Climate averages 1991–2020
Hillsboro weather
in October.
A mild, wet month: the 6th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Hillsboro: daytime highs average 16.7°C and nights cool to about 8.0°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 107 mm of rain on roughly 12 days, which makes October a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 59 min on an average October day.
The nearest other city in this atlas is Beaverton (15 km away). In October its highs average 16.6°C, about as warm as Hillsboro, with 106 mm of rain.
Among the 498 cities listed in the United States, Hillsboro ranks joint 373rd of 498 for the warmest October highs and joint 453rd of 498 for the driest October (rainfall, lowest first). The mean October high of those 498 cities is 21.4°C; Hillsboro is 4.7°C cooler than that mean.
From October to November, average highs fall by 6.0°C to 10.7°C, and monthly rainfall rises from 107 mm to 179 mm.
The annual picture
October in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Hillsboro climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.9°C1.8°C | 1.8°C | 172 | 17.1 | 9.19 h |
| February | 9.7°C2.1°C | 2.1°C | 133 | 14.4 | 10.310 h |
| March | 12.1°C3.5°C | 3.5°C | 151 | 17.3 | 11.912 h |
| April | 14.6°C5.2°C | 5.2°C | 115 | 15.6 | 13.513 h |
| May | 18.6°C8.4°C | 8.4°C | 69 | 10.6 | 14.915 h |
| June | 21.5°C11.0°C | 11.0°C | 40 | 7.2 | 15.616 h |
| July | 26.6°C13.8°C | 13.8°C | 11 | 2.2 | 15.315 h |
| August | 27.1°C14.4°C | 14.4°C | 13 | 2.5 | 14.114 h |
| September | 23.7°C12.2°C | 12.2°C | 43 | 6.0 | 12.613 h |
| October, selected | 16.7°C8.0°C | 8.0°C | 107 | 11.5 | 11.011 h |
| November | 10.7°C4.2°C | 4.2°C | 179 | 17.3 | 9.610 h |
| December | 7.4°C1.7°C | 1.7°C | 204 | 17.5 | 8.89 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Beaverton in OctoberUnited States · 15 kmHigh 16.6°C · Low 7.9°C · 106 mm rain
- Portland in OctoberUnited States · 24 kmHigh 17.0°C · Low 8.1°C · 106 mm rain
- Vancouver, United States in OctoberUnited States · 29 kmHigh 16.5°C · Low 7.9°C · 143 mm rain
- Gresham in OctoberUnited States · 44 kmHigh 16.0°C · Low 7.1°C · 147 mm rain
- Salem, United States in OctoberUnited States · 65 kmHigh 17.4°C · Low 7.9°C · 87 mm rain
- Eugene in OctoberUnited States · 164 kmHigh 17.4°C · Low 7.3°C · 107 mm rain
- Tacoma in OctoberUnited States · 197 kmHigh 14.7°C · Low 7.9°C · 112 mm rain
- Federal Way in OctoberUnited States · 207 kmHigh 14.3°C · Low 7.2°C · 131 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Hillsboro) is explained once on the Hillsboro year overview and on the Sources, method and limits page.