United States · North America
What to Wear in Seattle
Month-by-month temperatures, rainfall, and clothing recommendations for Seattle, United States. Find out what to pack for every season.
Warmest month
August
25°C / 77°F
Coolest month
December
7°C / 45°F
Wettest month
November
152 mm
Best months
May, June, July
Monthly climate & clothing guide
| Month | High | Low | Rain | Humidity | Climate |
|---|---|---|---|---|---|
| January | 8°C / 46°F | 3°C / 37°F | 140 mm | high | Cold |
| February | 10°C / 50°F | 3°C / 37°F | 89 mm | high | Cool |
| March | 12°C / 54°F | 4°C / 39°F | 94 mm | moderate | Cool |
| April | 15°C / 59°F | 6°C / 43°F | 69 mm | moderate | Cool |
| May | 18°C / 64°F | 9°C / 48°F | 49 mm | moderate | Mild |
| June | 21°C / 70°F | 12°C / 54°F | 37 mm | moderate | Mild |
| July | 24°C / 75°F | 14°C / 57°F | 18 mm | low | Mild |
| August | 25°C / 77°F | 14°C / 57°F | 22 mm | low | Warm |
| September | 21°C / 70°F | 12°C / 54°F | 38 mm | moderate | Mild |
| October | 15°C / 59°F | 8°C / 46°F | 89 mm | high | Cool |
| November | 10°C / 50°F | 4°C / 39°F | 152 mm | high | Cool |
| December | 7°C / 45°F | 2°C / 36°F | 140 mm | high | Cold |
Seasonal clothing guide for Seattle
Winter (Dec-Feb)
ColdAverage highs 8°C (46°F), lows 3°C (37°F). Total seasonal rainfall: 369 mm.
Full winter layering required. Multiple insulating layers, a weatherproof outer shell, and warm accessories are essential for comfort.
Spring (Mar-May)
CoolAverage highs 15°C (59°F), lows 6°C (43°F). Total seasonal rainfall: 212 mm.
Jacket weather. A proper 3-layer system with insulation keeps you comfortable during full days outdoors. Mornings and evenings need extra warmth.
Summer (Jun-Aug)
MildAverage highs 23°C (73°F), lows 13°C (55°F). Total seasonal rainfall: 77 mm.
Spring and fall conditions — comfortable but changeable. A light layering system handles temperature swings between morning, midday, and evening.
Fall (Sep-Nov)
CoolAverage highs 15°C (59°F), lows 8°C (46°F). Total seasonal rainfall: 279 mm.
Jacket weather. A proper 3-layer system with insulation keeps you comfortable during full days outdoors. Mornings and evenings need extra warmth.
FAQ
What should I wear when visiting Seattle?
What to wear in Seattle depends on the month. The warmest month is August (avg high 25°C / 77°F) and the coldest is December (avg high 7°C / 45°F). Check the month-by-month table above for specific clothing recommendations.
What is the best time to visit Seattle?
For comfortable weather and easy packing, the best months to visit Seattle are May, June, July, August, September. These months have mild to warm temperatures with manageable rainfall.
Does it rain a lot in Seattle?
The wettest month in Seattle is November with an average of 152 mm of rainfall. A packable rain jacket is essential during the wet season.
Do I need warm clothes for Seattle?
Yes. Seattle's coldest month is December with average highs of 7°C (45°F). You will need a proper layering system with insulation if visiting during the cooler months.
Ready to pack for Seattle?
Use our interactive tool to compare climates and get layering advice.
Open Climate Calendar