Lake Oswego, OR Weather & Climate Normals
What a normal year in Lake Oswego actually looks like
On the 30-year record NOAA keeps for Lake Oswego, OR, the comfort score comes out to 60/100, mild with real seasons: A solid stretch of comfortable months alongside a noticeable but not extreme summer or winter. Only 6 months a year land in the 55–75°F range this site treats as mild.
How much Lake Oswego's weather actually swings
Average temperatures in Lake Oswego run from 42°F in Dec up to 71°F in Aug, a 29°F seasonal swing, a middling gap by national standards.
How wet Lake Oswego actually gets
Lake Oswego averages 44.81in of precipitation a year across roughly 0 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Lake Oswego against the rest of the country
Out of 4876 cities scored here, Lake Oswego comes in at 514; within OR alone it ranks 4 of 80. Population is about 40,029.
Checking the actual forecast
These figures come from OREGON CITY, OR US, the NOAA station 6.1 miles from Lake Oswego, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is