The winters are variable.

Some years they vacillate between -10C and 4C causing ice to melt to water and then refreeze, nature's jackhammer to any surface cracks in the asphalt road resulting in a city budget line item for "springtime pothole fixing".

Once in awhile, the temps will drop to below -20C for several days/weeks. Not as bad as midwest USA/Canadian prairies winters requiring a heater for your car engine block, but going outside is laborious and painful for long periods.

I only said it was mild compared to elsewhere in Canada, not that they were mild.