Hillsboro weather in October: Hillsboro, Oregon: normal highs, lows, rain and records for October
Hillsboro in October has a normal high of 64°F and a normal low of 41°F, a daily mean of 52°F, falling from 71°F on the 1st to 58°F by the 31st. Measurable precipitation falls on 15 days in a normal October, 3.37 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 18°C and low of 5°C, 86 mm of precipitation in October.
- NOAA stationPortland-Hillsboro Airport
- Station IDUSW00094261
- Location45.54°N 122.95°W
- Elevation204 ft (62 m)
- Population110,337
- Jan 47° 34°
- Feb 51° 34°
- Mar 56° 37°
- Apr 61° 39°
- May 69° 45°
- Jun 74° 49°
- Jul 82° 52°
- Aug 82° 52°
- Sep 76° 48°
- Oct 64° 41°
- Nov 53° 37°
- Dec 46° 33°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Hillsboro in October?
The normal high is 64°F and the normal low 41°F, for a daily mean of 52.3°F. October is 9.7°F cooler than September and 7.7°F warmer than November. October is the 6th warmest month of the year in Hillsboro and the 6th wettest. Across the month the normal high falls 13°F, from 71°F on October 1 to 58°F on October 31. From one year to the next October's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 50°F and 55°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 57%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 71°F | 44°F | 36% | 17% |
| October 8 | 67°F | 42°F | 42% | 20% |
| October 15 | 64°F | 41°F | 46% | 23% |
| October 22 | 61°F | 40°F | 51% | 27% |
| October 31 | 58°F | 38°F | 57% | 32% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 71°F | 44°F | 36% | 17% | 11 h 50 min |
| October 2 | 70°F | 44°F | 37% | 18% | 11 h 40 min |
| October 3 | 70°F | 44°F | 38% | 18% | 11 h 40 min |
| October 4 | 69°F | 43°F | 39% | 19% | 11 h 40 min |
| October 5 | 69°F | 43°F | 39% | 19% | 11 h 30 min |
| October 6 | 68°F | 43°F | 40% | 19% | 11 h 30 min |
| October 7 | 68°F | 43°F | 41% | 20% | 11 h 30 min |
| October 8 | 67°F | 42°F | 42% | 20% | 11 h 20 min |
| October 9 | 67°F | 42°F | 42% | 21% | 11 h 20 min |
| October 10 | 66°F | 42°F | 43% | 21% | 11 h 20 min |
| October 11 | 66°F | 42°F | 44% | 22% | 11 h 10 min |
| October 12 | 65°F | 42°F | 44% | 22% | 11 h 10 min |
| October 13 | 65°F | 41°F | 45% | 23% | 11 h 10 min |
| October 14 | 64°F | 41°F | 46% | 23% | 11 h 10 min |
| October 15 | 64°F | 41°F | 46% | 23% | 11 h |
| October 16 | 64°F | 41°F | 47% | 24% | 11 h |
| October 17 | 63°F | 41°F | 48% | 24% | 11 h |
| October 18 | 63°F | 40°F | 48% | 25% | 10 h 50 min |
| October 19 | 62°F | 40°F | 49% | 25% | 10 h 50 min |
| October 20 | 62°F | 40°F | 50% | 26% | 10 h 50 min |
| October 21 | 61°F | 40°F | 51% | 26% | 10 h 40 min |
| October 22 | 61°F | 40°F | 51% | 27% | 10 h 40 min |
| October 23 | 61°F | 39°F | 52% | 27% | 10 h 40 min |
| October 24 | 60°F | 39°F | 53% | 28% | 10 h 30 min |
| October 25 | 60°F | 39°F | 54% | 28% | 10 h 30 min |
| October 26 | 59°F | 39°F | 54% | 29% | 10 h 30 min |
| October 27 | 59°F | 39°F | 55% | 30% | 10 h 30 min |
| October 28 | 59°F | 39°F | 56% | 30% | 10 h 20 min |
| October 29 | 58°F | 39°F | 56% | 31% | 10 h 20 min |
| October 30 | 58°F | 39°F | 57% | 31% | 10 h 20 min |
| October 31 | 58°F | 38°F | 57% | 32% | 10 h 10 min |
- Normal high
- 64°FOctober average
- Normal low
- 41°FOctober average
- Precipitation
- 3.37 inmonth total
- Days with precipitation
- 150.01 inch or more
- Nights at 32°F or colder
- 3
- Daylight
- 11 h 50 min to 10 h 10 minOctober 1 to October 31
- Days at 70°F or more
- 6
- Days at 80°F or more
- 1
- Sunshine
- 67%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094261; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Hillsboro in October?
On a given October day the chance of 0.01 inch or more is 47% on average, highest around October 31 (57%). In all, 3.37 in falls on 15 days of a normal October.
In a normal October in Hillsboro, 3 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094261.
How humid and windy is Hillsboro in October?
At 3 p.m. the normal temperature is 56°F with 63% relative humidity and a dew point of 43°F; at 6 a.m. it is 43°F with 92% humidity. The wind averages 4.0 mph, most often from the south-southeast in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 43°F | 41°F | 92% | 3.0 mph | – |
| 9 a.m. | 47°F | 43°F | 87% | 3.5 mph | – |
| noon | 53°F | 44°F | 71% | 5.3 mph | – |
| 3 p.m. | 56°F | 43°F | 63% | 6.0 mph | – |
| 6 p.m. | 50°F | 44°F | 77% | 4.2 mph | 49% |
| 9 p.m. | 46°F | 43°F | 87% | 3.5 mph | 51% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094261. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for October in Hillsboro?
The warmest October temperature on Hillsboro's official record (since 1929) is 92°F, on October 2, 1952; the coldest is 20°F, on October 31, 2002. The wettest October brought 8.66 in (2016).
The October mean against the 1991-2020 normal of 52.3°F: 2021 51.3°F (−1.0), 2022 57.9°F (+5.6), 2023 54.5°F (+2.2), 2024 53.5°F (+1.2), 2025 52.2°F (−0.1). 3 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 51.3°F | −1.0°F | 3.96 in |
| 2022 | 57.9°F | +5.6°F | 2.53 in |
| 2023 | 54.5°F | +2.2°F | 2.05 in |
| 2024 | 53.5°F | +1.2°F | 3.42 in |
| 2025 | 52.2°F | −0.1°F | 3.72 in |
Source: records: ACIS, NWS threaded record HIOthr; recent months: ACIS, station USW00094261. Records and recent months use complete months only.
How does October in Hillsboro compare across Oregon?
Across the 105 places PlainClimate covers in Oregon, October normal highs run from 53°F in Government Camp to 72°F in Ruch; Hillsboro's is 64°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.