In terms of precipitation, rainfall in Hokkaido Prefecture ranges from 2.0 - 5.9 inches per month. September is typically the wettest month, when rainfall can reach 5.9 in. April is typically the driest time to visit Hokkaido Prefecture when rainfall is around 2.0 in.
If weather is an important factor for your trip to Hokkaido Prefecture, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).