Does New York City get heatwaves in December?

I know it's winter when it's December in New York City. A friend of mine went there in early-mid December 2015. One of the days, she commented that it was "boiling" and wore a tshirt and jeans around town. However, her other days were cold and frosty. I don't know if she was exaggerating a... show more I know it's winter when it's December in New York City. A friend of mine went there in early-mid December 2015.

One of the days, she commented that it was "boiling" and wore a tshirt and jeans around town.

However, her other days were cold and frosty.

I don't know if she was exaggerating a sunny winter day, but does NYC get the odd warm day in the middle of winter?
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