Exhibit

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-212794, 333-211075) and Form S-8 (Nos. 333-162890, 333-183051, 333-190336, 333-207846, 333-228120) of ALLETE, Inc. of our reportdated February 14, 2019, relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10‑K.