This article examines the coldest month in Japan and the weather patterns typically experienced during that time of year. January or February tend to be the coldest months, depending on which region is being looked at, with Tokyo and other areas along the Pacific Coastline experiencing temperatures averaging between 0-5 degrees Celsius (32-41 Fahrenheit) while Sapporo and other regions further north such as Hokkaido and Aomori Prefecture experience temperatures averaging between -10-0 degrees Celsius (14-32 Fahrenheit). Snowfall is common throughout Japan during winter months, as well as strong winds from Siberia known as “Siberian High” or “Siberian Winds”. Factors that affect temperature across different regions include topography, latitude/longitude position, proximity to bodies of water such as oceans or seas, and seasonal changes due to monsoon winds bringing warmer air masses into certain areas. Tips for surviving the coldest months are also provided.