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Lake Oswego, OR weather and climate

Clackamas County, OR · population 40,367 · about 157 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Lake Oswego's own coordinates.

The year at a glance

Sunny days
160
clear or partly cloudy, per year
Precipitation
48 in
per year
Wet days
143
rain or snow per year
Snowfall
6 in
per year
Hot days
16
above 90 °F
Freezing nights
30
at or below 32 °F
Humidity
75%
average relative
Average temperature
55 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 48 °FDaily high, Feb: 52 °FDaily high, Mar: 57 °FDaily high, Apr: 63 °FDaily high, May: 70 °FDaily high, Jun: 75 °FDaily high, Jul: 82 °FDaily high, Aug: 83 °FDaily high, Sep: 77 °FDaily high, Oct: 64 °FDaily high, Nov: 53 °FDaily high, Dec: 47 °FDaily low, Jan: 36 °FDaily low, Feb: 37 °FDaily low, Mar: 39 °FDaily low, Apr: 42 °FDaily low, May: 48 °FDaily low, Jun: 52 °FDaily low, Jul: 56 °FDaily low, Aug: 56 °FDaily low, Sep: 52 °FDaily low, Oct: 46 °FDaily low, Nov: 40 °FDaily low, Dec: 36 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high485257637075828377645347
Daily low363739424852565652464036

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.55.07.5JanMarMayJulSepNovLake Oswego, Jan: 6.6 inLake Oswego, Feb: 5.1 inLake Oswego, Mar: 5.7 inLake Oswego, Apr: 4.5 inLake Oswego, May: 2.8 inLake Oswego, Jun: 1.7 inLake Oswego, Jul: 0.5 inLake Oswego, Aug: 0.6 inLake Oswego, Sep: 1.6 inLake Oswego, Oct: 4.2 inLake Oswego, Nov: 6.9 inLake Oswego, Dec: 7.6 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Lake Oswego6.65.15.74.52.81.70.50.61.64.26.97.6

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovLake Oswego, Jan: 7 daysLake Oswego, Feb: 8 daysLake Oswego, Mar: 8 daysLake Oswego, Apr: 9 daysLake Oswego, May: 13 daysLake Oswego, Jun: 15 daysLake Oswego, Jul: 24 daysLake Oswego, Aug: 25 daysLake Oswego, Sep: 21 daysLake Oswego, Oct: 15 daysLake Oswego, Nov: 8 daysLake Oswego, Dec: 7 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Lake Oswego788913152425211587

Compare Lake Oswego with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Oregon city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).