In terms of precipitation, rainfall in Moncton ranges from 3.0 - 4.2 inches per month. March is typically the wettest month, when rainfall can reach 4.2 in. August is typically the driest time to visit Moncton when rainfall is around 3.0 in.
If weather is an important factor for your trip to Moncton, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 17.6 F).