Seattle
Washington, USA
Long-term weather forecast
Long-term weather forecast

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 around fourteen days, but the precipitation is moderately low at 2.8" (71.1mm).
  • The average high temperature in April: 14.7°C

The warmest month (with the highest average high temperature) is August (24.6°C).
The month with the lowest average high temperature is December (7.6°C).

  • The average low temperature in April: 5.7°C

The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is December (2°C).

  • The 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%).

  • The average rainfall in April: 68.8mm

The wettest month (with the highest rainfall) is November (166.9mm).
The driest month (with the lowest rainfall) is July (17.8mm).

  • The 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).

  • The average snowfall in April: 0mm

Months with the highest snowfall are February and December (43.2mm).
Months with the lowest snowfall are April, May, June, July, August, September and October (0mm).

  • The 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).

  • The average daylight in April: 14h

Months with the longest days are June and July (Average daylight: 16h).
The month with shortest days is December (Average daylight: 8h).

  • The 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).

  • The 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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