Area Climate

Andover has a humid subtropical climate (Koppen Cfa) with hot, humid summers and cool to cold, dry winters. Over the course of a year, temperatures range from an average low of about 20 °F (-7 °C) in January to an average high of nearly 93 °F (34 °C) in July. The maximum temperature reaches 90 °F (32 °C) an average of 64 days per year and reaches 100 °F (38 °C) an average of 14 days per year. The minimum temperature falls below 32 °F (0 °C) an average of 108 days per year. The first fall freeze typically occurs between the second week of October and mid-November, and the last spring freeze occurs between the end of March and the final week of April.

The area receives over 30 inches (760 mm) of precipitation during an average year, with the largest share being received in May and June—with a combined 21 days of measurable precipitation. During a typical year, the total amount of precipitation may be anywhere from 22 to 40 inches (560 to 1,000 mm). There are on average 88 days of measurable precipitation per year. Winter snowfall averages almost 17 inches (43 cm), but the median is less than 8 inches (20 cm). Measurable snowfall occurs an average of 11 days per year with at least an inch of snow being received on five of those days. Snow depth of at least an inch occurs an average of 18 days per year.