The last time daytime highs were in the 60s and lows were in the upper 30s/low 40s...May and June!
The coolest temps will invade Friday night into Saturday morning with cool Canadian high pressure building overhead. With clear skies and light winds, we will have the perfect ingredients for radiational cooling. Without the insulation that clouds provide, all our daytime warmth will escape up into the atmosphere and temps will drop like a rock! Lows: mid 30s to low 40s and patchy frost in some towns!!
This is my forecast for high temps tomorrow, and the 48 hour temperature difference. Everyone will be 20 or more degrees cooler within the span of two days.