Harrisburg, OR Weather & Growing Conditions
Overnight
35°F
Patchy Frost
Patchy frost after 4am. Partly cloudy. Low around 35, with temperatures rising to around 37 overnight. South southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 35°F | Patchy Frost | 3 mph SSE | 0% |
| Wednesday | 59°F | Patchy Frost then Light Rain | 2 to 6 mph S | 83% |
| Wednesday Night | 44°F | Light Rain Likely | 3 to 10 mph S | 74% |
| Thursday | 60°F | Mostly Sunny | 0 to 3 mph S | 9% |
| Thursday Night | 38°F | Mostly Cloudy | 0 to 5 mph ESE | 4% |
| Friday | 61°F | Cloudy | 0 to 5 mph S | 8% |
| Friday Night | 41°F | Partly Cloudy | 2 mph SSE | 6% |
| Saturday | 64°F | Partly Sunny then Slight Chance Light Rain | 3 mph S | 15% |
| Saturday Night | 45°F | Light Rain Likely | 1 to 14 mph S | 69% |
| Sunday | 57°F | Chance Light Rain | 0 to 9 mph SSW | 53% |
| Sunday Night | 40°F | Slight Chance Light Rain then Mostly Cloudy | 2 mph NE | 15% |
| Monday | 58°F | Slight Chance Light Rain | 0 to 3 mph SSE | 22% |
| Monday Night | 42°F | Chance Light Rain | 0 to 8 mph S | 29% |
| Tuesday | 59°F | Chance Light Rain | 2 to 7 mph S | 33% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harrisburg, OR
Last spring frost
Apr 11
First fall frost
Oct 23
Growing season
196 days
Hardiness zone
8b
Explore more for Harrisburg, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Eugene Mahlon Sweet Ap, Or (12.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.