Hillsboro weather in April: Hillsboro, Oregon: normal highs, lows, rain and records for April
Hillsboro in April has a normal high of 61°F and a normal low of 39°F, a daily mean of 50°F, rising from 58°F on the 1st to 65°F by the 30th. Measurable precipitation falls on 16 days in a normal April, 2.57 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 16°C and low of 4°C, 65 mm of precipitation in April.
- 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 April?
The normal high is 61°F and the normal low 39°F, for a daily mean of 50.1°F. April is 3.9°F warmer than March and 6.6°F cooler than May. April is the 7th warmest month of the year in Hillsboro and the 7th wettest. Across the month the normal high rises 7°F, from 58°F on April 1 to 65°F on April 30. From one year to the next April's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 48°F and 52°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 58%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 58°F | 38°F | 58% | 31% |
| April 8 | 59°F | 38°F | 56% | 29% |
| April 15 | 61°F | 39°F | 53% | 27% |
| April 22 | 63°F | 40°F | 49% | 24% |
| April 30 | 65°F | 41°F | 45% | 22% |
Every day of April: normal high, low and chance of precipitation (warmest afternoon April 30, coldest night April 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| April 1 | 58°F | 38°F | 58% | 31% | 12 h 40 min |
| April 2 | 58°F | 38°F | 58% | 31% | 12 h 50 min |
| April 3 | 58°F | 38°F | 57% | 30% | 12 h 50 min |
| April 4 | 58°F | 38°F | 57% | 30% | 12 h 50 min |
| April 5 | 58°F | 38°F | 57% | 30% | 13 h |
| April 6 | 59°F | 38°F | 57% | 29% | 13 h |
| April 7 | 59°F | 38°F | 57% | 29% | 13 h |
| April 8 | 59°F | 38°F | 56% | 29% | 13 h 10 min |
| April 9 | 59°F | 38°F | 56% | 29% | 13 h 10 min |
| April 10 | 59°F | 39°F | 56% | 28% | 13 h 10 min |
| April 11 | 60°F | 39°F | 55% | 28% | 13 h 20 min |
| April 12 | 60°F | 39°F | 55% | 28% | 13 h 20 min |
| April 13 | 60°F | 39°F | 54% | 27% | 13 h 20 min |
| April 14 | 60°F | 39°F | 54% | 27% | 13 h 30 min |
| April 15 | 61°F | 39°F | 53% | 27% | 13 h 30 min |
| April 16 | 61°F | 39°F | 53% | 26% | 13 h 30 min |
| April 17 | 61°F | 39°F | 52% | 26% | 13 h 30 min |
| April 18 | 61°F | 39°F | 52% | 26% | 13 h 40 min |
| April 19 | 62°F | 39°F | 51% | 25% | 13 h 40 min |
| April 20 | 62°F | 40°F | 50% | 25% | 13 h 40 min |
| April 21 | 62°F | 40°F | 50% | 25% | 13 h 50 min |
| April 22 | 63°F | 40°F | 49% | 24% | 13 h 50 min |
| April 23 | 63°F | 40°F | 49% | 24% | 13 h 50 min |
| April 24 | 63°F | 40°F | 48% | 24% | 14 h |
| April 25 | 63°F | 40°F | 48% | 24% | 14 h |
| April 26 | 64°F | 41°F | 47% | 23% | 14 h |
| April 27 | 64°F | 41°F | 47% | 23% | 14 h |
| April 28 | 64°F | 41°F | 46% | 23% | 14 h 10 min |
| April 29 | 65°F | 41°F | 46% | 23% | 14 h 10 min |
| April 30 | 65°F | 41°F | 45% | 22% | 14 h 10 min |
- Normal high
- 61°FApril average
- Normal low
- 39°FApril average
- Precipitation
- 2.57 inmonth total
- Days with precipitation
- 160.01 inch or more
- Nights at 32°F or colder
- 3
- Daylight
- 12 h 40 min to 14 h 10 minApril 1 to April 30
- Days at 70°F or more
- 4
- Days at 80°F or more
- 1
- Sunshine
- 63%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 April?
On a given April day the chance of 0.01 inch or more is 52% on average, highest around April 1 (58%). In all, 2.57 in falls on 16 days of a normal April.
In a normal April 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 April?
At 3 p.m. the normal temperature is 63°F with 49% relative humidity and a dew point of 43°F; at 6 a.m. it is 45°F with 90% humidity. The wind averages 5.3 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 45°F | 42°F | 90% | 2.3 mph | 41% |
| 9 a.m. | 54°F | 44°F | 70% | 4.5 mph | 36% |
| noon | 60°F | 44°F | 55% | 6.7 mph | 40% |
| 3 p.m. | 63°F | 43°F | 49% | 7.9 mph | 42% |
| 6 p.m. | 60°F | 44°F | 54% | 8.3 mph | 46% |
| 9 p.m. | 52°F | 44°F | 72% | 5.7 mph | 57% |
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 April in Hillsboro?
The warmest April temperature on Hillsboro's official record (since 1929) is 90°F, on April 29, 1957; the coldest is 20°F, on April 16, 1933. The wettest April brought 5.91 in (2003); the snowiest, 2.5 inches (1936).
The April mean against the 1991-2020 normal of 50.1°F: 2021 51.2°F (+1.1), 2022 46.3°F (−3.8), 2023 49.0°F (−1.1), 2024 51.0°F (+0.9), 2025 51.9°F (+1.8), 2026 53.0°F (+2.9). 4 of 6 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 51.2°F | +1.1°F | 0.45 in |
| 2022 | 46.3°F | −3.8°F | 4.80 in |
| 2023 | 49.0°F | −1.1°F | 4.25 in |
| 2024 | 51.0°F | +0.9°F | 1.61 in |
| 2025 | 51.9°F | +1.8°F | 1.23 in |
| 2026 | 53.0°F | +2.9°F | 2.92 in |
Source: records: ACIS, NWS threaded record HIOthr; recent months: ACIS, station USW00094261. Records and recent months use complete months only.
How does April in Hillsboro compare across Oregon?
Across the 105 places PlainClimate covers in Oregon, April normal highs run from 45°F in Government Camp to 67°F in Cave Junction; Hillsboro's is 61°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.