Happy Valley, OR Weather & Growing Conditions
Overnight
53°F
Patchy Fog
Patchy fog after 5am. Mostly cloudy, with a low around 53. North wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Patchy Fog | 1 mph N | 0% |
| Saturday | 80°F | Patchy Fog then Mostly Sunny | 1 to 5 mph NNW | 0% |
| Saturday Night | 54°F | Mostly Clear | 2 mph N | 0% |
| Sunday | 83°F | Sunny | 1 to 5 mph NNW | 0% |
| Sunday Night | 55°F | Mostly Clear | 1 to 5 mph NNW | 0% |
| Monday | 77°F | Mostly Sunny | 1 to 6 mph NNW | 0% |
| Monday Night | 55°F | Partly Cloudy | 1 to 6 mph NNW | 0% |
| Tuesday | 74°F | Mostly Sunny | 1 to 5 mph NNW | 0% |
| Tuesday Night | 51°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Wednesday | 73°F | Patchy Fog then Partly Sunny | 3 mph N | 1% |
| Wednesday Night | 53°F | Mostly Cloudy | 3 mph N | 1% |
| Thursday | 71°F | Partly Sunny | 1 to 6 mph N | 11% |
| Thursday Night | 52°F | Mostly Cloudy | 2 to 6 mph NNW | 11% |
| Friday | 70°F | Partly Sunny | 2 to 7 mph NNW | 10% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Happy Valley, OR
Last spring frost
Mar 18
First fall frost
Nov 18
Growing season
244 days
Hardiness zone
9a
Explore more for Happy Valley, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Oregon City, Or (5.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.