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We consent to the incorporation by reference in this Registration Statement on Form S-3 of our reports dated February 11, 2021, relating to the consolidated financial statements of NorthWestern Corporation and subsidiaries (the “Company”), and the effectiveness of the Company’s internal control over financial reporting, appearing in the Annual Report on Form 10-K of NorthWestern Corporation for the year ended December 31, 2020. We also consent to the reference to us under the heading "Experts" in such Registration Statement.