WeatherTAB Hepp Heights, Florida Help C F. Zierden said the nighttime temperatures are the most concerning for those who dont have air conditioning. Miami-Dade County provides an July is the hottest month in Florida with an average temperature of 28C (82F) and the coldest is January at 16C (61F) with the most daily sunshine hours at 10 in July. Monthly: 1981-2010 normals. . warmer than normal monthly temperatures for Skycam, FORECASTS Click to add a point.Double-click to end. 2024 Miami Marathon & Half Marathon - Half Marathon Guide ,