Avg High
Seattle in May
Verdict
In Seattle, May has a distinct spring feel. As the season moves along, temperatures are climbing noticeably. You can usually expect a mild month that feels variable day to day. Breezes can be part of the character, especially in exposed spots.
It suits travellers who want straightforward weather for sightseeing and day trips. Lookouts and coastal walks can feel sharper when the wind is up.
Avg Low
Rain
Daylight
15h
What to expect
- Temperature feel - Easygoing temperatures with a noticeable cool-down after sunset. Breezes and shade can make it feel cooler.
- Rain pattern - Frequent rain spells. Expect damp surfaces and slick paths. Rain can be part of the daily rhythm.
- Midday sun - Sun protection matters. Cloud cover doesn't always mean low UV, so still protect your skin. Shade breaks feel genuinely worthwhile.
- Wind feel - Often breezy, and gusts can catch you in exposed spots. Sheltered streets can feel fine, but open areas feel very different.
May in context
How it compares to the rest of the year in Seattle.
Hottest (avg)
#5 / 12
Wettest (avg)
#8 / 12
Daylight Hours
#3 / 12
Windiest (avg)
#8 / 12
Highest UV
#3 / 12
Most Humid
#9 / 12
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight
- 15.2 hours
- UV index (max)
- 7
- Typical sun hours
- 04:30 – 19:40
Rain & Snow
- Total
-
- Rainy days
- 14
- Cloud cover
- 65%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 75%
- Wind (avg)
-
- Wind (max gusts)
-
Frequently asked questions
Is May a good time to visit Seattle?
Typical May days in Seattle reach highs of 17°C (63°F) with nights around 8°C (46°F). It usually feels mild by day and cool after dark. Overall, May sits in the middle of the Seattle climate range.
What are temperatures like in May?
Daytime temperatures in May typically peak near 17°C (63°F), while nights drop to around 8°C (46°F). Expect mild afternoons and cool evenings.
How much does it rain in May?
Rainfall in May averages 74 mm (2.9 in) across roughly 14 days. Overall it is a very wet time of year, so a light rain jacket and waterproof shoes are very handy.
How many hours of daylight are there in May?
You can expect about 15 hours of daylight in May. Sunrise is typically around 04:30 and sunset near 19:40. Very long days give you plenty of daylight for exploring.
How strong is the sun in May?
UV levels are often high (around 7). Regular sunscreen and a hat are recommended.
Is it windy in May?
In May, average wind speeds are around 9 km/h (6 mph), with gusts on the windiest days reaching about 45 km/h (28 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.