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In terms of precipitation, rainfall in Hamilton ranges from 2.8 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. March is typically the driest time to visit Hamilton when rainfall is around 2.8 in.
If weather is an important factor for your trip to Hamilton, use this chart to help with planning. For those seeking warmer temperatures, February is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 48.2 F).