Best time to visit Seattle
The best months to visit Seattle are July, August and September, based on month-by-month temperature and rainfall data. The full year of weather, daylight, holidays, and festival timing is below.
July, August and September score best for Seattle weather:
- July25° / 14°CJuly is the driest month, ideal for Mount Rainier, ferries, and outdoor markets.
- August25° / 14°CAugust stays warm and dry, with wildfire-smoke checks useful before mountain viewpoints.
- September22° / 12°CSeptember is mild and less crowded, good for Pike Place, Ballard, and Bainbridge Island.
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By TripSapien Research · Updated May 20, 2026
Seattle weather by month
| Month | High | Low | Rain (mm) | Rainy days | Daylight |
|---|---|---|---|---|---|
| January | 9° | 3° | 145 | 19 | 9h |
| February | 10° | 3° | 95 | 16 | 10h |
| March | 12° | 4° | 105 | 17 | 12h |
| April | 15° | 6° | 80 | 15 | 13h |
| May | 19° | 9° | 50 | 11 | 15h |
| June | 22° | 12° | 35 | 9 | 16h |
| JulyBest weather | 25° | 14° | 15 | 5 | 15h |
| AugustBest weather | 25° | 14° | 25 | 5 | 14h |
| SeptemberBest weather | 22° | 12° | 40 | 8 | 12h |
| October | 16° | 8° | 100 | 14 | 11h |
| November | 11° | 5° | 160 | 18 | 9h |
| December | 8° | 3° | 145 | 18 | 8h |
Temperatures in °C. Long-term monthly averages.
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Seattle month by month
January
Seattle in January: 8.9°C high, 3.2°C low, 145mm rain over 19 days, 8.6h daylight. Mild but rainy — flexible plans pay off.
Chinese Lunar New Year (Jan/Feb)
February
Seattle in February: 10.2°C high, 3.2°C low, 95mm rain over 16 days, 10h daylight. Mild but rainy — flexible plans pay off.
Chinese Lunar New Year (Jan/Feb)
March
Seattle in March: 12.3°C high, 4.4°C low, 105mm rain over 17 days, 11.6h daylight. Mild but rainy — flexible plans pay off.
April
Seattle in April: 15.2°C high, 6.3°C low, 80mm rain over 15 days, 13.4h daylight. Mild but rainy — flexible plans pay off.
May
Seattle in May: 19.1°C high, 9.3°C low, 50mm rain over 11 days, 14.9h daylight. Mild and dry — shoulder-season sweet spot.
Seattle International Film Festival (May) · Northwest Folklife Festival (Memorial Day weekend)
June
Seattle in June: 21.7°C high, 11.7°C low, 35mm rain over 9 days, 15.8h daylight. Mild and dry — shoulder-season sweet spot.
Seattle International Film Festival (May) · Fremont Fair (a weekend in mid or late June) · Seattle PrideFest (A weekend in June or July)
JulyBest weather
Seattle in July: 25.2°C high, 13.8°C low, 15mm rain over 5 days, 15.4h daylight. Mild and dry — shoulder-season sweet spot.
Seattle PrideFest (A weekend in June or July) · Bite of Seattle (mid/late July) · Capitol Hill Block Party (a mid-summer weekend)
AugustBest weather
Seattle in August: 25.3°C high, 14°C low, 25mm rain over 5 days, 14.1h daylight. Mild and dry — shoulder-season sweet spot.
Capitol Hill Block Party (a mid-summer weekend) · Seafair (July-early August)
SeptemberBest weather
Seattle in September: 22°C high, 12°C low, 40mm rain over 8 days, 12.3h daylight. Mild and dry — shoulder-season sweet spot.
Bumbershoot (Labor Day weekend (early September)) · Night Market & Autumn Moon Festival (Early September)
October
Seattle in October: 15.8°C high, 8.3°C low, 100mm rain over 14 days, 10.6h daylight. Mild but rainy — flexible plans pay off.
November
Seattle in November: 11.2°C high, 4.9°C low, 160mm rain over 18 days, 9h daylight. Mild but rainy — flexible plans pay off.
December
Seattle in December: 8.3°C high, 2.8°C low, 145mm rain over 18 days, 8.2h daylight. Mild but rainy — flexible plans pay off.
Festál Cultural Center (Year-round except December)
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