Traders price "no rain" at 77.5% for the Italian Grand Prix at Monza because early-September historical patterns at the circuit show predominantly dry race weekends with average highs near 25°C and limited precipitation risk. Long-range models currently point to stable high pressure and light winds through the first week of September, reducing the chance of showers that could force intermediate or full-wet tire changes. Recent August conditions around Lombardy have featured scattered afternoon storms that typically clear by early September, supporting dry-track expectations. While late scratches or sudden shifts remain possible in motorsport, the consensus reflects Monza's usual late-summer setup favoring slick-tire strategies and uninterrupted sessions.