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In terms of precipitation, rainfall in Vigo ranges from 1.6 - 11.7 inches per month. December is typically the wettest month, when rainfall can reach 11.7 in. August is typically the driest time to visit Vigo when rainfall is around 1.6 in.
If weather is an important factor for your trip to Vigo, 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 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 46.4 F).