Hillsboro, OR Weather & Growing Conditions
Overnight
38°F
Patchy Fog
Patchy fog after 5am. Partly cloudy, with a low around 38. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 38°F | Patchy Fog | 0 mph | 0% |
| Wednesday | 55°F | Patchy Fog then Light Rain Likely | 2 mph SE | 70% |
| Wednesday Night | 45°F | Light Rain then Areas Of Fog | 0 to 6 mph SSW | 87% |
| Thursday | 58°F | Areas Of Fog then Mostly Sunny | 1 mph SSW | 5% |
| Thursday Night | 42°F | Mostly Cloudy then Slight Chance Light Rain | 0 mph | 22% |
| Friday | 57°F | Chance Light Rain | 2 mph S | 31% |
| Friday Night | 45°F | Chance Light Rain then Mostly Cloudy | 2 mph E | 29% |
| Saturday | 62°F | Partly Sunny then Chance Light Rain | 2 mph SSE | 25% |
| Saturday Night | 48°F | Light Rain | 2 to 13 mph S | 75% |
| Sunday | 58°F | Chance Light Rain | 0 to 7 mph SSW | 35% |
| Sunday Night | 42°F | Mostly Cloudy then Slight Chance Light Rain | 0 mph | 15% |
| Monday | 56°F | Chance Light Rain | 1 mph SE | 32% |
| Monday Night | 45°F | Chance Light Rain | 2 mph S | 38% |
| Tuesday | 58°F | Chance Light Rain | 2 mph S | 41% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hillsboro, OR
Last spring frost
Apr 16
First fall frost
Oct 23
Growing season
191 days
Hardiness zone
8b
Explore more for Hillsboro, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Portland-Hillsboro Ap, Or (6.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.