April weather forecast
Lake Oswego, OR

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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

April's arrival in Lake Oswego coincides with a marginal rise in the average high-temperature, moving from March's fresh 52.5°F (11.4°C) to a moderate 58.6°F (14.8°C). Lake Oswego experiences a consistent average temperature of 39.7°F (4.3°C) throughout the nights in April.

Humidity

In Lake Oswego, the average relative humidity in April is 77%.

Rainfall

In Lake Oswego, Oregon, during April, the rain falls for 18.6 days and regularly aggregates up to 3.19" (81mm) of precipitation. In Lake Oswego, during the entire year, the rain falls for 172.2 days and collects up to 31.3" (795mm) of precipitation.

Snowfall

In Lake Oswego, snow does not fall in April through October.

Daylight

In Lake Oswego, 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, in Lake Oswego, sunrise is at 5:58 am and sunset at 8:16 pm PDT.

Sunshine

The average sunshine in April is 7.8h.

UV index

In Lake Oswego, the average daily maximum UV index in April is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 3 during April translates into these guidelines:
Guard yourself - Avoiding sunburn is suggested. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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Frequently asked questions

What is the temperature in April in Lake Oswego?

During April, Lake Oswego experiences an average high-temperature of 58.6°F (14.8°C) and a low-temperature of 39.7°F (4.3°C).

What is the average humidity in April in Lake Oswego?

In April, the average relative humidity in Lake Oswego is 77%.

How many days does it rain in April in Lake Oswego?

In Lake Oswego, Oregon, during April, the rain falls for 18.6 days and regularly aggregates up to 3.19" (81mm) of precipitation.

When it does not snow in Lake Oswego?

In Lake Oswego, snow does not fall in April through October.

Does it snow in Lake Oswego in April?

In April, in Lake Oswego, it doesn't snow. March is the latest month when it typically snows.

What is the average length of the day in April in Lake Oswego?

In Lake Oswego, Oregon, the average day length in April is 13h and 34min.

When are sunrise and sunset in April in Lake Oswego?

On the first day of April, sunrise is at 6:49 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 5:58 am and sunset at 8:16 pm PDT.

How long on average sun shines in April in Lake Oswego?

In April, the average sunshine duration in Lake Oswego is 7.8h.

What is the UV index intensity in April in Lake Oswego?

The average daily maximum UV index in April in Lake Oswego is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Lake Oswego, OR

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).

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Average pressure in April
Lake Oswego, OR

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).

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Average wind speed in April
Lake Oswego, OR

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).

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Average humidity in April
Lake Oswego, OR

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%).

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Average rainfall in April
Lake Oswego, OR

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").

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Average rainfall days in April
Lake Oswego, OR

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).

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Average snowfall in April
Lake Oswego, OR

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").

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Average snowfall days in April
Lake Oswego, OR

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).

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Average daylight in April /
Average sunshine in April
Lake Oswego, OR

Average daylight in April / Average sunshine in April - Lake Oswego, OR
  • Average daylight in April: 13h and 4min

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 5min

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).

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Average sunshine days in April
Lake Oswego, OR

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).

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Average UV index in April
Lake Oswego, OR

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).

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Average cloud cover in April
Lake Oswego, OR

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).

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Average visibility in April
Lake Oswego, OR

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).

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Lake Oswego, Oregon, USA

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