Winter weather advisories are posted and snow and freezing rain are already overspreading the state.
In Hartford, the University High School of Science and Engineering is closed for the day after a pipe burst, sending water into the building.
There will mainly be light and accumulations will be minor. A coating to an inch of snow will stick across central and southern Connecticut, with as much as 1 to 2 inches of snow along the Massachusetts border.
A glaze of ice will make travel on any untreated surfaces difficult.
AAA responded to approximately 1,000 emergency road calls by 4 p.m. on Monday, according to a spokesperson.
Bradley airport reported about a dozen flight cancellations and scattered delays through Monday evening.
Temperatures will slowly warm above freezing by dark along the coast, but the mercury will stay below 32 degrees inland. There will not be enough ice to weigh down trees or power lines but it will be enough to make roads slippery for the evening commute.
The recent shot of cold weather has chilled surfaces including roads, sidewalks, railings and parking lots, making any untreated surface vulnerable to icing from even a small amount of freezing rain.
The freezing rain will taper off by midnight and temperatures will slowly warm.