La Grande, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for La Grande, a city in Union County, Oregon.
Today
89°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 89. North wind 6 to 9 mph.
7-day forecast for La Grande
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Areas Of Smoke | 6 to 9 mph N | 0% |
| Tonight | 52°F | Areas Of Smoke | 0 to 8 mph W | 0% |
| Wednesday | 97°F | Areas Of Smoke | 0 to 5 mph NE | 0% |
| Wednesday Night | 56°F | Areas Of Smoke then Mostly Clear | 5 mph W | 0% |
| Thursday | 102°F | Sunny | 1 to 6 mph W | 0% |
| Thursday Night | 61°F | Clear | 7 mph W | 0% |
| Friday | 99°F | Sunny | 2 to 13 mph W | 0% |
| Friday Night | 59°F | Mostly Clear | 5 to 13 mph W | 0% |
| Saturday | 95°F | Sunny | 2 to 14 mph W | 0% |
| Saturday Night | 57°F | Mostly Clear | 5 to 14 mph W | 0% |
| Sunday | 90°F | Sunny | 3 to 13 mph NW | 0% |
| Sunday Night | 54°F | Mostly Clear | 5 to 13 mph W | 0% |
| Monday | 90°F | Sunny | 2 to 13 mph NW | 0% |
| Monday Night | 53°F | Mostly Clear | 5 to 13 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for La Grande (45.324, -118.087). Updated through the day.
Growing snapshot for La Grande
Last spring frost
May 6
First fall frost
Oct 1
Growing season
146 days
Hardiness zone
6b
More local growing data for La Grande: nearby ZIP 97850 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, La Grande, Or (4 mi from La Grande). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.