Harrisburg, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrisburg, a city in Linn County, Oregon.
Tonight
35°F
Mostly Clear then Patchy Frost
Patchy frost after 3am. Mostly clear, with a low around 35. South wind around 3 mph.
7-day forecast for Harrisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 35°F | Mostly Clear then Patchy Frost | 3 mph S | 1% |
| Wednesday | 60°F | Patchy Frost then Light Rain | 2 to 6 mph S | 81% |
| Wednesday Night | 43°F | Light Rain Likely then Mostly Cloudy | 3 to 10 mph S | 70% |
| Thursday | 60°F | Mostly Sunny | 0 to 3 mph SSW | 8% |
| Thursday Night | 38°F | Patchy Fog then Mostly Cloudy | 0 to 5 mph E | 5% |
| Friday | 61°F | Mostly Cloudy | 0 to 6 mph S | 9% |
| Friday Night | 40°F | Partly Cloudy | 0 to 3 mph SSE | 6% |
| Saturday | 64°F | Partly Sunny then Slight Chance Light Rain | 3 mph S | 15% |
| Saturday Night | 45°F | Light Rain Likely | 2 to 14 mph S | 69% |
| Sunday | 57°F | Chance Light Rain | 0 to 10 mph SSW | 50% |
| Sunday Night | 40°F | Slight Chance Light Rain | 2 mph NNE | 15% |
| Monday | 58°F | Slight Chance Light Rain | 3 mph SSE | 24% |
| Monday Night | 41°F | Chance Light Rain | 1 to 8 mph S | 30% |
| Tuesday | 59°F | Chance Light Rain | 2 to 7 mph S | 34% |
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 Nov 4, 2026.