Weather records go back to 1881 in New Brunswick and Environment Canada is confirming December 2015 was the warmest ever!
Greater Moncton was 4.4 C above normal, Fredericton was 4.9 C above normal and Saint John was 5.1 C above normal.
The weather office says even 1 C above average is considered significant but 4 to 5 C is almost unheard of and in this case record-breaking.
Forecasters say possible factors were a strong El Nino and a jet stream which consistently veered north of New Brunswick last month allowing for a southwesterly air flow.
Despite the warmth across the province, snowfall totals were actually higher than normal including in Greater Moncton at 96.4 cm (average is 62 cm).