Climate Report over Japan
Seasonal Highlights
- Seasonal mean temperatures were significantly above normal in northern/eastern/western Japan, because the regions were covered by warm air. The regional average of seasonal mean temperature were the highest on record for autumn since 1946 in northern/eastern Japan. The seasonal anomaly of the average temperature over Japan was +1.39 ℃ (the warmest for the season since 1898).
- Seasonal precipitation amounts were significantly above normal on the Sea of Japan side of northern Japan, which was well affected by low-pressure systems and cold air temporarily. The regional average of seasonal precipitation amounts was the highest on record for autumn since 1946 on the Sea of Japan side of northern Japan. On the other hand, seasonal precipitation amounts were significantly below normal on the Pacific side of eastern/western Japan and in Okinawa/Amami due to less low-pressure systems and typhoons. The regional average of seasonal precipitation amounts was the lowest on record for autumn since 1946 on the Pacific side of western Japan.
- Seasonal sunshine durations were significantly above normal on the Pacific side of eastern/western Japan, on the Sea of Japan side of western Japan, and in Okinawa/Amami, because high pressure systems frequently covered the regions. The regional average of seasonal sunshine durations were the highest on record for autumn since 1946 on the Pacific side of eastern/western Japan and on the Sea of Japan side of western Japan.
Climate Anomaly Table Over Japan
Seasonal Climate Anomaly over Japan
Monthly Mean 500hPa GeoPotential Height
