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Lake Oswego weather

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Lake Oswego weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Lake Oswego weather in numbers

from 30 years of measured normals

Lake Oswego swings 51°F across the year, from 86°F highs in July to 35°F lows in January, and December is usually the wettest month in a year that brings about 57 in of precipitation.

Warmest month
July
86°F average high
Coldest month
January
35°F average low
Wettest month
December
57 in a year
Below freezing
Never
overnight lows stay above 32°F
Comfortable
4 months
May, June, September and October
Residents
38,000
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The weather map: all three models at once

NWS, American, European side by side around Lake Oswego and nearby towns.Live rain radar →
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Lake Oswego hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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Lake Oswego 10-day forecast, out to 14 days

where the models agree, and where they split

Lake Oswego, Oregon (OR) is at its warmest in Jul (average highs near 86°F) and coldest in Jan (lows around 35°F), with roughly 57 in of precipitation across the year. Below, compare what NWS, American, European forecast for Lake Oswego right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

Lake Oswego climate by month

average daytime high and overnight low across a typical year
Jan
47°
35°
Feb
49°
35°
Mar
52°
36°
Apr
57°
41°
May
68°
47°
Jun
75°
51°
Jul
86°
58°
Aug
85°
59°
Sep
75°
54°
Oct
64°
47°
Nov
52°
40°
Dec
50°
39°

Which forecast is most accurate in Lake Oswego?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
94
/100rank #1
92±0.8°F95±1.5 mph9597% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
79
/100rank #2
72±2.8°F94±1.9 mph7687% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Common questions

What's the weather in Lake Oswego today?
On this page we show what NWS, American, European each forecast for Lake Oswego today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Lake Oswego today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Lake Oswego and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Lake Oswego?
Over the last 30 days, the European model has been the most accurate for Lake Oswego (CheckWeather Score 94/100), ahead of the American at 79. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Lake Oswego?
July is typically the warmest month in Lake Oswego, with average highs around 86°F.
How cold does Lake Oswego get?
The coldest month in Lake Oswego is January, when overnight lows average about 35°F.
How much rain does Lake Oswego get?
Lake Oswego sees roughly 57 in of precipitation a year, with December usually the wettest month.

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