So much of the Idaho population center lies in the Snake River Valley, creating a U shape through southern Idaho. Idaho Falls is in the eastern part of the state, and I cannot confirm whether or not there are indeed snakes there.

At 653PM, MT, Idaho Falls was reporting a temperature of 77 degrees with clear skies. It’s been dry in the northern Rockies, and there are red flag warnings out for the region. Conversely, low pressure moving through British Columbia is going to bring enough cold air southward that there are freeze advisories for northern Idaho. This is indicative of the overnight cooldown expected in Idaho Falls tonight.
By Tuesday the next system will be moving into the Gulf of Alaska, and drawing warm air back northward. There may be a few clouds on Monday with the cooler air intruding, but it should clear out and warm right back up on Tuesday, the beginning of an uneven week.
Tomorrow – Partly cloudy, chilly in the morning, High 64, Low 40
Tuesday – Sunny and warmer by afternoon, frost in the morning, High 71. Low 31

TWC: Tomorrow – Some clouds in the morning will give way to mainly sunny skies for the afternoon HIgh 66, Low 39
Tuesday – Mainly sunny. High 73, Low 32

AW: Tomorrow – Mostly sunny and cooler HIgh 66, Low 41
Tuesday – Partly sunny and nice High 72, Low 33

NWS: Tomorrow – Sunny, High 64, Low 43
Tuesday – Sunny, High 70, Low 38

WB: Tomorrow – Sunny, High 62, Low 46
Tuesday – Sunny, warmer, High 68, Low 37

WN: Tomorrow – Mostly sunny, High 63, Low 45
Tuesday – Mostly sunny, High 69, Low 48

CLI: Tomorrow – Partly cloudy, High 75, Low 39
Tuesday – Partly cloudy, High 74, Low 45

I’ve checked. No typos here, this forecast just looks to be all over the map. Satellite would suggest that this shouldn’t be so complicated.