄️ 2.1"
Mar
56°/ 40°
💧 0.2"
❄️ 1.3"
Apr
61°/ 43°
💧 0.2"
❄️ 2.0"
May
68°/ 49°
💧 0.2"
Jun
74°/ 53°
💧 0.2"
Jul
81°/ 58°
💧 0.1"
Aug
81°/ 58°
💧 0.2"
Sep
75°/ 54°
💧 0.2"
Oct
63°/ 47°
💧 0.3"
Nov
53°/ 41°
💧 0.3"
❄️ 2.1"
Dec
46°/ 36°
💧 0.3"
❄️ 1.3"
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
Climate data based on Portland, the largest city in Oregon.
Oregon All-Time Temperature RecordsSee the hottest and coldest days ever recorded since 1970
→Oregon All-Time Weather ExtremesRain, snow, and temperature extremes for any Oregon city or ZIP code
→Today's Weather History in Oregon
See how today compares to 55+ years of weather data for Oregon cities.