In the wake of a cold front on Friday, temperatures dropped to near or a little below  freezing in much of Western Wyoming by sunrise Saturday. The coldest reported in Star Valley was 30F at Afton airport, followed by 32F at Thayne Elementary and Double L Ranch. The air mass is quite dry so only a light frost was likely experienced. Below is a plot of observed minimums this mornng.

Minimum temperatures Saturday June 25 2016