Using this Seattle C3® CityPASS®, I visited the Space Needle, the Museum of Pop Culture, and Chihuly Gardens of Glass, saving over NTD 1,000 in total. In Seattle, where the cost of living and taxes are relatively high, this discount is quite significant. With flexible choices of attractions, a flexible itinerary, and a generous validity period, it's highly recommended overall.
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Seattle Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Seattle year round climate
Spring (March–May): Average 7.9–13.7°C, mild and rainy with occasional sunshine. March and April still experience rainfall; May becomes drier. Common activities: Hiking, exploring city parks, visiting museums. Recommended clothing: Light jacket, comfortable pants or jeans, waterproof jacket.
Summer (June–August): Average 16.5–20.6°C, warm and pleasant, but occasional overcast skies and showers; sunny days offer warm and comfortable weather. July and August have less rainfall. Common activities: Hiking, water activities, visiting Pike Place Market. Recommended clothing: Light and breathable clothing, short-sleeved shirts, comfortable shoes.
Autumn (September–November): Average 12.7–17.1°C, cool and rainy with gradually decreasing temperatures. October and November have more rainfall; prepare for rain. Common activities: Leaf peeping, visiting art museums, enjoying seafood. Recommended clothing: Warm jacket, long-sleeved shirts, waterproof jacket, comfortable shoes.
Winter (December–February): Average 5.5–6.0°C, cold and damp with significant rainfall. December has the most rainfall; prepare for warmth and rain. Common activities: Indoor activities, museum visits, enjoying coffee shops. Recommended clothing: Warm coat, sweater, waterproof jacket, warm hat, scarf, and gloves.
Seattle climatological average
Annual average temperature: approx. 11.9°C / Annual rainfall: approx. 908 mm / Summer humidity: 65%–75% / Rainiest month: December
Seattle monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
5.5°C
139.7
February
5.9°C
97.7
March
7.9°C
69.7
April
9.5°C
63.3
May
13.7°C
53.3
June
16.5°C
43
July
20.6°C
3.7
August
20.4°C
16.7
September
17.1°C
36.3
October
12.7°C
71.3
November
6.8°C
131
December
6°C
182.3
Seattle weather for the next seven days
12/28
Sunday
Sunny
8.3°C/1°C
12/29
Monday
Mist
4°C/-1.2°C
12/30
Tuesday
Mist
4.5°C/-0.3°C
12/31
Wednesday
Sunny
7.5°C/2.1°C
1/1
Thursday
Partly Cloudy
7.1°C/3°C
1/2
Friday
Patchy rain nearby
10.2°C/4.5°C
1/3
Saturday
Patchy rain nearby
5.7°C/3.2°C
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