Missouri HVAC Climate Zones

Missouri spans 2 IECC climate zones. Find your exact zone, design temperatures, and get free Manual J load calculations for any Missouri location.

Find Your Missouri Climate Zone

Climate Zones in Missouri

Climate Zone 4A

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Mixed - Humid

Design Temperatures

Winter
13°F
Summer
91°F
Wet Bulb
75°F

IECC 2021 Requirements

Wall:R-20
Roof:R-49
Floor:R-19
Window U:0.32

Load Characteristic

Balanced Loads
humid Climate

Climate Zone 5A

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Cool - Humid

Design Temperatures

Winter
0°F
Summer
91°F
Wet Bulb
75°F

IECC 2021 Requirements

Wall:R-20
Roof:R-49
Floor:R-30
Window U:0.3

Load Characteristic

Heating-Dominated
humid Climate

Recommended Equipment for Missouri

Based on Climate Zone 4A (Mixed - Humid), here are typical HVAC equipment specifications for Missouri installations.

Heating Systems

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

Annual Fuel Utilization Efficiency for Missouri furnaces

Cooling Systems

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

Seasonal Energy Efficiency Ratio for Missouri AC systems

Why Accurate Climate Data Matters in Missouri

Accurate Sizing

Missouri's climate zone data ensures proper equipment sizing. No more callbacks from oversized or undersized systems.

Code Compliance

Missouri building departments require IECC-compliant Manual J calculations. Our tool uses official Missouri climate data.

Energy Savings

Right-sized systems based on Missouri climate data reduce energy costs for homeowners and improve your reputation.

Get Free Manual J Calculations for Missouri

Upload your Missouri blueprint and get a professional Manual J load calculation with official climate zone data. First report is FREE.

Zone 4A design temps
IECC 2021 compliant
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Climate Zones by City in Missouri

Get detailed climate zone information for major cities

Saint Louis
Zone 4A
Kansas City
Zone 4A
Springfield
Zone 4A
St. Louis City
Zone 4A
Jefferson
Zone 4A
Franklin
Zone 4A
Washington
Zone 4A
St. Francois
Zone 4A
Gasconade
Zone 4A
St. Charles
Zone 4A
Pike
Zone 5A
Montgomery
Zone 4A
Lincoln
Zone 4A
Audrain
Zone 4A
Warren
Zone 4A
Callaway
Zone 4A
Marion
Zone 5A
Clark
Zone 5A
Macon
Zone 5A
Scotland
Zone 5A
Shelby
Zone 5A
Lewis
Zone 5A
Ralls
Zone 5A
Knox
Zone 5A
Monroe
Zone 4A
Adair
Zone 5A
Schuyler
Zone 5A
Sullivan
Zone 5A
Putnam
Zone 5A
Linn
Zone 5A
Iron
Zone 4A
Reynolds
Zone 4A
Ste. Genevieve
Zone 4A
Madison
Zone 4A
Bollinger
Zone 4A
Cape Girardeau
Zone 4A
Stoddard
Zone 4A
Perry
Zone 4A
Scott
Zone 4A
Wayne
Zone 4A
Mississippi
Zone 4A
Dunklin
Zone 4A
Pemiscot
Zone 4A
New Madrid
Zone 4A
Butler
Zone 4A
Ripley
Zone 4A
Carter
Zone 4A
Lafayette
Zone 4A
Cass
Zone 4A
Jackson
Zone 4A
Ray
Zone 4A
Platte
Zone 4A
Johnson
Zone 4A
Clay
Zone 4A
Buchanan
Zone 5A
Gentry
Zone 5A
Andrew
Zone 5A
DeKalb
Zone 5A
Nodaway
Zone 5A
Harrison
Zone 5A
Clinton
Zone 5A
Holt
Zone 5A
Worth
Zone 5A
Atchison
Zone 5A
Livingston
Zone 5A
Daviess
Zone 5A
Carroll
Zone 4A
Caldwell
Zone 5A
Grundy
Zone 5A
Chariton
Zone 5A
Mercer
Zone 5A
Bates
Zone 4A
St. Clair
Zone 4A
Henry
Zone 4A
Vernon
Zone 4A
Cedar
Zone 4A
Barton
Zone 4A
Jasper
Zone 4A
McDonald
Zone 4A
Newton
Zone 4A
Lawrence
Zone 4A
Barry
Zone 4A
Osage
Zone 4A
Boone
Zone 4A
Morgan
Zone 4A
Maries
Zone 4A
Miller
Zone 4A
Moniteau
Zone 4A
Camden
Zone 4A
Cole
Zone 4A
Cooper
Zone 4A
Howard
Zone 4A
Randolph
Zone 4A
Pettis
Zone 4A
Saline
Zone 4A
Benton
Zone 4A
Phelps
Zone 4A
Shannon
Zone 4A
Dent
Zone 4A
Crawford
Zone 4A
Texas
Zone 4A
Pulaski
Zone 4A
Laclede
Zone 4A
Howell
Zone 4A
Dallas
Zone 4A
Polk
Zone 4A
Dade
Zone 4A
Greene
Zone 4A
Oregon
Zone 4A
Douglas
Zone 4A
Ozark
Zone 4A
Christian
Zone 4A
Stone
Zone 4A
Taney
Zone 4A
Hickory
Zone 4A
Webster
Zone 4A
Wright
Zone 4A

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