Hillsboro, OR weather in April
April in Hillsboro: cool, with rain on most days. Highs 60°F, lows 39°F, rain on about 16 days. Keep rain gear handy.
- Normal high
- 60°F
- Normal low
- 39°F
- Wet days
- 16
- 3.3 in total
- Muggy days
- 0
- dew point 65°F+
How April changes from start to finish
| April 1 | April 30 | |
|---|---|---|
| Normal high | 57°F | 64°F |
| Normal low | 38°F | 42°F |
| Chance of a wet day | 55% | 46% |
| Sunrise / sunset | 6:51 am / 7:39 pm | 6:01 am / 8:17 pm |
| Daylight | 12.8 h | 14.3 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical April day
- 6 am43°Fdew point 40°F
- 9 am50°Fdew point 42°F
- Noon56°Fdew point 42°F
- 3 pm59°Fdew point 42°F
- 6 pm57°Fdew point 42°F
- 9 pm50°Fdew point 42°F
NOAA hourly normals (local standard time) from Portland-Hillsboro Airport (2 mi away); average wind 5 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F8 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow16 of 30
- Notable rainat least 0.10 in10 of 30
- Freezing nightslow 32°F or below3 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per April, counted from daily records for each year 1991-2020.
Rain in April
Normal precipitation is 3.3 in; a dry April brings about 1.9 in and a wet one about 4.5 in (25th and 75th percentiles). About 2 days bring half an inch or more. Snow is very rare.
How April varies from year to year
- Warmest April, 1991-20202004: average high 68°F
- Coolest April2008: average high 55°F
- Wettest April1996: 7.1 in
- Driest April2020: 1.0 in
- Highest reading89°F (April 27, 2004)
- Lowest reading25°F (April 1, 2008)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
April compared with March and May
| March | April | May | |
|---|---|---|---|
| Normal high | 55°F | 60°F | 68°F |
| Normal low | 36°F | 39°F | 45°F |
| Wet days | 18 | 16 | 12 |
| Comfortable days | 4 | 8 | 15 |
| Daylight | 11.9 h | 13.5 h | 14.9 h |
Highs change by +5°F from March and +8°F into May.
Nearby alternatives in April
- Drier: Bend, OR130 mi · high 58°F · 6 wet days
- Cooler: Port Angeles, WA181 mi · high 54°F · 12 wet days
How Hillsboro ranks in April
- Normal high270th warmest of 378 cities; 4th of 6 in Oregon
- Wet days370th driest of 378
- Comfortable days238th most of 340
What to pack for Hillsboro in April
- A warm jacket – lows near 39°F, highs near 60°F
- A rain jacket or umbrella – rain on about 16 days
Frost in April
The last spring frost typically comes around Apr 16; in 1 year in 10 it comes after May 3. All frost dates for Hillsboro.
Heating and cooling
April has 461 heating degree days and 1 cooling degree days (base 65°F), 9% of the year's total heating and cooling demand.
Questions
How cold is Hillsboro in April?
The normal high is 60°F and the normal low is 39°F. From 1991 to 2020 the coldest April reading was 25°F (April 1, 2008).
Does it rain a lot in Hillsboro in April?
About 16 days in April have at least 0.01 in of precipitation, and the normal total is 3.3 in. The wettest April in 1991-2020 was in 1996 (7.1 in); the driest was in 2020 (1.0 in).
Does it snow in Hillsboro in April?
Snow is very rare: the 1991-2020 normal for April rounds to 0.0 in.
Is April a good time to visit Hillsboro?
April ranks 6th of 12 months on our comfort score for Hillsboro (59 out of 100). It has about 8 comfortable days. The best month is June.
Where the numbers come from
- Temperature and snow depth: Forest Grove (USC00352997), 5.5 mi W of the city center, 180 ft . NOAA normals and daily records, 1991-2020.
- Rain and snowfall: Dilley 2 S (USC00352325), 7.3 mi SW of the city center, 194 ft . NOAA normals and daily records, 1991-2020.
- Frost dates and humidity and wind by hour: Portland-Hillsboro Airport (USW00094261), 2.3 mi ENE of the city center, 204 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Portland International Airport (726980-24229), 19 mi ENE of the city center, 22 ft (173 ft lower than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).