Happy Valley, OR Weather & Growing Conditions
Tonight
40°F
Mostly Clear then Patchy Fog
Patchy fog after midnight. Mostly clear, with a low around 40. East wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Mostly Clear then Patchy Fog | 1 mph E | 4% |
| Wednesday | 59°F | Patchy Fog then Chance Light Rain | 2 mph S | 47% |
| Wednesday Night | 49°F | Light Rain | 2 to 9 mph S | 95% |
| Thursday | 59°F | Chance Light Rain then Partly Sunny | 1 to 5 mph SSW | 31% |
| Thursday Night | 47°F | Mostly Cloudy then Chance Light Rain | 2 mph SE | 45% |
| Friday | 59°F | Chance Light Rain | 2 mph SSE | 47% |
| Friday Night | 48°F | Slight Chance Light Rain | 2 mph SE | 18% |
| Saturday | 65°F | Partly Sunny then Slight Chance Light Rain | 2 mph SSE | 15% |
| Saturday Night | 51°F | Light Rain Likely | 2 to 10 mph S | 72% |
| Sunday | 60°F | Light Rain Likely | 2 to 8 mph SSW | 72% |
| Sunday Night | 46°F | Patchy Fog | 2 mph E | 17% |
| Monday | 59°F | Patchy Fog then Chance Light Rain | 2 mph SE | 43% |
| Monday Night | 48°F | Chance Light Rain | 5 mph SSE | 48% |
| Tuesday | 62°F | Chance Light Rain | 5 mph S | 51% |
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 Nov 4, 2026.