Union, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Union, a city in Union County, Oregon.
Today
88°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 88. Northwest wind 3 to 12 mph.
7-day forecast for Union
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Areas Of Smoke | 3 to 12 mph NW | 0% |
| Tonight | 52°F | Areas Of Smoke | 1 to 12 mph NE | 0% |
| Wednesday | 95°F | Patchy Smoke | 0 to 6 mph NW | 0% |
| Wednesday Night | 57°F | Patchy Smoke then Mostly Clear | 2 to 6 mph NE | 0% |
| Thursday | 100°F | Sunny | 0 to 8 mph NW | 0% |
| Thursday Night | 61°F | Mostly Clear | 2 to 8 mph N | 0% |
| Friday | 98°F | Sunny | 2 to 14 mph N | 0% |
| Friday Night | 59°F | Mostly Clear | 2 to 14 mph N | 0% |
| Saturday | 95°F | Sunny | 2 to 15 mph N | 0% |
| Saturday Night | 57°F | Mostly Clear | 5 to 15 mph NW | 0% |
| Sunday | 90°F | Sunny | 5 to 15 mph NW | 0% |
| Sunday Night | 54°F | Mostly Clear | 3 to 15 mph NW | 0% |
| Monday | 89°F | Sunny | 3 to 15 mph NW | 0% |
| Monday Night | 53°F | Mostly Clear | 3 to 15 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Union (45.209, -117.868). Updated through the day.
Growing snapshot for Union
Last spring frost
May 11
First fall frost
Sep 26
Growing season
136 days
Hardiness zone
6b
More local growing data for Union: nearby ZIP 97824 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Union, Or (12 mi from Union). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.