Seattle · SummerMonth summary
Seattle weather in August
✅ Good
🌡️ Temperature min / max
15°C – 24°C
🌧 Rainy days
16% of days
☀️ Sunshine
12.9h per day on average
🌊 🌊 Season
Summer
⭐ ⭐ Weather score
8.7/10
📅 📅 Best month
July (9.2/10)
Quick decision
Should you visit Seattle in August?
✅ Good
✅ Yes if: you want long sunny days and outdoor activities.
❌ No if: you want to avoid summer crowds — this is peak tourist season.
Our take: Seattle in August: 24°C and 12.9h of sunshine. Decent, but not the peak.
By trip type
Seattle in August by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : ⚠️ Possible
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in August
🎯 Peak cultural season — museums and sites accessible in good weather conditions Summer in Seattle brings pleasant temperatures (24°C) and long sunny days (12.9h of sunshine). Rain risk remains low (16% of days), leaving good room for outdoor activities. A good balance between weather and crowds, even if July (9.2/10) remains theoretically better.
Browse by month
All months for Seattle
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌦️ January | 3°C | 8°C | 58% | 5.7 | 4.3h | 1.7/10 |
| 🌦️ February | 2°C | 8°C | 55% | 4.4 | 5.5h | 2.5/10 |
| 🌦️ March | 4°C | 11°C | 52% | 3.5 | 8.4h | 4.2/10 |
| 🌦️ April | 6°C | 13°C | 47% | 2.8 | 10.4h | 5.3/10 |
| 🌤️ May | 9°C | 18°C | 35% | 1.8 | 11.9h | 7.2/10 |
| 🌤️ June | 12°C | 20°C | 28% | 1.7 | 13.0h | 7.7/10 |
| 🌤️ July | 14°C | 24°C | 11% | 0.4 | 14.5h | 9.2/10 |
| 🌤️ August | 15°C | 24°C | 16% | 0.8 | 12.9h | 8.7/10 |
| 🌤️ September | 13°C | 20°C | 31% | 2.1 | 10.3h | 7.4/10 |
| 🌦️ October | 9°C | 15°C | 45% | 4.0 | 7.5h | 5.0/10 |
| 🌦️ November | 6°C | 10°C | 59% | 5.6 | 4.7h | 2.3/10 |
| 🌦️ December | 3°C | 8°C | 60% | 5.9 | 3.5h | 1.4/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In August, Seattle averages 24°C, 16% rainy days and 12.9h of sunshine per day. Overall weather score: 8.7/10.
See methodology →
Comparison
August vs July (best month)
The best month is July (score 9.2/10). Difference:
- 🌡️ Max temperature : +0°C
- 🌧 Rainy days : -5%
- ☀️ Sunshine : +1.6h/day
FAQ
FAQ — Seattle in August
Is August a good time to visit Seattle?
August is an excellent time to visit Seattle (score 8.7/10). With 24°C, 12.9h of sunshine and 16% rain, conditions are very favourable.
What to do in Seattle in August?
With 24°C and 12.9h of sunshine, all outdoor activities are possible: hiking, sightseeing and terraces.
Accommodation
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Activities & tours
Activities and tours in Seattle
Guided tours, skip-the-line tickets and local experiences.
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