Climate Report over Japan
Monthly Highlights
- The first half of October brought notably warmer than normal temperatures nationwide, due to warm air advection for northern Japan, and in addition to this, sunny conditions associated with frequent high pressure systems for the other regions in the country. Later in the month, however, temperatures sharply dropped in most of the country because of air mass inflow from the continent very cold for this time of the year. In aggregate monthly mean temperatures were above normal in eastern to western Japan and Okinawa/Amami.
- Monthly precipitation amounts were significantly above normal in the Sea of Japan side of northern Japan due to influences from low pressure systems and fronts. Monthly precipitation amounts were below normal and monthly sunshine durations were above normal in most of eastern to western Japan, significantly so in some regions, due to high pressure systems frequently seen settling over the area.
Climate Anomaly Table Over Japan
Monthly Climate Anomaly over Japan
Time Series of Temperature Anomaly
Time Series of 10days Precipitation Amount Ratio and Sunshine Duration Ratio
10-day Mean Sea Level Pressure
10-day Mean 850hPa Temperature
10-day Mean 500hPa GeoPotential Height
10-day Mean Outgoing Longwave Radiation
Note: Figures of outgoing longwave radiation (OLR) in Monthly Report over Japan are based on the NOAA CPC Blended OLR data from the September 2023 report, while they were based on the NOAA CPC AVHRR OLR data until the August 2023 report.