Planning for the weather is a good way to make your trip to Isla de Utila relaxing and enjoyable, especially when you’re splurging. The hottest months are usually May and June, with an average temperature of 26°C, while the coldest months are January and February, with an average of 23°C. The rainiest months in Isla de Utila are November, October, January and December, with each month seeing an average of 259 mm of rainfall.