April weather forecastHillsboro, OR
April
Weather in April
In April, Hillsboro heralds a significant transition from the clammy weather to the delightful freshness of spring with temperatures rising up to 58.3°F (14.6°C). The rising warmth, along with visibly reduced rain and snow, predicts the onset of summer. The longer daylight hours bring with them a magnificent bloom of flowers, transforming the city into a colorful paradise. This pleasant month, charmed with balmy winds, paves the way for outdoor activities. Sunlight becomes more abundant than in March, ensuring that residents can enjoy an average of 7 hours of sunshine daily.Temperature
Hillsboro in April experiences a slight uptick in the average high-temperature, adjusting from March's cool 52.2°F (11.2°C) to a refreshing 58.3°F (14.6°C). In April, Hillsboro experiences a temperature dip to an average of 39.4°F (4.1°C) at night.Humidity
In Hillsboro, the average relative humidity in April is 78%.Rainfall
In Hillsboro, in April, it is raining for 18.6 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, there are 173 rainfall days, and 29.49" (749mm) of precipitation is accumulated.Snowfall
In Hillsboro, snow does not fall in April through October.Daylight
In Hillsboro, the average length of the day in April is 13h and 34min.On the first day of April, sunrise is at 6:50 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 8:18 pm PDT.
Sunshine
In April, the average sunshine is 7h.UV index
In Hillsboro, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: A maximum high daily UV index of 3 during April translates into the following directions:
Adopt protective measures - Suggestions to resist sunburn are offered. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Hillsboro, OR
- Average high temperature in April: 58.3°F
The warmest month (with the highest average high temperature) is August (81.5°F).
The month with the lowest average high temperature is December (43.9°F).
- Average low temperature in April: 39.4°F
The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is December (34°F).
Average pressure in April
Hillsboro, OR
- Average pressure in April: 30.07"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in April
Hillsboro, OR
- Average wind speed in April: 4.8mph
The windiest month (with the highest average wind speed) is March (5mph).
The calmest months (with the lowest average wind speed) are June, August and September (4.3mph).
Average humidity in April
Hillsboro, OR
- Average humidity in April: 78%
The months with the highest relative humidity are January, February, November and December (85%).
The month with the lowest relative humidity is August (64%).
Average rainfall in April
Hillsboro, OR
- Average rainfall in April: 2.64"
The wettest month (with the highest rainfall) is January (4.57").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in April
Hillsboro, OR
- Average rainfall days in April: 18.6 days
The month with the highest number of rainy days is March (20.8 days).
The month with the least rainy days is August (4.4 days).
Average snowfall in April
Hillsboro, OR
- Average snowfall in April: 0"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Hillsboro, OR
- Average snowfall days in April: 0 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Hillsboro, OR
- Average daylight in April: 13h and 36min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in April: 7h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in April
Hillsboro, OR
- Average sunshine days in April: 9 days
The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (8.5 days).
Average UV index in April
Hillsboro, OR
- Average UV index in April: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Hillsboro, OR
- Average cloud cover in April: 57
The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in April
Hillsboro, OR
- Average visibility in April: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January and February (4mi).
