An inspection was held at Glanford Park on Friday morning and the pitch was deemed unplayable.
Scunthorpe said on their Twitter feed: “Saturday’s home clash against Portsmouth has been postponed because of a frozen pitch.”
Northampton striker Kevin van Veen is hoping to make his first start in over a month in the home game against Shrewsbury.
Derby's decision to postpone Sunday's home Sky Bet Championship game against Cardiff was made independently, Derbyshire Police have confirmed.
Rochdale have no new injury worries ahead of Tuesday's Sky Bet League One relegation battle with fellow strugglers Fleetwood.