In terms of precipitation, rainfall in Horn Island ranges from 0.0 - 18.1 inches per month. January is typically the wettest month, when rainfall can reach 18.1 in. August is typically the driest time to visit Horn Island when rainfall is around 0.0 in.
If weather is an important factor for your trip to Horn Island, use this chart to help with planning. For those seeking warmer temperatures, November is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 75.2 F).