April weather forecast and climate
Seattle, WA

Beautiful dusk skyline over the giant skyscrapers of Seattle, Washington
Beautiful dusk skyline over the giant skyscrapers of Seattle, Washington
April comes with loveliness in Seattle. Green grass is everywhere, and blossoming flowers are providing a spectacular look. The temperatures are mildly warmer and more pleasant in the range of 41°F (5°C) and 57.2°F (14°C), and there is a further drop in relative humidity to 70.8%. The parks get busier as visitors take to enjoying the beauty of Seattle under the pleasant weather.
The sea temperature rises to 50°F (10°C), and the very brave take to swimming and later basking in the seven hours of warm sunshine. Rainfall may interrupt in the afternoons for fourteen days, but the precipitation is moderately low at 2.8" (71.1mm).

What is the temperature in April in Seattle?

In April, in Seattle, the average high-temperature is 58.5°F (14.7°C), and the average low-temperature is 42.3°F (5.7°C).

How many days does it rain in April in Seattle?

In Seattle, in April, it is raining for 14.3 days, with typically 2.7" (68.8mm) of accumulated precipitation.

Does it snow in Seattle in April?

In April, it doesn't snow. March is the latest month when it typically snows.
Average temperature in April - Seattle, WA
  • Average high temperature in April: 58.5°F

The warmest month (with the highest average high temperature) is August (76.3°F).
The month with the lowest average high temperature is December (45.7°F).

  • Average low temperature in April: 42.2°F

The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (35.6°F).

Average humidity in April - Seattle, WA
  • Average humidity in April: 71.4%

The month with the highest relative humidity is December (80.1%).
The month with the lowest relative humidity is July (65.4%).

Average rainfall in April - Seattle, WA
  • Average rainfall in April: 2.7"

The wettest month (with the highest rainfall) is November (6.6").
The driest month (with the lowest rainfall) is July (0.7").

Average rainfall days in April - Seattle, WA
  • Average rainfall days in April: 14.3 days

The month with the highest number of rainy days is November (18.4 days).
The month with the lowest number of rainy days is August (4.8 days).

Average snowfall in April - Seattle, WA
  • Average snowfall in April: 0"

Months with the highest snowfall are February and December (1.7").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in April - Seattle, WA
  • Average snowfall days in April: 0 days

The month with the highest number of snowfall days is December (1.6 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

Average sea temperature in April - Seattle, WA
  • Average sea temperature in April: 45.8°F

The best month for swimming (with the highest average sea temperature) is August (53.5°F).
The coldest month (with the lowest average sea temperature) is February (45.3°F).

Average daylight in April / Average sunshine in April - Seattle, WA
  • Average daylight in April: 13.7h

The month with the longest days is June (Average daylight: 15.9h).
The month with shortest days is December (Average daylight: 8.5h).

  • Average sunshine in April: 6.9h

The month with most sunshine is July (Average sunshine: 10.1h).
The month with least sunshine is December (Average sunshine: 1.7h).

Average UV index in April - Seattle, WA
  • Average UV index in April: 5

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, November and December (UV index 1).

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