Wednesday is the first day of September which is Meteorological Fall, and today started cold. Under clear skies, several locations in western Montana woke up to temperatures in the 20s and 30s, but here's the good news; today, the state will have a Fall-like feel. The sun will be out, the wind will be a tad breezy at times, and the highs will remain in the 70s for most of the region. Meteorological seasons are simply broken up based on the annual temperature, whereas Astronomical seasons are based on the position of Earth in relation to the sun.
Thursday will be a comfortable day. The highs will cool to the 60s and low to mid-70s, the skies will remain mostly sunny skies, and the wind will blow comfortably from the north.
Friday is the start of a "warm-up" for areas west of the Divide and in portions of southwest and north-central Montana. The high temperatures will start to climb to the mid to upper 70s.
Looking ahead into Labor day weekend, expect daytime highs to rebound back into the 80s.
Have a great day.