Climate ZonesIndianaVigo

What Climate Zone is Vigo, Indiana?

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

Climate Zone
5A
Winter Design
0°F
Summer Design
91°F
ZIP Codes
20

Vigo HVAC Contractors: Get Your Free Manual J Report

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

Claim Free Report
No credit card required

Verify Your Vigo ZIP Code

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

Vigo covers 20 ZIP codes: 47802, 47803, 47804, 47805, 47807, 47863, 47866, 47876, 47885, 47801 and 10 more

Vigo Design Temperatures

Official ASHRAE design temperatures for Vigo, 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 Vigo 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: 2020 IECC

Recommended HVAC Equipment for Vigo

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
Indiana
HVAC Permits for
Vigo, Indiana

Get Free Manual J Calculations for Vigo

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

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

Join 10,000+ Vigo contractors who trust AutoHVAC