River Level
Upper Iowa River Level at the USGS Gage in Decorah
https://waterdata.usgs.gov/monitoring-location/05387500/
Generally when the river flow is below 200 cfs at Decorah, the Upper Iowa River is very low, and above 1,000 cfs it is pretty high and in either case you may want to consider a bike ride instead. Learn more about paddling the Upper Iowa River at https://upperiowariver.org/recreation/paddling/