Lake Oswego, OR Weather & Growing Conditions
Overnight
59°F
Areas Of Smoke
Areas of smoke. Clear, with a low around 59. North wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Areas Of Smoke | 6 mph N | 0% |
| Tuesday | 96°F | Areas Of Smoke | 8 mph NNE | 0% |
| Tuesday Night | 63°F | Smoke | 3 to 7 mph N | 0% |
| Wednesday | 99°F | Areas Of Smoke | 5 mph N | 0% |
| Wednesday Night | 65°F | Clear | 0 to 5 mph NNW | 0% |
| Thursday | 98°F | Sunny | 0 to 3 mph NNW | 0% |
| Thursday Night | 63°F | Clear | 0 to 5 mph NNW | 0% |
| Friday | 93°F | Sunny | 0 to 7 mph NNW | 0% |
| Friday Night | 61°F | Clear | 2 to 7 mph NNW | 0% |
| Saturday | 88°F | Sunny | 2 to 9 mph NNW | 0% |
| Saturday Night | 57°F | Mostly Clear | 2 to 9 mph NNW | 0% |
| Sunday | 82°F | Sunny | 2 to 8 mph NNW | 0% |
| Sunday Night | 55°F | Mostly Clear | 1 to 8 mph NNW | 0% |
| Monday | 82°F | Sunny | 1 to 7 mph N | 0% |
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 Aug 4, 2026.