Lake Oswego, OR Weather & Growing Conditions
Overnight
53°F
Patchy Fog
Patchy fog after 5am. Partly cloudy, with a low around 53. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Patchy Fog | 0 mph | 0% |
| Saturday | 79°F | Patchy Fog then Mostly Sunny | 2 mph N | 0% |
| Saturday Night | 54°F | Mostly Clear | 2 mph N | 0% |
| Sunday | 83°F | Sunny | 1 to 5 mph N | 0% |
| Sunday Night | 55°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Monday | 77°F | Mostly Sunny | 0 to 5 mph NNW | 0% |
| Monday Night | 54°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Tuesday | 74°F | Mostly Sunny | 0 to 3 mph N | 0% |
| Tuesday Night | 52°F | Partly Cloudy | 0 to 3 mph NNW | 0% |
| Wednesday | 72°F | Patchy Fog then Partly Sunny | 2 mph N | 0% |
| Wednesday Night | 53°F | Mostly Cloudy | 2 mph N | 1% |
| Thursday | 71°F | Partly Sunny | 1 to 5 mph N | 11% |
| Thursday Night | 52°F | Mostly Cloudy | 1 to 5 mph NNW | 11% |
| Friday | 69°F | Partly Sunny | 1 to 6 mph NNW | 10% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lake Oswego, OR
Last spring frost
Apr 1
First fall frost
Nov 6
Growing season
222 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, Beaverton 2 Ssw, Or (5.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.