After a cool, wet, and cloudy Father's Day/start to summer, today will be the complete opposite. A ridge of high pressure will build back into the state, giving off; warmer, drier, and sunnier conditions. The high temperatures will warm back into the 70s and 80s.
Tuesday, a weak disturbance moves through the ridge during the afternoon/evening bringing a few showers and a possible thunderstorm or two to southwest Montana. Daytime highs will top out in the 80s and 90s
Aside from clouds moving in, Wednesday will start fairly quiet. The high temperatures will remain in the 80s and 90s. A cold front will swing south from Canada Wednesday night into Thursday, cooling the temperatures, and bringing the chance of showers and thunderstorms to much of the area.
Thursday will not be as warm or sunny. Behind the passage of a cold front, daytime highs will cool to the 70s and 80s.
Looking ahead into Friday through the weekend, a ridge of high pressure will build back into the area and warm the temperatures to the 80s and 90s.
Next week Monday daytime highs will soar back into the triple digits for a few locations in the eastern half of the state.
Enjoy the First day of summer.