Temperature in Washington State in May

Daytime highs, nighttime lows and the warmest cities in Washington State, the United States of America this May.

Washington State, the United States of America, a region in the United States of America, experiences maximum daytime temperatures in May ranging from 3°C (37°F) in Mount Rainier National Park to 24°C (75°F) in Kennewick. Nighttime temperatures generally drop to 9°C (48°F) in Kennewick and -8°C (18°F) in Mount Rainier National Park .

What is the temperature of the different cities in Washington State, the United States of America in May?

Discover the typical May temperatures for the most popular locations of Washington State on the map below. Detailed insights are just a click away.

Select a Month

Check the conditions for any month of the year.

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For a detailed overview over the year and the best time to visit Washington State, check out our Washington State's climate page.

See also: Washington State weather by month.

Best Places to Visit in Washington State in May

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Washington State.

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in May: blue is cold, red is hot.

See all May weather averages, cities and regions in Washington State

Washington State temperatures in May: frequently asked questions

How hot does it get in Washington State, the United States of America in May?

Seattle averages a daytime high of 19°C (66°F) in May, which is pleasant for Washington State, the United States of America.

How cold does it get at night in Washington State, the United States of America in May?

Nighttime temperatures in Seattle typically drop to around 9°C (48°F) in May.

What is the warmest city in May in Washington State, the United States of America?

Kennewick tops the warmest city list in our database with average maximum daytime temperatures around 24°C (75°F) and a minimum nighttime temperature of around 9°C (48°F).

What is the coldest city in May in Washington State, the United States of America?

For the month of May, Mount Rainier National Park is the most temperate city in Washington State, the United States of America based on our records. Highs average 3°C (37°F) and nighttime temperatures dip to around -8°C (18°F).

How much sun does Washington State, the United States of America get in May?

Seattle enjoys close to 254 hours of sunlight. This not only brightens the days but also uplifts the atmosphere during the month.

Interested in more climate information?

We have much more information about the climate in Washington State.

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