Lansing has a temperate climate with well-defined seasons. Summer is generally warm and humid with temperatures in the 70s. Temperatures in the winter months are usually in the 20s but often drop below freezing. Heavy snowfall is common during the winter due to Lansing's proximity to Lake Michigan.
Lansing has a normal daily mean temperature of 46F, ranging from 21F in January to 71F in July. July is generally the warmest month and January the coldest.
The annual average precipitation at Lansing is 31.53 Inches. Rainfall is fairly evenly distributed throughout the year. The wettest month of the year is June with an average rainfall of 3.60 Inches. The southern half of the Lower Peninsula is an area of heavy thunderstorm activity. Late spring and early summer are the height of the tornado season.
Temperature variations between night and day tend to be moderate during summer with a difference that can reach 23 degrees Fahrenheit, and fairly limited during winter with an average difference of 16 degrees Fahrenheit.