Climate ZonesVirginiaNewport News

What Climate Zone is Newport News, Virginia?

Newport News is in IECC Climate Zone 4A (Mixed - Humid). Get accurate Manual J load calculations with official design temperatures for Newport News.

Climate Zone
4A
Winter Design
13°F
Summer Design
91°F
ZIP Codes
11

Newport News HVAC Contractors: Get Your Free Manual J Report

Climate Zone 4A requires precise load calculations. Upload your Newport News blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Newport News's exact design temperatures (13°F winter / 91°F summer).

Claim Free Report
No credit card required

Verify Your Newport News ZIP Code

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

Newport News covers 11 ZIP codes: 23601, 23602, 23603, 23604, 23605, 23606, 23607, 23608, 23609, 23612 and 1 more

Newport News Design Temperatures

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

Winter 99% Design Temp
13°F
Summer 1% Design Temp
91°F
Summer Wet Bulb
75°F

IECC Requirements for Zone 4A

Minimum insulation and window requirements for Newport News per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-49
Floor Insulation:R-19
Window U-Factor:0.32
Window SHGC:0.4

Energy Code: 2021 IECC

Recommended HVAC Equipment for Newport News

Heating Systems

Gas furnace (90%+ AFUE)
Heat pump
Typical AFUE
92-96%

Cooling Systems

AC (14-16 SEER)
Heat pump
Typical SEER
14-16 SEER

Related Climate Zone Pages

Learn More About
Climate Zone 4A
View All Zones in
Virginia
HVAC Permits for
Newport News, Virginia

Get Free Manual J Calculations for Newport News

Upload your Newport News blueprint and get a professional Manual J load calculation using official Zone 4A design temperatures. First report is FREE.

Newport News design temps
Zone 4A compliant
Ready in 60 seconds
Upload Blueprint → Get Free Report

Join 10,000+ Newport News contractors who trust AutoHVAC