This winter, December through February, has seen the coldest average high temperatures on record. Here are the 5 coldest average high mean temperatures for Dec thru Feb. Year Avg High Temp. Mean Dec Jan Feb 2022-23 64° 62° 66° 64.0° 2007-08 62° 64° 67° 64.3° 1987-88 59° 63° 74° 65.3° 1997-98 64° 69° 64° 65.7° 1992-93 63° 67° 68° 66.0°