The upcoming winter from December 2024 to February 2025 is expected to be average or slightly colder than usual, particularly on the Sea of Japan side, where La Niña is likely to increase snowfall. October will see high temperatures nationwide, with summer-like days in western and eastern Japan. By November, temperatures will drop, feeling suddenly colder, although northern Japan might experience slightly above-average temperatures. December is anticipated to bring typical winter cold across the country. Precipitation on the Sea of Japan side is forecasted to be average or above, with significant snowfall due to a strong winter pressure pattern, while the Pacific side may see less precipitation. The probability of La Niña occurring is estimated at 60%, which typically results in colder winters. Despite the low expectation for a mild winter, the extent of heavy snowfall remains uncertain, especially on the Sea of Japan side, where preparations should be made. Various meteorological agencies, including the World Meteorological Organization and Japan Meteorological Agency, predict a transition to La Niña in late 2024, although the strength and duration are uncertain due to the "spring barrier" effect. The jury is still out on how climate change might alter traditional La Niña characteristics, so staying alert to weather updates is advisable.