It's like clockwork.
"
Tuesday a weak surface low pressure moves into SNE and this in conjunction with the high to the north will push a backdoor cold front through the region taking those 70s we enjoyed on Monday out
of the forecast for two days. Highs will be limited to the 60s (inland) and 50s (along the coast) each day. A mid level shortwave
moves out of the Great Lakes Tuesday night bringing a round of light rain to the region overnight into Wednesday. The best forcing from divergence at 300 mb and upslope orographics will place the bullseye for the largest rainfall totals over northern/central MA "