Climate Report over Japan
Monthly Highlights
-Monthly mean temperatures were significantly above normal in eastern/western Japan and Okinawa/Amami, and were above normal in northern Japan. Monthly snow fall amounts were significantly below normal on the sea of Japan side of northern/eastern/western Japan. These anomalous climate conditions were caused by weaker-than-normal winter monsoon and warm-air inflow mainly in the middle of the month.
-Monthly precipitation amounts were significantly above normal on the sea of Japan side and on the Pacific side in western Japan, and were above normal on the Pacific side of eastern Japan. Monthly sunshine durations were significantly below normal on the sea of Japan side in western Japan and on the Pacific side in eastern/western Japan, because the regions were well affected by low-pressure systems and fronts in early and late part of the month.
-In Okinawa/Amami, monthly precipitation amounts were below normal and monthly sunshine durations were above normal in Okinawa/Amami, due to weaker influences of low-pressure systems and winter monsoon.
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.