Iowa is a great outdoors state. Sauk Rail Trail is in a quite desolate area and it sure is a nice trail. Throughout the warmest time of the year at Sauk Rail Trail temperatures are regularly in the 80's with overnight lows in the 60's. The wintertime comes with highs in the 20's, and overnight lows throughout the winter for Sauk Rail Trail tend to be in the 0's. The yearly rainfall here at Sauk Rail Trail is about average. The month with most of the rain is June while January is generally the driest month.