Harrisburg, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrisburg, a city in Linn County, Oregon.
Overnight
48°F
Patchy Fog
Patchy fog. Mostly cloudy, with a low around 48. North wind around 1 mph.
7-day forecast for Harrisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Patchy Fog | 1 mph N | 0% |
| Saturday | 77°F | Areas Of Fog then Mostly Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 49°F | Partly Cloudy then Patchy Fog | 0 to 5 mph NNE | 0% |
| Sunday | 79°F | Areas Of Fog then Sunny | 0 to 7 mph N | 0% |
| Sunday Night | 49°F | Mostly Clear then Patchy Fog | 1 to 7 mph WNW | 0% |
| Monday | 76°F | Patchy Fog then Mostly Sunny | 1 to 8 mph NW | 0% |
| Monday Night | 49°F | Mostly Clear | 2 to 8 mph N | 0% |
| Tuesday | 74°F | Mostly Sunny | 2 to 6 mph N | 0% |
| Tuesday Night | 46°F | Partly Cloudy then Patchy Fog | 1 to 6 mph NNW | 0% |
| Wednesday | 72°F | Patchy Fog then Mostly Sunny | 1 to 5 mph N | 1% |
| Wednesday Night | 47°F | Partly Cloudy | 5 mph N | 1% |
| Thursday | 71°F | Mostly Sunny | 3 to 7 mph N | 7% |
| Thursday Night | 47°F | Mostly Cloudy | 7 mph N | 9% |
| Friday | 68°F | Mostly Sunny | 5 to 9 mph N | 9% |
Forecast source: National Weather Service (api.weather.gov) for Harrisburg (44.270, -123.163). Updated through the day.
Growing snapshot for Harrisburg
Last spring frost
Apr 11
First fall frost
Oct 23
Growing season
196 days
Hardiness zone
8b
More local growing data for Harrisburg: nearby ZIP 97446 weather · frost dates · planting calendar · Oregon frost dates
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Climate data from the nearest NOAA station, Eugene Mahlon Sweet Ap, Or (12.3 mi from Harrisburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.