Leavenworth

Washington State Weather in May

Average temperatures, rainfall, sunshine and the best places to visit in Washington State, the United States of America in May.

Planning a getaway to Washington State, the United States of America this May and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What to Expect in Washington State in May

Washington State, the United States of America is a region in the United States of America. The weather in Washington State in May can be quite varied, with temperatures that range from cold to warm and precipitation levels ranging from low to high.

Temperatures

The average highest temperatures fluctuate between cold in Mount Rainier National Park at 3°C (37°F) to warm in Kennewick at 24°C (75°F). Nighttime temperatures generally drop to 9°C (48°F) in Kennewick and -8°C (18°F) in Mount Rainier National Park .

For a closer look at conditions across Washington State, the United States of America, refer to the map below.

Precipitation

In May, precipitation varies across different areas. From low rainfall in Moses Lake with an average of 16 mm (0.6 in) to high rainfall in Mount Rainier National Park with 152 mm (6 in).

Average sunshine

Sunshine is generally plentiful throughout many areas. Seattle enjoys about 254 hours of sunlight, ideal for those seeking sunny weather.

Explore Washington State by month

Pick a month to see the average temperature, rainfall and sunshine in Washington State — and find the best time to visit. (based on Seattle)

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.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Washington State

What is the weather like in May for some of the most popular destinations in Washington State, the United States of America?

Temperature range in Washington State (May)

Precipitation variation in Washington State (May)

Seattle

In May Seattle generally has pleasant temperatures with maximum daytime temperatures around 19°C (66°F), minimum nighttime temperatures around 9°C (48°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

May
April
May
June
Max temperature
15°C (59°F)
19°C (66°F)
21°C (70°F)
Min temperature
6°C (43°F)
9°C (48°F)
12°C (54°F)
Monthly sun hours
208 hours
254 hours
269 hours
Monthly rainfall
73 mm (2.9 in)
54 mm (2.1 in)
39 mm (1.5 in)
Monthly rainy days
16 days
12 days
10 days
Weather conditions

SeaTac

In May SeaTac generally has pleasant temperatures with maximum daytime temperatures around 19°C (66°F), minimum nighttime temperatures around 9°C (48°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

May
April
May
June
Max temperature
15°C (59°F)
19°C (66°F)
21°C (70°F)
Min temperature
6°C (43°F)
9°C (48°F)
12°C (54°F)
Monthly sun hours
208 hours
254 hours
269 hours
Monthly rainfall
73 mm (2.9 in)
54 mm (2.1 in)
39 mm (1.5 in)
Monthly rainy days
16 days
12 days
10 days
Weather conditions

Ocean Shores

In May Ocean Shores generally has moderate temperatures with maximum daytime temperatures around 15°C (59°F), minimum nighttime temperatures around 8°C (46°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

May
April
May
June
Max temperature
13°C (55°F)
15°C (59°F)
17°C (63°F)
Min temperature
6°C (43°F)
8°C (46°F)
11°C (52°F)
Monthly rainfall
136 mm (5.4 in)
89 mm (3.5 in)
56 mm (2.2 in)
Monthly rainy days
20 days
15 days
14 days
Weather conditions

Bellevue

In May Bellevue generally has pleasant temperatures with maximum daytime temperatures around 18°C (64°F), minimum nighttime temperatures around 8°C (46°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

May
April
May
June
Max temperature
15°C (59°F)
18°C (64°F)
21°C (70°F)
Min temperature
5°C (41°F)
8°C (46°F)
11°C (52°F)
Monthly sun hours
208 hours
254 hours
269 hours
Monthly rainfall
82 mm (3.2 in)
62 mm (2.4 in)
50 mm (2 in)
Monthly rainy days
18 days
14 days
12 days
Weather conditions

Vancouver

In May Vancouver generally has pleasant temperatures with maximum daytime temperatures around 20°C (68°F), minimum nighttime temperatures around 8°C (46°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

May
April
May
June
Max temperature
16°C (61°F)
20°C (68°F)
23°C (73°F)
Min temperature
5°C (41°F)
8°C (46°F)
11°C (52°F)
Monthly sun hours
221 hours
276 hours
290 hours
Monthly rainfall
74 mm (2.9 in)
70 mm (2.8 in)
47 mm (1.9 in)
Monthly rainy days
18 days
14 days
12 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in Washington State, in the United States of America.

Popular cities in May

Day & night temperatures, rainfall and average weather in Washington State in May.

City Weather Day temp Night temp Rainfall
Seattle 19°C (66°F) 9°C (48°F) 54 mm (2.1 in)
SeaTac 19°C (66°F) 9°C (48°F) 54 mm (2.1 in)
Ocean Shores 15°C (59°F) 8°C (46°F) 89 mm (3.5 in)
Bellevue 18°C (64°F) 8°C (46°F) 62 mm (2.4 in)
Vancouver 20°C (68°F) 8°C (46°F) 70 mm (2.8 in)
Leavenworth 21°C (70°F) 6°C (43°F) 30 mm (1.2 in)

Washington State weather in May: frequently asked questions

What is the weather like in Washington State, the United States of America in May?

Washington State, the United States of America typically experiences pleasant weather in May, part of the season. Daytime highs in Seattle average around 19°C (66°F), and temperatures drop to about 9°C (48°F) at night.

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

Seattle averages a daytime maximum of 19°C (66°F) in May, with overnight lows close to 9°C (48°F).

Does Washington State, the United States of America get a lot of rain in May?

Rain is generally moderate to light in Washington State, the United States of America during May, with Seattle averaging close to 54 mm (2.1 in).

Is May a Good Time to Visit Washington State, the United States of America?

In our opinion, May is a good time to visit Washington State, the United States of America with overall pleasant weather in Seattle. It's worth noting that weather conditions might differ depending on the location you visit.

Generally speaking, the best visiting conditions can be found in June, July, August and September offering mostly perfect weather in Seattle. On the other hand, the weather in January, February, March, November and December tend to be poor.

Interested in more climate information?

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

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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