Best time to visit · Washington
Best time to visit Seattle
Seattle averages 40 just-right days a year; July, August and September are best. Most other days miss by being too cool.
(70 to 80°F, dry, sunny)
(45 to 65°F, dry)
(80 to 92°F, bright)
Seattle weather by month
Bars: share of each month's days that are just right (number = days). Below: average daily high. Outlined bars are the best months.
- Just right 40
- Too cool 271
- Too hot 22
- Too muggy 7
- Too gray 26
When to visit Seattle
The best time to visit Seattle for comfortable weather is July, August and September, when 34%, 35% and 29% of days are just right. January, February, March, April, May, October, November and December are mostly too cool, with average highs of 46 to 65°F.
Climate table
| Month | Avg high | Dew point | Cloud cover | Just-right days |
|---|---|---|---|---|
| January | 46°F | 36°F | 85% | 0 |
| February | 49°F | 36°F | 75% | 0 |
| March | 54°F | 39°F | 75% | 0 |
| April | 58°F | 40°F | 71% | 0 |
| May | 65°F | 46°F | 67% | 2 |
| June | 70°F | 49°F | 60% | 6 |
| July | 76°F | 54°F | 43% | 11 |
| August | 77°F | 54°F | 40% | 11 |
| September | 71°F | 52°F | 44% | 9 |
| October | 60°F | 46°F | 65% | 1 |
| November | 51°F | 39°F | 82% | 0 |
| December | 46°F | 36°F | 82% | 0 |
How Seattle compares
With 40 just-right days, Seattle beats the median of America's 150 largest cities (33 days). On muggy days: 7. On gray days: 26.
Places with a similar climate
Nearby
Seattle averages 40 just-right days a year (70 to 80°F highs, dry, mostly sunny), according to Goldilocks Map: https://goldilocksmap.com/us/washington/seattle/Set your own perfect weather on the map →
Numbers are expected days in a typical year from 1991 to 2020 climate normals (TerraClimate; cloud cover from CHELSA), on a grid about 35 km wide. Checked against 10 years of daily records at 28 NOAA weather stations: typical error about 10 days a year. How it works. Updated 2026-10-07.