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In terms of precipitation, rainfall in Niigata ranges from 3.5 - 9.1 inches per month. December is typically the wettest month, when rainfall can reach 9.1 in. May is typically the driest time to visit Niigata when rainfall is around 3.5 in.
If weather is an important factor for your trip to Niigata, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 37.4 F).