Climate Report over Japan
Monthly Highlights
- Northern Japan was frequently covered by high pressure systems. Monthly sunshine durations were significantly above normal on the Sea of Japan side of northern Japan (the longest on record for September since 1946) and above normal on the Pacific side of northern Japan. Monthly precipitation amounts were below normal in northern Japan.
- Monthly sunshine durations were below normal in western Japan and on the Pacific side of eastern Japan due to cloudy and rainy weather conditions brought by the fronts and Typhoon Chanthu until mid-September.
- In Okinawa/Amami, monthly mean temperatures and monthly sunshine durations were significantly above normal due to high pressure systems that often covered the region.
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.