Jacksonville fl weather averages The city is also prone to hurricanes, which can bring heavy rainfall, high winds, and storm surges to the area. The Atlantic hurricane season runs from June 1 through November 30, with the peak of the season occurring from mid-August through late October. In terms of sunshine, Jacksonville enjoys an average of 290 sunny days per year. The city's sunniest month is July, with an average of 10.2 hours of sunshine per day. The cloudiest month is December, with an average of 5.5 hours of sunshine per day. In terms of sunshine, Jacksonville enjoys an average of 290 sunny days per year. The city's sunniest month is July, with an average of 10.2 hours of sunshine per day. The cloudiest month is December, with an average of 5.5 hours of sunshine per day. Overall, Jacksonville's weather is characterized by hot, humid summers and mild, dry winters. The city experiences a significant amount of rainfall, particularly during the wet season, and is at risk of hurricane activity during the Atlantic hurricane season. Despite this, Jacksonville enjoys a high number of sunny days per year, making it a desirable location for those who enjoy outdoor activities.