Seattle, Washington Weather in May
United States · May climate averages and travel tips
Avg high18°C (64°F)
Avg low8°C (47°F)
Rainfall73 mm (2.9 in)
RatingGood 7.6/10
In May, Seattle has average highs of 18°C (64°F) and lows of 8°C (47°F). May is spring in United States. The month is moderately rainy, with about 73 mm (2.9 in) of rain spread over 13 days. You get roughly 14.9 hours of daylight and frequently cloudy skies.
Is May a good time to visit Seattle?
May is a good time to visit Seattle (7.6/10), though June to September are even better.
May weather at a glance
| Average high | 18°C (64°F) |
|---|---|
| Average low | 8°C (47°F) |
| Daily mean | 13°C (55°F) |
| Rainfall | 73 mm (2.9 in) |
| Rainy days (1 mm+) | 13 |
| Humidity | 80% |
| Cloud cover | 69% |
| Daylight | 14.9 hours |
| Est. sunshine | 5.1 hours/day |
| Wind | 2.2 km/h |
| vs April | 4°C warmer than April, with 25 mm less rain. |
What to pack for Seattle in May
- a warm jacket and layers
- an umbrella or rain jacket
Seattle weather in other months
Jan7°C / 2°C178 mmPoorFeb8°C / 2°C117 mmPoorMar11°C / 3°C133 mmPoorApr13°C / 5°C98 mmPoorMay18°C / 8°C73 mmGoodJun20°C / 11°C57 mmExcellentJul23°C / 13°C19 mmExcellentAug24°C / 13°C25 mmExcellentSep21°C / 11°C62 mmExcellentOct15°C / 8°C125 mmFairNov10°C / 4°C196 mmPoorDec7°C / 2°C184 mmPoor
← AprilBest time to visit SeattleJune →
Better weather in May nearby
- Los Angeles, California25°C · 8 mm · Excellent
- Cabo San Lucas28°C · 1 mm · Excellent
- San Diego, California24°C · 8 mm · Excellent
- San Francisco, California19°C · 18 mm · Excellent
- Tijuana24°C · 8 mm · Excellent
- Denver, Colorado23°C · 65 mm · Excellent
Nearby in May
- Victoria15°C · 53 mm
- Vancouver16°C · 62 mm
- Calgary17°C · 79 mm
- Edmonton17°C · 67 mm
- San Francisco, California19°C · 18 mm
- Las Vegas, Nevada32°C · 4 mm
Where else is good in May? See where to go in May.