December 1st to February 28th-29th... season......ave temp...coldest temp... 1869-70..........34.5.......... 1870-71..........30.9 1871-72..........29.3...........-1 1872-73..........28.3...........-4 1873-74..........34.0 1874-75..........27.6...........-6 1875-76..........34.1............5 1876-77..........29.8............3 1877-78..........33.3............7 1878-79..........29.2...........-4 1879-80..........38.5............7 1880-81..........26.6...........-6 1881-82..........3