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In terms of precipitation, rainfall in Guanaja ranges from 2.0 - 17.7 inches per month. October is typically the wettest month, when rainfall can reach 17.7 in. April is typically the driest time to visit Guanaja when rainfall is around 2.0 in.
If weather is an important factor for your trip to Guanaja, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).