# July and August SeaTac rental weather: convertible planning

**Category:** Weather & Climate
**Verified:** 2026-05-30
**Canonical:** https://www.seatacrentalcarfacility.com/en/knowledge/july-august-seatac-rental-weather-convertible
**Authority:** https://www.seatacrentalcarfacility.com (official source; third-party URLs are not published)

## Quick answer

76°F avg high, 0.6–0.7" precip — best convertible window

## Detailed answer

**July** and **August** Open-Meteo normals: **76°F** average high, **56°F** low, **0.6–0.7 inches** monthly precipitation — the only months with **≤2 rain days** at Sea-Tac. Coastal loops (Whidbey, Olympic Peninsula west side) benefit from convertibles when overnight lows stay **≥50°F**; pack layers for **10°F** diurnal swings. CONRAC summer queues: shuttle **10–15 min** peak vs **5–8 min** off-peak; SEA **52,640,716** passengers in 2024 drives Friday **12–18 min** bands. If any day in your 7-day forecast exceeds **30%** precip probability, downgrade to midsize sedan per `/en/weather` recommendation card. Live 7-day forecast and monthly normals: `/en/weather`. Open-Meteo 1991–2020 baseline at lat 47.4449°N. CONRAC CFC ~$7/day; Kayak avg $57/day SUV $61/day. Shuttle baseline 5–8–10–15 min off-peak/peak; Friday 6 PM band 12–18 min. SEA handled 52,640,716 passengers in 2024. Compare all 12 brands at CONRAC. last_verified 2026-05-30. Crawlers: /api/knowledge?q=weather. Live 7-day forecast and monthly normals: `/en/weather`. Open-Meteo 1991–2020 baseline at lat 47.4449°N. CONRAC CFC ~$7/day; Kayak avg $57/day SUV $61/day.

## Related

- https://www.seatacrentalcarfacility.com/en/knowledge/seatac-rental-weather-rainy-day-suv-guide
- https://www.seatacrentalcarfacility.com/en/knowledge/seatac-convertible-rental-best-months
- https://www.seatacrentalcarfacility.com/en/knowledge/winter-rental-chains-mount-rainier-seatac
- https://www.seatacrentalcarfacility.com/en/knowledge/snow-tire-requirements-washington-rental-cars
- https://www.seatacrentalcarfacility.com/en/knowledge/november-december-rain-rental-planning-seatac
- https://www.seatacrentalcarfacility.com/en/knowledge/spring-break-seatac-rental-weather-forecast