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In terms of precipitation, rainfall in Samoa ranges from 3.1 - 17.7 inches per month. January is typically the wettest month, when rainfall can reach 17.7 in. July is typically the driest time to visit Samoa when rainfall is around 3.1 in.
If weather is an important factor for your trip to Samoa, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of August, when temperatures are typically at their lowest (around 77.0 F).