Overview

• The Japan Meteorological Agency released its three‑month forecast on September 22, covering October through December alongside a winter outlook.
• Temperatures are expected to run warmer than normal across wide areas in October and November before a rapid cool‑down late in the season.
• December is forecast to be more prone to cold air incursions, with average temperatures near normal in northern Japan and near or below normal elsewhere.
• October precipitation is projected to be near or above normal on the Pacific side of eastern Japan and in western Japan.
• For December–February, average temperatures are expected to be near normal nationwide, with Sea of Japan‑side snowfall near or above normal in western Japan and near normal in northern and eastern regions.