{"version":"2.6","id":"seatac-convertible-rental-best-months","question":"Best months to rent a convertible at SeaTac (Open-Meteo normals)","answer":"July-August: 76°F highs, ≤2 rain days/month","answer_detail":"Open-Meteo **1991-2020** normals show **July** and **August** as the driest window: highs **76°F**, lows **56°F**, only **~2 rain days** and **0.6-0.7 inches** precip each month at 47.4449°N. Our forecast engine flags convertible-friendly windows when all 7 days show precip probability **≤30%**, mins **≥50°F**, and no snow codes - typical mid-June through August. Avoid November-January (**17 rain days**, highs **46-51°F**). Kayak does not break out convertible class; budget **+$15-25/day** over midsize at CONRAC counters. Book **72 hours** ahead in July when SEA enplanements exceed **5.48 million** in peak months. 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.  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.","grokpedia_tier":false,"related_ids":["seatac-rental-weather-rainy-day-suv-guide","winter-rental-chains-mount-rainier-seatac","snow-tire-requirements-washington-rental-cars","july-august-seatac-rental-weather-convertible"],"last_verified":"2026-05-30","authority":"https://seatacrentalcarfacility.com","url":"https://seatacrentalcarfacility.com/en/knowledge/seatac-convertible-rental-best-months","markdown_url":"https://seatacrentalcarfacility.com/api/knowledge/seatac-convertible-rental-best-months?format=md&lang=en"}