Johnson City, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Johnson City, a city in Clackamas County, Oregon.
Overnight
53°F
Patchy Fog
Patchy fog after 5am. Partly cloudy, with a low around 53. North wind around 1 mph.
7-day forecast for Johnson City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Patchy Fog | 1 mph N | 0% |
| Saturday | 80°F | Patchy Fog then Mostly Sunny | 1 to 5 mph N | 0% |
| Saturday Night | 54°F | Mostly Clear | 2 mph N | 0% |
| Sunday | 84°F | Sunny | 1 to 5 mph N | 0% |
| Sunday Night | 55°F | Mostly Clear | 1 to 5 mph NNW | 0% |
| Monday | 78°F | Mostly Sunny | 1 to 6 mph NNW | 0% |
| Monday Night | 55°F | Partly Cloudy | 1 to 6 mph NNW | 0% |
| Tuesday | 75°F | Mostly Sunny | 1 to 5 mph N | 0% |
| Tuesday Night | 52°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Wednesday | 73°F | Patchy Fog then Partly Sunny | 3 mph N | 1% |
| Wednesday Night | 53°F | Mostly Cloudy | 3 mph N | 1% |
| Thursday | 72°F | Partly Sunny | 1 to 6 mph N | 11% |
| Thursday Night | 52°F | Mostly Cloudy | 2 to 6 mph NNW | 11% |
| Friday | 70°F | Partly Sunny | 2 to 7 mph NNW | 10% |
Forecast source: National Weather Service (api.weather.gov) for Johnson City (45.404, -122.578). Updated through the day.
Growing snapshot for Johnson City
Last spring frost
Mar 18
First fall frost
Nov 18
Growing season
244 days
Hardiness zone
9a
More local growing data for Johnson City: nearby ZIP 97027 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
Barlow
Beavercreek
Boring
Canby
Damascus
Dunthorpe
Estacada
Gladstone
Government Camp
Happy Valley
Jennings Lodge
Lake Oswego
Milwaukie
Molalla
Mount Hood Villages
Mulino
Oak Grove
Oatfield
Oregon City
Rhododendron
Rivergrove
Sandy
Stafford
West Linn
Wilsonville
Climate data from the nearest NOAA station, Oregon City, Or (2.1 mi from Johnson City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.