Washington State Weather by Month: Temperature & Rainfall Guide

Washington State is a region in the United States of America. Many people wonder what the weather conditions are in Washington State over the year. What is the best time to visit Washington State?

This page shows the average weather conditions by month in Washington State over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

Washington State in January

In January the weather in Washington State is generally less favorable. January is a winter month. The temperatures range from very low in Mount Rainier National Park with -5°C (23°F) to low in Ocean Park with 10°C (50°F).

Find more detailed climate information for Washington State in January here.

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).

Washington State in February

In February the weather in Washington State ranges from less favorable in Seattle to mixed in Vancouver. February is a winter month. The temperatures range from very low in Mount Rainier National Park with -5°C (23°F) to low in Vancouver with 11°C (52°F).

Find more detailed climate information for Washington State in February here.

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).

Washington State in March

In March the weather in Washington State ranges from less favorable in Seattle to good in Wenatchee. The temperatures range from very low in Mount Rainier National Park with -4°C (25°F) to moderate in Pasco with 15°C (59°F).

Find more detailed climate information for Washington State in March here.

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).

Washington State in April

In April the weather in Washington State ranges from less favorable in Ocean Shores to very good in Leavenworth. The temperatures range from very low in Mount Rainier National Park with -2°C (28°F) to pleasant in Kennewick with 19°C (66°F).

Find more detailed climate information for Washington State in April here.

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).

Washington State in May

In May the weather in Washington State ranges from mixed in Long Beach to excellent in Vancouver. The temperatures range from low in Mount Rainier National Park with 3°C (37°F) to high in Kennewick with 24°C (75°F).

Find more detailed climate information for Washington State in May here.

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).

Washington State in June

In June the weather in Washington State ranges from good in Ocean Shores to excellent in Seattle. The temperatures range from low in Mount Rainier National Park with 6°C (43°F) to high in Pasco with 28°C (82°F).

Find more detailed climate information for Washington State in June here.

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).

Washington State in July

In July the weather in Washington State is generally excellent. July is a summer month. The temperatures range from low in Mount Rainier National Park with 11°C (52°F) to very high in Pasco with 33°C (91°F). On average, this month is one of the warmest months of the year in Washington State. So be prepared and make sure to dress lightly.

Find more detailed climate information for Washington State in July here.

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).

Washington State in August

In August the weather in Washington State ranges from very good in Ocean Shores to excellent in Seattle. August is a summer month. The temperatures range from low in Mount Rainier National Park with 11°C (52°F) to very high in Pasco with 32°C (90°F). On average, this month is one of the warmest months of the year in Washington State. So be prepared and make sure to dress lightly.

Find more detailed climate information for Washington State in August here.

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).

Washington State in September

In September the weather in Washington State ranges from very good in Ocean Shores to excellent in Seattle. September is a summer month. The temperatures range from low in Mount Rainier National Park with 8°C (46°F) to high in Pasco with 27°C (81°F).

Find more detailed climate information for Washington State in September here.

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).

Washington State in October

In October the weather in Washington State ranges from less favorable in Ocean Shores to very good in Vancouver. The temperatures range from low in Mount Rainier National Park with 3°C (37°F) to pleasant in Kennewick with 19°C (66°F).

Find more detailed climate information for Washington State in October here.

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).

Washington State in November

In November the weather in Washington State is generally less favorable. The temperatures range from very low in Mount Rainier National Park with -4°C (25°F) to low in Vancouver with 12°C (54°F).

Find more detailed climate information for Washington State in November here.

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).

Washington State in December

In December the weather in Washington State is generally less favorable. December is a winter month. The temperatures range from very low in Mount Rainier National Park with -6°C (21°F) to low in Ilwaco with 9°C (48°F). On average, this month is the coldest month of the year in Washington State.

Find more detailed climate information for Washington State in December here.

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).

Top destinations

More climate information for the top 5 destinations in Washington State:

Bucket list

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