A cold front is pushing offshore and on its heels is a more seasonable October air mass.
Temperatures this morning north of the Great Lakes were in the 20s and 30s and will only rise into the 40s and lower 50s this afternoon. This chilly weather is beginning to seep into the Northeast and New England and will be ours for the next 36 to 48 hours.
Temperatures will hold steady in the lower 60s today but north winds will take hold this afternoon and temperatures will fall back through the 50s and into the 40s tonight, as busy north winds add a distinct chill to the air.
Tuesday will feature sunshine with deep blue skies mixed with some passing clouds rolling in off the ocean. Temperatures will struggle to get to 60F and active north winds will persist through the day.
Tuesday night does offer the first opportunity from some isolated pockets of frost on the Cape (whereas most of Southern New England has an opportunity for frost tonight). With high pressure gradually shifting into the area winds will tend to slacken off overnight and that, combined with a fresh, cool, dry air mass will allow temperatures to fall more easily than they will tonight.
The extent of the temperature free-fall will be dependent upon where, how early and for how long winds can go calm during Tuesday night. Right now, the set-up favors a few spots getting into the middle 30s, with exposed locations, hilltops and shoreline areas remaining closer to 40 to 45F.