Much colder weather & frost on our doorstep

It was a perfect Thanksgiving Monday on L'Ile Perrot with sunshine and record warmth. (ValleyWX Photo)

Depending on where you were in southern Quebec on Thanksgiving Monday, you may have had the warmest October 12 on record. The temperature reached 24.9C (77F) here on L'Ile Perrot but 23.5C (75F) at Trudeau Airport just missing the record of 23.9C (76F) set in 1961. No matter where you were across the region it was a perfect way to end the summer season for good. I say that because much colder air is on the way. Looking ahead I don't see another opportunity for temperatures that warm. We are rapidly loosing daylight as well which tends to limit just how warm it can get.

Frost & Snowflakes
This morning a series of cold fronts is off to our west and will begin the slow process of lowering temperatures this week. Expect showers to develop today and persist into Wednesday. The temperature will reach 18C (65F) today, but only 12C (54F) Wednesday and no better than 5C (41F) by Saturday. The weather will be rather unsettled all week with limited sunshine and periodic showers. I am quite confident that by Saturday or Sunday morning we will see a hard frost in most regions of southern Quebec including metro Montreal. Overnight lows will drop below freezing for the first time this season. There is also the chance for a few snow showers across the mountains of southern Quebec and New England. Looking ahead into next week milder temperatures are forecast to return but not the 20 plus weather we just experienced.