Climate ZonesWisconsinMadison

Madison, Wisconsin HVAC Climate Zone

Madison is located in IECC Climate Zone 5A (Cool - Humid). Get accurate Manual J load calculations with official design temperatures for Madison.

Climate Zone
5A
Winter Design
0°F
Summer Design
91°F
ZIP Codes
13

Madison HVAC Contractors: Get Your Free Manual J Report

Climate Zone 5A requires precise load calculations. Upload your Madison blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Madison's exact design temperatures (0°F winter / 91°F summer).

Claim Free Report
No credit card required

Verify Your Madison ZIP Code

Enter your ZIP code to confirm it's in Madison and get climate zone details.

Madison covers 13 ZIP codes: 53703, 53704, 53705, 53706, 53713, 53714, 53715, 53716, 53717, 53718 and 3 more

Madison Design Temperatures

Official ASHRAE design temperatures for Madison, used for accurate Manual J load calculations.

Winter 99% Design Temp
0°F
Summer 1% Design Temp
91°F
Summer Wet Bulb
75°F

IECC Requirements for Zone 5A

Minimum insulation and window requirements for Madison per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-49
Floor Insulation:R-30
Window U-Factor:0.3
Window SHGC:0.4

Energy Code: 2021 IECC

Recommended HVAC Equipment for Madison

Heating Systems

Gas furnace (95%+ AFUE)
Boiler
Heat pump (cold climate)
Typical AFUE
95-98%

Cooling Systems

AC (13-16 SEER)
Heat pump
Typical SEER
13-16 SEER

Related Climate Zone Pages

Learn More About
Climate Zone 5A
View All Zones in
Wisconsin
HVAC Permits for
Madison, Wisconsin

Get Free Manual J Calculations for Madison

Upload your Madison blueprint and get a professional Manual J load calculation using official Zone 5A design temperatures. First report is FREE.

Madison design temps
Zone 5A compliant
Ready in 60 seconds
Upload Blueprint → Get Free Report

Join 10,000+ Madison contractors who trust AutoHVAC