Washington Weather in May
May in Washington sees daytime temperatures around 25°C (77°F) and lows of 12°C (54°F) at night. As the wettest month of the year, keep in mind that rainfall is at its highest.
Rainfall in Washington in May
Given that this is the rainiest month, it's wise to carry an umbrella to stay dry during unexpected showers. Expect around 15 days of rain based on historical data, with 126 mm (5 in) average. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Washington in May
Expect highs of 25°C (77°F) in Washington in May, with nights dropping to around 12°C (54°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 12°C (54°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Washington in May
There are approximately 269 hours of sunshine this month, resulting in mostly clear days.If you prefer enjoying temperate temperatures and rain-free days, October typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Washington's climate page.
Washington Temperature in May
Min Temperature
12°C (54°F)
Max Temperature
25°C (77°F)
Chance of Rain
50%
Precipitation
126 mm (5 in)
Rainy days
15 days
Humidity
65% *
Sunshine
269 hours *
Percentage Sunshine
60% *
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
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What to Wear in Washington in May
For Washington in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Washington in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Washington's climate page.
Temperature Rainfall Sunshine Humidity
See the full Washington climate overview or explore weather in the United States of America.
