Environment Canada says it was a wetter than normal December in Sarnia.
On December 28, Sarnia set a new precipitation record with 39.2 millimetres of rain, snow and snow melt recorded in a series of storms, surpassing the previous record for that date of 17.8 millimetres documented in 1959.
That followed a major system containing a heavy mix of precipitation, impacting travel across southern Ontario on Boxing Day, December 26.
The national weather agency said six to eight hours of freezing rain across parts of southwestern Ontario resulted in multiple crashes and power outages.
A transformer in Sarnia exploded from the weight of the ice, and tree branches brought down power lines from Point Edward to Bright's Grove.
Normal precipitation for the month of December in Sarnia is about 60 millimetres according to Environment Canada.
Last month, the city recorded a total of 91.9 millimetres of precipitation, just shy of a record set in December 2008 of 93 millimetres.
Environment Canada said overall, December was cooler than normal right across Ontario.
The average daytime high in Sarnia in December is around 2 Celsius.