Hermantown's Climate Data and Its Top-Rated Window Pros
Local risk and climate data for Hermantown, MN sit below, translated into plain terms for a window buyer rather than left as raw codes. 10 installers follow that data instead of a license roster, their rank built from Google's star rating and how many people left one. Checked October 2026.
Google Maps ratings checked · How we rank
7IECC climate zone · ENERGY STAR Northern zone
Hermantown's climate zone, in plain terms
Hermantown falls in IECC climate zone 7, and ENERGY STAR separately groups St. Louis County into its Northern zone for window certification.
Those two numbers, not the brand on the box, set the U-factor and SHGC worth checking on any quote you get in Hermantown.
A Duluth, MN-WI contractor who can't name either one on request is worth a second question before you sign.
Data: U.S. EPA / DOE, ENERGY STAR, ENERGY STAR Version 7.0 Climate Zones by County/ZIP (Windows, Doors, and Skylights) (V7.0); Pacific Northwest National Laboratory (DOE Building America), Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates (PNNL-33270) (2021 IECC), from the nearest NOAA station 3.1 mi away.
What FEMA's risk data says about Hermantown
St. Louis County's hail risk sits at Relatively Moderate and its wildfire risk at Relatively Low, according to FEMA's National Risk Index.
Hail risk matters for glass and screen durability in Hermantown; wildfire risk matters more for the frame material and nearby vegetation than for the glass itself.
Either way, it's a reasonable question to bring to a Hermantown installer before you settle on a product line.
- Strong wind
- Relatively Moderate
- Winter weather
- Very High
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Hermantown window bids come in
- How to Read an NFRC Window Label Four numbers on one sticker decide most of a window's real-world performance. Here's what each one means.
- ENERGY STAR Window Criteria by Climate Zone ENERGY STAR splits the country into four zones, each with its own numbers. Here they are, and why the Northern zone works backward from the other three.
- Impact Windows vs. Shutters in Florida's Hurricane Zones Florida gives homeowners two paths to a protected opening. Here's how each one is tested, and where the HVHZ raises the bar further.
Hermantown's top-rated window installers, by Google
The order below weighs a Google rating against its review count, the same way this site weighs a U-factor against a brochure claim: on the number, not the name. Treat it as a rating, never as proof of a license, bond or HVHZ approval.
- Peak Construction RoofingGoogle reviews
- Mad City Windows & Baths of DuluthGoogle reviews
- Window World Twin Ports RegionGoogle reviews
- Morins ExteriorsGoogle reviews
- Home Solutions ProGoogle reviews
- The Glass GuruGoogle reviews
- Your Home Improvement Company - Windows & BathGoogle reviews
- Billman Home CenterGoogle reviews
- Heritage Window & DoorGoogle reviews
- Walsh Building ProductsGoogle reviews