July is the hottest month in Marbella with an average temperature of 24°C (75°F) and the coldest is January at 11°C (52°F) with the most daily sunshine hours at 14 in July.The wettest month is November with an average of 115mm of rain.uly is the hottest month in Marbella with an average temperature of 24°C (75°F) and the coldest is January at 11°C (52°F) with the most daily sunshine hours at 14 in July.