Overview

• SMN sets the season from September 2025 to May 2026 with a forecast of roughly 51–56 frontal systems, near the long-term average.
• The first front is projected to arrive around September 15, though forecasters note fronts can sometimes reach the northern border in late August.
• Greatest intensity is expected in November and February, when stronger polar air masses typically arrive.
• Impacts include sudden temperature declines, heavy rain, gusty winds, coastal “Norte” events with elevated waves, and in higher elevations frost or snow.
• Cenapred notes each front usually influences the country for five to seven days, and Protección Civil advises layered clothing, safe ventilation for heaters, vaccination for at‑risk groups, and readiness kits.