Seattle in August
8.4out of 10
Yes, a good time to go
Warm and comfortable: highs around 25°C. Some rain: about 5 rainy days.
25°CAvg high
14°CAvg low
5Rainy days (32 mm)
14:05 hDaylight
06:11Sunrise · 20:16 Sunset
Why this score
- Warm and comfortable: highs around 25°C
- Some rain: about 5 rainy days
What to wear and pack
- T-shirts and light layers
How reliable is the forecast?
Rainfall in August is fairly consistent from year to year (3.0 days). Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 8°C | 4°C | 176 mm | 18 | – | – | 4.0 |
| February | 10°C | 4°C | 122 mm | 14 | – | – | 5.0 |
| March | 12°C | 5°C | 139 mm | 17 | – | – | 4.9 |
| April | 15°C | 7°C | 114 mm | 16 | – | – | 5.6 |
| May | 18°C | 10°C | 76 mm | 13 | – | – | 6.8 |
| June | 21°C | 12°C | 60 mm | 10 | – | – | 7.6 |
| July | 25°C | 14°C | 25 mm | 5 | – | – | 8.4 |
| August | 25°C | 14°C | 32 mm | 5 | – | – | 8.4 |
| September | 22°C | 12°C | 67 mm | 8 | – | – | 7.9 |
| October | 16°C | 9°C | 134 mm | 15 | – | – | 5.9 |
| November | 11°C | 6°C | 192 mm | 18 | – | – | 4.3 |
| December | 8°C | 4°C | 178 mm | 18 | – | – | 4.0 |
Frequently asked questions
How hot is Seattle in August?
Daytime highs average 25°C and nights about 14°C.
When is the best time to visit Seattle?
The best months are July, August, September.