June 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
Summer begins officially in June bringing with it a tolerable 66.8% humidity and warmer temperatures in the range of 51.8°F (11°C) and 69.8°F (21°C). Outdoors become more tolerable as more tourists flock Seattle for summer. The daylight hours extend to sixteen, and the sunshine hours rise to nine.
The sea temperature warms up to 55.4°F (13°C), making it accessible for a swim in the pleasant weather.
The skies clear up, and the rainy days in June reduce significantly to nine with low precipitation of 1.9" (48.3mm).

What is the temperature in June in Seattle?

In June, the average high-temperature is 70°F (21.1°C), and the average low-temperature is 52°F (11.1°C).

How many days does it rain in June in Seattle?

In June, in Seattle, the rain falls for 9.1 days. Throughout June, 1.6" (39.9mm) of precipitation is accumulated.
Average temperature in June - Seattle, WA
  • Average high temperature in June: 69.9°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 June: 51.9°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 June - Seattle, WA
  • Average humidity in June: 67.1%

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 June - Seattle, WA
  • Average rainfall in June: 1.6"

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 June - Seattle, WA
  • Average rainfall days in June: 9.1 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 June - Seattle, WA
  • Average snowfall in June: 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 June - Seattle, WA
  • Average snowfall days in June: 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 June - Seattle, WA
  • Average sea temperature in June: 47.6°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 June / Average sunshine in June - Seattle, WA
  • Average daylight in June: 15.9h

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 June: 8.9h

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 June - Seattle, WA
  • Average UV index in June: 7

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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