Currently Reading

IECC Report Shows Warming Climate Across U.S.


IECC Report Shows Warming Climate Across U.S.

Here are the regions reporting the most substantial changes.

November 5, 2021
City pollution in the sky

The 2021 International Energy Conservation Code (IECC) reveals warming climates in various counties across the United States, with the upper Midwest reporting the biggest warming changes. Major climate changes were also found in states like Wisconsin and Michigan, which are seeing higher temperatures compared to other regions which have stayed the same since the IECC’s 2018 report. 

Though environmental changes like those shown on the 2021 IECC climate zone map affect everyone living in warming regions, a hotter climate also has serious implications for homeowners, builders, and manufacturers, says Energy Vanguard.

The big warming changes are in the upper Midwest. Wisconsin wins the award for the most change. It no longer has any counties in climate zone 7. The Upper Peninsula in Michigan also lost all of its CZ-7 counties but still has a toehold in that zone because one of the CZ-6 counties flipped to 7. Minnesota, which was about half CZ-6 and half CZ-7 now has some CZ-5 in the south and about a third of the state in CZ-7.

First, of course, these changes show that the climate really is changing. The folks who update the IECC are builders, code officials, manufacturers, and other stakeholders in the construction industry. Yes, there probably are some who talk about the “climate emergency,” but on the whole, I’d say this is a pretty conservative group. The IECC climate zones are based on actual numbers for heating and cooling degree days. This is a fact-based change.

Read More

Related Stories


First Street Foundation Helps Homeowners Calculate Wildfire Threat Score

More homes are being destroyed by wildfires than ever before, but risk assessments from the First Street Foundation offer personalized solutions for at-risk properties


Americans Are Relocating to Climate Havens to Escape Extreme Weather

Those living in climate danger zones are migrating to safe haven metros in the Northeast and Midwest



Eco-Friendly Features Can Speed Along Home Sales and Boost Value

Demand for climate-conscious home features is growing in the wake of destructive and widespread weather emergencies


More in Category


Create an account

By creating an account, you agree to Pro Builder's terms of service and privacy policy.

Daily Feed Newsletter

Get Pro Builder in your inbox

Each day, Pro Builder's editors assemble the latest breaking industry news, hottest trends, and most relevant research, delivered to your inbox.

Save the stories you care about

Lorem ipsum dolor sit amet lorem ipsum dolor sit amet lorem ipsum dolor sit amet.

The bookmark icon allows you to save any story to your account to read it later
Tap it once to save, and tap it again to unsave

It looks like you’re using an ad-blocker!

Pro Builder is an advertisting supported site and we noticed you have ad-blocking enabled in your browser. There are two ways you can keep reading:

Disable your ad-blocker
Disable now
Subscribe to Pro Builder
Already a member? Sign in
Become a Member

Subscribe to Pro Builder for unlimited access

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.