Climate Report over Japan
Monthly Highlights
In Okinawa/Amami, monthly mean temperature tied with 2014 as the highest on record for September since 1946, as well as monthly sunshine durations were above normal, since the Pacific High extended to the south of Japan. Monthly sunshine durations were significantly above normal in northern Japan and on the Sea of Japan side of eastern Japan, since high-pressure systems tended to cover the regions. On the other hand, monthly sunshine durations were below normal in western Japan due to fronts and moist air inflow. In the middle of September, northern Japan, eastern Japan and Okinawa/Amami experienced heavy rain that caused river overflows and landslides, due to the approach of the typhoon TALIM.
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.