Lake Oswego, OR Weather & Growing Conditions
Tonight
53°F
Partly Cloudy then Patchy Fog
Patchy fog after 5am. Partly cloudy, with a low around 53. North wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Partly Cloudy then Patchy Fog | 1 mph N | 0% |
| Saturday | 79°F | Patchy Fog then Mostly Sunny | 3 mph N | 0% |
| Saturday Night | 54°F | Partly Cloudy | 3 mph N | 0% |
| Sunday | 83°F | Patchy Fog then Sunny | 3 mph N | 0% |
| Sunday Night | 54°F | Mostly Clear | 0 to 3 mph NNW | 0% |
| Monday | 77°F | Mostly Sunny | 0 to 5 mph NNW | 0% |
| Monday Night | 54°F | Partly Cloudy | 1 to 5 mph NNW | 0% |
| Tuesday | 74°F | Patchy Fog then Mostly Sunny | 3 mph NNW | 1% |
| Tuesday Night | 51°F | Partly Cloudy | 3 mph NNW | 1% |
| Wednesday | 73°F | Mostly Sunny | 2 mph N | 0% |
| Wednesday Night | 53°F | Partly Cloudy | 2 mph N | 1% |
| Thursday | 76°F | Mostly Sunny | 2 mph N | 7% |
| Thursday Night | 54°F | Slight Chance Light Rain | 2 mph WNW | 22% |
| Friday | 70°F | Slight Chance Light Rain then Mostly Sunny | 5 mph W | 16% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lake Oswego, OR
Last spring frost
Mar 18
First fall frost
Nov 18
Growing season
244 days
Hardiness zone
9a
Explore more for Lake Oswego, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Oregon City, Or (5.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.