Climate Report over Japan
Monthly Highlights
- Monthly mean temperatures were below normal all over the country, especially in western Japan, since significant cold air intermittently flowed in the country.
- Monthly precipitation amounts were above normal on the Sea of Japan side of northern and eastern Japan, since the regions were often affected by low pressure systems. Heavy snows were sometimes observed in northern Japan and on the Sea of Japan side of eastern Japan due to the developed low pressure systems and the ensuing strong winter monsoon.
- The prevailing winter monsoon also brought below normal monthly sunshine durations on the Sea of Japan side of northern to western Japan and Okinawa/Amami.
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.