The heat of summer is tempered in the south by the winds from the Gulf of Mexico, and in the north by the elevation above the sea. The average annual temperature is highest in the southwest along the coast, and lowest in the northeast among the highlands. Thus at Mobile the annual mean is , the mean for the summer , and for the winter ; and at Valley Head, in De Kalb county, the annual mean is , the mean for the summer , and for the winter . At Montgomery, in the central region, the average annual temperature is , with a winter average of , and a summer average of . The average winter minimum for the entire state is , and there is an average of 35 days in each year in which the thermometer falls below the freezing-point. At extremely rare intervals the thermometer has fallen below zero (-18 °C), as was the case in the remarkable cold wave of the 12th-13 February 1899, when an absolute minimum of was registered at Valley Head. The highest temperature ever recorded was in Talladega county in 1902.
The heat of summer is tempered in the south by the winds from the Gulf of Mexico, and in the north by the elevation above the sea. The average annual temperature is highest in the southwest along the coast, and lowest in the northeast among the highlands. Thus at Mobile the annual mean is , the mean for the summer , and for the winter ; and at Valley Head, in De Kalb county, the annual mean is , the mean for the summer , and for the winter . At Montgomery, in the central region, the average annual temperature is , with a winter average of , and a summer average of . The average winter minimum for the entire state is , and there is an average of 35 days in each year in which the thermometer falls below the freezing-point. At extremely rare intervals the thermometer has fallen below zero (-18 °C), as was the case in the remarkable cold wave of the 12th-13 February 1899, when an absolute minimum of was registered at Valley Head. The highest temperature ever recorded was in Talladega county in 1902.