So far September has been very mild in Boise, in fact the first 18 days were the 5th warmest on record for that time period. However, a major cool down is expected for the middle of the week as temperatures drop into the 60s.
Another cold front moved through Tuesday afternoon keeping temperatures around 10° cooler than Monday. The main impact from the front has been to bring in some cloud cover and a breeze. Skies will be mostly clear Tuesday night allowing temperatures to dip into the low to mid 40s in the valleys, and 20s to 30s in higher elevations.
A low pressure system dropping in from western Canada will send yet another cold front through the region on Wednesday. A gusty northwest breeze develops during the afternoon and into Wednesday night with sustained wind at 10-20 mph and gusts up to 30 mph.
As the storm system meanders through eastern Oregon and southwest Idaho, scattered rain showers and very cool temperatures are anticipated - even some light snow for ridge tops above 7000 feet!
