April weather forecastLake Oswego, OR
April
Weather in April
April introduces the full bloom of spring in Lake Oswego, Oregon with temperatures averaging at a high of 58.6°F (14.8°C). This jump in temperatures compared to March marks the definite end of the cold season. Rain showers are still frequent but increasingly interspersed with days of lovely sunshine. A change that is reflected in an increase in sunny days, extended daylight hours and diminishing snowfall. This moderate weather encourages an explosion of flowering landscapes, setting the city abloom and adding a vibrant touch to the urban picture.Temperature
The onset of April marks a slight increase in the average high-temperature, moving from a fresh 52.5°F (11.4°C) in March to a mild 58.6°F (14.8°C). The temperature lowers to an average of 39.7°F (4.3°C) during April nights.Humidity
In April, the average relative humidity is 77%.Rainfall
In Lake Oswego, in April, it is raining for 18.6 days, with typically 3.19" (81mm) of accumulated precipitation. Throughout the year, there are 172.2 rainfall days, and 31.3" (795mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in April is 13h and 34min.On the first day of the month, sunrise is at 6:49 am and sunset at 7:39 pm. On the last day of April, sunrise is at 5:58 am and sunset at 8:16 pm PDT.
Sunshine
In Lake Oswego, the average sunshine in April is 7.8h.UV index
The average daily maximum UV index in April is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 3 during April translates into the following directions:
Undertake precautions - It is suggested to shield oneself from sunburn. To protect against the Sun's most potent rays, avoid direct exposure around midday. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Lake Oswego, OR
- Average high temperature in April: 58.6°F
The warmest month (with the highest average high temperature) is August (81.7°F).
The month with the lowest average high temperature is December (44.4°F).
- Average low temperature in April: 39.7°F
The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).
Average pressure in April
Lake Oswego, OR
- Average pressure in April: 30.06"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in April
Lake Oswego, OR
- Average wind speed in April: 4.8mph
The windiest month (with the highest average wind speed) is January (6mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in April
Lake Oswego, OR
- Average humidity in April: 77%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (63%).
Average rainfall in April
Lake Oswego, OR
- Average rainfall in April: 3.19"
The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in April
Lake Oswego, OR
- Average rainfall days in April: 18.6 days
The month with the highest number of rainy days is March (20.4 days).
The month with the least rainy days is July (4.8 days).
Average snowfall in April
Lake Oswego, OR
- Average snowfall in April: 0"
The month with the highest snowfall is March (1.46").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Lake Oswego, OR
- Average snowfall days in April: 0.1 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Lake Oswego, 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 48min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in April
Lake Oswego, OR
- Average sunshine days in April: 8.5 days
The month with the most sunshine days is July (23.9 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in April
Lake Oswego, 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
Lake Oswego, OR
- Average cloud cover in April: 53
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in April
Lake Oswego, OR
- Average visibility in April: 5mi
The months with the highest visibility are July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, May, June, November and December (5mi).
