La Grande, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for La Grande, a city in Union County, Oregon.
Tonight
47°F
Partly Cloudy
Partly cloudy, with a low around 47. West wind around 5 mph.
7-day forecast for La Grande
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Partly Cloudy | 5 mph W | 0% |
| Saturday | 79°F | Sunny | 2 to 6 mph NW | 0% |
| Saturday Night | 47°F | Mostly Clear | 0 to 6 mph W | 0% |
| Sunday | 82°F | Sunny | 2 mph SE | 0% |
| Sunday Night | 50°F | Clear | 3 mph S | 0% |
| Monday | 84°F | Sunny | 2 to 6 mph SE | 0% |
| Monday Night | 51°F | Mostly Clear | 3 mph W | 0% |
| Tuesday | 83°F | Sunny | 1 to 6 mph N | 2% |
| Tuesday Night | 49°F | Mostly Clear | 6 mph W | 2% |
| Wednesday | 80°F | Sunny | 1 to 7 mph W | 3% |
| Wednesday Night | 47°F | Partly Cloudy | 7 mph W | 3% |
| Thursday | 79°F | Mostly Sunny | 5 to 8 mph SE | 3% |
| Thursday Night | 47°F | Partly Cloudy | 9 mph W | 4% |
| Friday | 74°F | Mostly Sunny | 9 mph W | 10% |
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 Sep 19, 2026.