average temperature marianna fl
2.7. The highest average temperature in Marianna is July at 81.3 degrees. The coldest average temperature in Marianna is January at 53.3 degrees. The most monthly precipitation in Marianna occurs in January with 3.6 inches.The Marianna weather information is based on the average of the previous 3-7 years of data.Loading...he Marianna, FL air quality index is a median value which considers the most hazardous air pollutants. The Marianna, FL air quality index is 6.6% less than the Florida average and 33.6% less than the national average.