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In terms of precipitation, rainfall in Kahului ranges from 0.1 - 3.8 inches per month. January is typically the wettest month, when rainfall can reach 3.8 in. June is typically the driest time to visit Kahului when rainfall is around 0.1 in.
If weather is an important factor for your trip to Kahului, 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 71.6 F).