Lake Oswego, OR Weather & Growing Conditions
Overnight
59°F
Areas Of Smoke
Areas of smoke. Clear. Low around 59, with temperatures rising to around 61 overnight. North wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Areas Of Smoke | 5 mph N | 0% |
| Tuesday | 96°F | Areas Of Smoke | 8 mph NNE | 0% |
| Tuesday Night | 63°F | Smoke | 2 to 8 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 | 99°F | Sunny | 0 to 3 mph NNW | 0% |
| Thursday Night | 63°F | Clear | 0 to 5 mph NNW | 0% |
| Friday | 94°F | Sunny | 0 to 7 mph N | 0% |
| Friday Night | 61°F | Clear | 2 to 7 mph NNW | 0% |
| Saturday | 88°F | Sunny | 2 to 9 mph NNW | 0% |
| Saturday Night | 58°F | Mostly Clear | 1 to 9 mph NNW | 0% |
| Sunday | 83°F | Sunny | 1 to 8 mph NNW | 0% |
| Sunday Night | 56°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
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 Aug 4, 2026.