- The seasonal anomaly of the average temperature over Japan was +1.66°C (the warmest for the season since 1897/1898).
- Seasonal mean temperatures were the highest on record for winter since 1946/1947 in eastern and western Japan because winter monsoon and cold-air inflow were weaker than normal.
- Seasonal snowfall amounts were the least on record for winter since 1961/1962 on the Sea of Japan side of northern and eastern Japan.
- Seasonal precipitation amounts were significantly below normal on the Sea of Japan side of northern Japan, and were significantly above normal on the Sea of Japan side of western Japan.
- Seasonal sunshine durations were significantly below normal on the Pacific side of eastern Japan since cyclones periodically passed over mainland Japan, and were significantly above normal in Okinawa/Amami because of high pressure systems and weaker-than-normal cold-air inflow.