Heppner, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Heppner, a city in Morrow County, Oregon.
Tonight
34°F
Mostly Clear
Mostly clear, with a low around 34. South wind around 5 mph.
7-day forecast for Heppner
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 34°F | Mostly Clear | 5 mph S | 1% |
| Wednesday | 54°F | Sunny | 2 to 6 mph W | 1% |
| Wednesday Night | 42°F | Chance Rain Showers | 2 to 9 mph SW | 50% |
| Thursday | 55°F | Mostly Sunny | 2 to 13 mph SW | 10% |
| Thursday Night | 40°F | Partly Cloudy | 2 to 12 mph S | 6% |
| Friday | 58°F | Mostly Cloudy | 2 to 12 mph S | 6% |
| Friday Night | 43°F | Mostly Cloudy | 2 to 8 mph S | 2% |
| Saturday | 62°F | Mostly Sunny | 3 to 8 mph SE | 1% |
| Saturday Night | 46°F | Mostly Cloudy then Slight Chance Rain Showers | 3 to 14 mph S | 16% |
| Sunday | 59°F | Slight Chance Rain Showers | 3 to 14 mph SW | 17% |
| Sunday Night | 42°F | Mostly Cloudy | 3 mph S | 8% |
| Monday | 56°F | Mostly Cloudy | 3 mph SW | 12% |
| Monday Night | 43°F | Mostly Cloudy | 1 to 8 mph SW | 14% |
| Tuesday | 60°F | Slight Chance Rain Showers | 3 to 12 mph S | 21% |
Forecast source: National Weather Service (api.weather.gov) for Heppner (45.353, -119.561). Updated through the day.
Growing snapshot for Heppner
Last spring frost
Apr 26
First fall frost
Oct 19
Growing season
174 days
Hardiness zone
7a
More local growing data for Heppner: nearby ZIP 97836 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Heppner, Or (5.3 mi from Heppner). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.