Hillsboro, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hillsboro, a city in Washington County, Oregon.
Today
96°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 96. North northeast wind 5 to 8 mph.
7-day forecast for Hillsboro
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 96°F | Areas Of Smoke | 5 to 8 mph NNE | 0% |
| Tonight | 64°F | Smoke | 2 to 8 mph NNW | 0% |
| Wednesday | 100°F | Areas Of Smoke | 3 mph N | 0% |
| Wednesday Night | 64°F | Clear | 0 to 5 mph NNW | 0% |
| Thursday | 100°F | Sunny | 2 mph N | 0% |
| Thursday Night | 62°F | Clear | 0 to 6 mph NNW | 0% |
| Friday | 94°F | Sunny | 0 to 8 mph N | 0% |
| Friday Night | 60°F | Mostly Clear | 1 to 8 mph NNW | 0% |
| Saturday | 87°F | Sunny | 1 to 10 mph NNW | 0% |
| Saturday Night | 56°F | Mostly Clear | 1 to 10 mph NNW | 0% |
| Sunday | 82°F | Sunny | 1 to 9 mph NNW | 0% |
| Sunday Night | 55°F | Mostly Clear | 0 to 9 mph NNW | 0% |
| Monday | 82°F | Sunny | 0 to 8 mph NNW | 0% |
| Monday Night | 55°F | Mostly Clear | 0 to 8 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Hillsboro (45.527, -122.935). Updated through the day.
Growing snapshot for Hillsboro
Last spring frost
Apr 16
First fall frost
Oct 23
Growing season
191 days
Hardiness zone
8b
More local growing data for Hillsboro: nearby ZIP 97124 weather · frost dates · planting calendar · Oregon frost dates
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Climate data from the nearest NOAA station, Portland-Hillsboro Ap, Or (2 mi from Hillsboro). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.