La Grande, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for La Grande, a city in Union County, Oregon.
This Afternoon
56°F
Slight Chance Rain Showers
A slight chance of rain showers before 1pm. Mostly cloudy. High near 56, with temperatures falling to around 50 in the afternoon. Southeast wind 3 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
7-day forecast for La Grande
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 56°F | Slight Chance Rain Showers | 3 to 13 mph SE | 15% |
| Tonight | 31°F | Patchy Fog | 5 mph NW | 1% |
| Wednesday | 57°F | Patchy Freezing Fog then Sunny | 2 mph W | 0% |
| Wednesday Night | 36°F | Patchy Fog | 1 to 5 mph SW | 45% |
| Thursday | 54°F | Chance Rain Showers then Partly Sunny | 3 mph W | 45% |
| Thursday Night | 33°F | Partly Cloudy | 1 to 23 mph S | 6% |
| Friday | 55°F | Partly Sunny | 7 to 23 mph S | 11% |
| Friday Night | 38°F | Mostly Cloudy | 7 to 24 mph S | 7% |
| Saturday | 61°F | Mostly Sunny | 17 to 24 mph SE | 1% |
| Saturday Night | 41°F | Mostly Cloudy | 20 to 30 mph S | 10% |
| Sunday | 60°F | Partly Sunny | 2 to 29 mph SW | 12% |
| Sunday Night | 37°F | Mostly Cloudy | 2 to 10 mph S | 11% |
| Monday | 60°F | Partly Sunny | 2 to 10 mph SE | 14% |
| Monday Night | 38°F | Mostly Cloudy then Slight Chance Rain Showers | 2 to 15 mph S | 16% |
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 Nov 3, 2026.