Union, OR Weather & Growing Conditions
Overnight
33°F
Mostly Clear
Mostly clear, with a low around 33. North wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 33°F | Mostly Clear | 1 mph N | 0% |
| Wednesday | 53°F | Sunny | 2 mph NW | 0% |
| Wednesday Night | 36°F | Mostly Cloudy then Rain Showers Likely | 2 mph NE | 56% |
| Thursday | 48°F | Rain Showers Likely then Partly Sunny | 0 to 5 mph N | 56% |
| Thursday Night | 32°F | Mostly Clear | 1 to 5 mph E | 0% |
| Friday | 51°F | Partly Sunny | 5 to 9 mph SE | 1% |
| Friday Night | 37°F | Mostly Cloudy | 6 mph SE | 1% |
| Saturday | 56°F | Mostly Sunny | 6 to 15 mph SE | 1% |
| Saturday Night | 40°F | Partly Cloudy | 13 to 20 mph SE | 5% |
| Sunday | 55°F | Partly Sunny | 2 to 14 mph S | 7% |
| Sunday Night | 38°F | Mostly Cloudy | 3 mph NE | 5% |
| Monday | 55°F | Partly Sunny | 3 to 8 mph SE | 3% |
| Monday Night | 39°F | Mostly Cloudy | 5 mph SE | 11% |
| Tuesday | 55°F | Slight Chance Rain Showers | 3 to 9 mph SE | 17% |
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 Nov 4, 2026.