Johnson City, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Johnson City, a city in Clackamas County, Oregon.
This Afternoon
61°F
Mostly Cloudy
Mostly cloudy. High near 61, with temperatures falling to around 56 in the afternoon. Northeast wind around 3 mph.
7-day forecast for Johnson City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 61°F | Mostly Cloudy | 3 mph NE | 6% |
| Tonight | 40°F | Areas Of Fog | 1 mph E | 5% |
| Wednesday | 59°F | Patchy Fog then Chance Light Rain | 2 mph SSE | 47% |
| Wednesday Night | 49°F | Light Rain | 2 to 8 mph S | 96% |
| Thursday | 60°F | Chance Light Rain then Partly Sunny | 3 mph SSW | 28% |
| Thursday Night | 47°F | Mostly Cloudy then Chance Light Rain | 1 mph SE | 45% |
| Friday | 59°F | Chance Light Rain | 2 mph SSE | 47% |
| Friday Night | 48°F | Slight Chance Light Rain | 1 mph SSE | 18% |
| Saturday | 65°F | Partly Sunny then Slight Chance Light Rain | 2 mph SSE | 15% |
| Saturday Night | 51°F | Light Rain Likely | 2 to 9 mph S | 72% |
| Sunday | 60°F | Light Rain Likely | 2 to 7 mph SSW | 72% |
| Sunday Night | 46°F | Patchy Fog | 2 mph E | 17% |
| Monday | 59°F | Patchy Fog then Chance Light Rain | 2 mph SE | 43% |
| Monday Night | 48°F | Chance Light Rain | 3 mph SSE | 48% |
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
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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 Nov 4, 2026.