Exhibit 23 12-31-2012

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-166515, 333-170289) and Form S-8 (Nos. 333-91348, 333-183051, 333-162890) of ALLETE, Inc. of our reportdated February 15, 2013, relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10‑K.