Union, OR Weather & Growing Conditions
Overnight
48°F
Partly Cloudy
Partly cloudy, with a low around 48. Northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Partly Cloudy | 2 mph NW | 1% |
| Saturday | 73°F | Sunny | 1 to 7 mph NW | 1% |
| Saturday Night | 49°F | Mostly Clear | 0 to 5 mph E | 1% |
| Sunday | 76°F | Sunny | 0 to 5 mph S | 1% |
| Sunday Night | 52°F | Mostly Clear | 1 mph E | 0% |
| Monday | 78°F | Sunny | 1 to 6 mph S | 0% |
| Monday Night | 52°F | Mostly Clear | 1 mph N | 0% |
| Tuesday | 77°F | Sunny | 0 to 5 mph SW | 3% |
| Tuesday Night | 51°F | Mostly Clear | 3 mph N | 3% |
| Wednesday | 76°F | Sunny | 1 to 8 mph S | 3% |
| Wednesday Night | 51°F | Partly Cloudy | 2 to 6 mph N | 3% |
| Thursday | 75°F | Mostly Sunny | 2 to 8 mph SE | 2% |
| Thursday Night | 51°F | Partly Cloudy | 7 mph E | 4% |
| Friday | 71°F | Mostly Sunny | 5 to 9 mph SW | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Union, OR
Last spring frost
May 11
First fall frost
Sep 26
Growing season
136 days
Hardiness zone
6b
Explore more for Union, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Union, Or (11.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.