Seattle weather in May
Seattle in May averages 14°C (57°F) and 48 mm of rain.
Of the twelve months in Seattle, May is the fifth warmest and the fifth driest.
- Average temp
- 14°C (57°F)
9–19°C · 48–65°F
- Rainfall
- 48 mm
Not much rain
- Sunshine
- —
- Wind
- 12 km/h
What is Seattle like in May?
Daytime
Days are mild.
Rain
Rain is usually light.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Seattle in May?
A warm mid-layer
Nights drop to around 9°C (48°F).
May compared with April and June
May in Seattle is 3.4°C warmer than April and 33 mm drier than it, which averages 10°C (51°F).
May in Seattle is 2.6°C cooler than June and 12 mm wetter than it, which averages 16°C (62°F).
Daylight in Seattle in May
On 15 May the sun is up for 15 hours 10 minutes in Seattle, rising about 05:31 and setting about 20:41 local time.
May ends 1 hour 12 minutes longer than it begins, so the last week of the month is a different length of day from the first.
That is 48 minutes short of June, the longest-lit month here.
Where to stay in Seattle
Dates are a starting point for May.
Travel guides for Seattle
What to read before you book.
Seattle weather by month
TemperatureRainfall
How May compares with the rest of the year
May is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 6°C / 42°F | 147 mm |
| February | 6°C / 43°F | 96 mm |
| March | 8°C / 46°F | 106 mm |
| April | 10°C / 51°F | 81 mm |
| May | 14°C / 57°F | 48 mm |
| June | 16°C / 62°F | 37 mm |
| July | 19°C / 67°F | 15 mm |
| August | 19°C / 67°F | 25 mm |
| September | 17°C / 62°F | 41 mm |
| October | 12°C / 53°F | 99 mm |
| November | 8°C / 46°F | 160 mm |
| December | 5°C / 41°F | 147 mm |
Check another month
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FAQs about Seattle in May
May climate averages for Seattle, 1991–2020.
Seattle averages 14°C (57°F) in May, ranging from about 9°C (48°F) at night to 19°C (65°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Barely. May sees only about 48 mm, so rain is unlikely to affect your plans.
No. May averages 14°C (57°F) against 16°C (62°F) in June — 2.6°C cooler.
May is 3.4°C warmer than April, and 33 mm drier.
Yes. May falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what May is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 15 hours 10 minutes of daylight in mid-May, against 15 hours 58 minutes in June and 8 hours 27 minutes in December.
On 15 May, sunrise is about 05:31 and sunset about 20:41 local time. Both shift across the month — the month ends 1 hour 12 minutes longer than it starts.
