Hillsboro, OR Weather & Growing Conditions
Overnight
36°F
Areas Of Fog
Areas of fog before 4am, then areas of fog and patchy frost. Mostly clear, with a low around 36. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 36°F | Areas Of Fog | 0 mph | 2% |
| Wednesday | 56°F | Areas Of Fog then Light Rain Likely | 2 mph SSE | 66% |
| Wednesday Night | 41°F | Light Rain then Areas Of Fog | 2 mph S | 86% |
| Thursday | 59°F | Areas Of Fog then Mostly Sunny | 1 mph N | 2% |
| Thursday Night | 39°F | Areas Of Fog | 0 mph | 32% |
| Friday | 57°F | Areas Of Fog then Chance Light Rain | 1 mph SSE | 38% |
| Friday Night | 42°F | Chance Light Rain | 1 mph E | 33% |
| Saturday | 63°F | Partly Sunny then Chance Light Rain | 1 mph SSE | 25% |
| Saturday Night | 45°F | Light Rain | 1 to 10 mph S | 76% |
| Sunday | 58°F | Chance Light Rain | 0 to 3 mph SW | 34% |
| Sunday Night | 39°F | Mostly Cloudy then Slight Chance Light Rain | 0 mph | 15% |
| Monday | 57°F | Chance Light Rain | 0 mph | 33% |
| Monday Night | 42°F | Chance Light Rain | 1 mph S | 40% |
| Tuesday | 58°F | Chance Light Rain | 1 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 (2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.