Planning for the weather is a good way to make your trip to Managua relaxing and enjoyable, especially when you’re splurging. The hottest months are usually April and March, with an average temperature of 28°C, while the coldest months are January and December, with an average of 26°C. The rainiest months in Managua are October, June, September and August, with each month seeing an average of 272 mm of rainfall.