Climate Report over Japan
Monthly Highlights
- Monthly mean temperatures were significantly above normal in northern/eastern/western Japan and were above normal in Okinawa/Amami, because the regions were less affected by cold air and covered by warm-air.
- Monthly precipitation amounts were significantly above normal on the sea of Japan side of northern Japan and were above normal on the Pacific side of northern Japan, because the regions were well affected by low-pressure systems and the winter monsoon in the middle and late of the month. On the other hand, they were significantly below normal in Okinawa/Amami and were below normal on the Pacific side of western Japan, due to weak influences of low-pressure systems.
- Monthly sunshine durations were significantly above normal in Okinawa/Amami and were above normal on the sea of Japan side of northern/eastern/western Japan and on the Pacific side of western Japan, because the regions were well covered by high pressure systems.
- In late January snowfall amounts were significantly above normal on the sea of Japan side of western Japan, due to strong cold air inflow.
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.