| Sun May 19 | Mon May 20 | Tue May 21 | Wed May 22 | |
| Tmin 18-06 |
12°C | 8°C | 8°C | 6°C |
| Tmax 06-18 |
20°C | 23°C | 15°C | 11°C |
| morning 24-06 |
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| a.m. 06-12 |
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| p.m. 12-18 |
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| evening 18-24 |
| Nearby Forecast Locations - Lake Oswego | Distance |
| Milwaukie | 5.4 km |
| West Linn | 5.4 km |
| Tigard | 6.8 km |
| Tualatin | 7.5 km |
| Gladstone | 8.0 km |
| Beaverton | 9.6 km |
| Wilsonville | 12.3 km |
| Oregon | 12.8 km |
| Sherwood | 13.0 km |
| Clackamas | 13.0 km |
| Aurora | 17.9 km |
| Canby | 18.6 km |
| Hillsboro | 22.5 km |
| Gresham | 22.8 km |
| Portland | 23.2 km |
| Vancouver | 24.3 km |
| Fairview | 24.5 km |
| Newberg | 24.8 km |
| Boring | 24.8 km |
| Hillsboro | 25.6 km |
| Troutdale | 27.7 km |
| Forecast: Lake Oswego Region Before it becomes mostly cloudy, it will be mainly fine on Monday. But on Tuesday and Wednesday rain is to expected. The daily high falls from 23 degrees on Monday to 11 degrees on Wednesday. |