Canít wait to get out in nature, Shell Rock River Trail in Butler County, Iowa is the outdoors at it's best. Iowa has lots of outdoors activities. Shell Rock River Trail is a good place of typical rainfall. The wettest month of the year is regularly July, that's the one that rains the most, and the driest month of the year is January. Summertime highs at Shell Rock River Trail commonly tend to be in the 80's, and throughout the night it cools down to the
60's. Daytime highs during the winter are in the 20's, and winter nights come with lows in the 0's to Shell Rock River Trail.