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» 2021 IECC Climate-Specific Building Assemblies
2021 IECC Climate-Specific Building Assemblies
Click on your climate zone to get started!
Help me find my Climate Zone
About this tool
U.S. Map of Climate Zones by County
1A
2A
2B
3A
3B
3C
4A
4B
4C
5A
5B
5C
6A
6B
7
8
HI
AK
FL
NH
MI
VT
ME
RI
NY
PA
NJ
DE
MD
VA
WV
OH
IN
IL
CT
WI
NC
MA
MO
GA
SC
KY
AL
LA
MS
IA
MN
OK
TX
NM
KS
NE
SD
ND
WY
MT
CO
ID
UT
AZ
NV
OR
WA
CA
DC
TN
AR
IECC Climate Zones
1A: Very Hot Humid
2A: Hot Humid
2B: Hot Dry
3A: Warm Humid
3B: Warm Dry
3C: Warm Marine
4A: Mixed Humid
4B: Mixed Dry
4C: Mixed Marine
5A: Cool Humid
5B: Cool Dry
5C: Cool Marine
6A: Cold Humid
6B: Cold Dry
7: Very Cold
8: Subarctic