Lake Oswego, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Oswego, a city in Clackamas County, Oregon.
Overnight
59°F
Areas Of Smoke
Areas of smoke. Clear, with a low around 59. North wind around 6 mph.
7-day forecast for Lake Oswego
| 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) for Lake Oswego (45.414, -122.700). Updated through the day.
Growing snapshot for Lake Oswego
Last spring frost
Mar 18
First fall frost
Nov 18
Growing season
244 days
Hardiness zone
9a
More local growing data for Lake Oswego: nearby ZIP 97034 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
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Canby
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Gladstone
Government Camp
Happy Valley
Jennings Lodge
Johnson City
Milwaukie
Molalla
Mount Hood Villages
Mulino
Oak Grove
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Oregon City
Rhododendron
Rivergrove
Sandy
Stafford
West Linn
Wilsonville
Climate data from the nearest NOAA station, Oregon City, Or (5.4 mi from Lake Oswego). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.