Harrisburg, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrisburg, a city in Linn County, Oregon.
Overnight
55°F
Areas Of Smoke
Areas of smoke. Clear. Low around 55, with temperatures rising to around 57 overnight. North wind around 7 mph.
7-day forecast for Harrisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Areas Of Smoke | 7 mph N | 0% |
| Tuesday | 96°F | Areas Of Smoke | 6 to 12 mph N | 0% |
| Tuesday Night | 61°F | Areas Of Smoke | 1 to 12 mph N | 0% |
| Wednesday | 98°F | Areas Of Smoke | 1 to 6 mph N | 0% |
| Wednesday Night | 58°F | Clear | 2 to 6 mph W | 0% |
| Thursday | 98°F | Sunny | 1 to 7 mph WNW | 0% |
| Thursday Night | 56°F | Clear | 2 to 7 mph WNW | 0% |
| Friday | 94°F | Sunny | 1 to 10 mph NW | 0% |
| Friday Night | 58°F | Clear | 5 to 10 mph N | 0% |
| Saturday | 90°F | Sunny | 5 to 12 mph N | 0% |
| Saturday Night | 54°F | Mostly Clear | 6 to 12 mph NNW | 0% |
| Sunday | 84°F | Sunny | 6 to 13 mph N | 0% |
| Sunday Night | 51°F | Mostly Clear | 6 to 13 mph N | 0% |
| Monday | 84°F | Sunny | 6 to 12 mph N | 0% |
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 Aug 4, 2026.