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Appendix B Rates of Rainfall for Various Cities

State amendments integrated3 filed sections2024 editionEffective January 1, 2026
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Appendix B Rates of Rainfall For Various Cities

This appendix is informative and is not part of the code.

Section B101 Rates of Rainfall for Various Cities

B101.1 General.

Rates of rainfall for various United States cities are listed in Table B101.1.

TABLE B101.1 RATES OF RAINFALL FOR VARIOUS CITIESa

Alabama:

 Birmingham

3.8

 Huntsville

3.6

 Mobile

4.6

 Montgomery

4.2

Alaska:

 Fairbanks

1.0

 Juneau

0.6

Arizona:

 Flagstaff

2.4

 Nogales

3.1

 Phoenix

2.5

 Yuma

1.6

Arkansas:

 Fort Smith

3.6

 Little Rock

3.7

 Texarkana

3.8

California:

 Barstow

1.4

 Crescent City

1.5

 Fresno

1.1

 Los Angeles

2.1

 Needles

1.6

 Placerville

1.5

 San Fernando

2.3

 San Francisco

1.5

 Yreka

1.4

Colorado:

 Craig

1.5

 Denver

2.4

 Durango

1.8

 Grand Junction

1.7

 Lamar

3.0

 Pueblo

2.5

Connecticut:

 Hartford

2.7

 New Haven

2.8

 Putnam

2.6

Delaware:

 Georgetown

3.0

 Wilmington

3.1

District of Columbia:

 Washington

3.2

Florida:

 Jacksonville

4.3

 Key West

4.3

 Miami

4.7

 Pensacola

4.6

 Tampa

4.5

Georgia:

 Atlanta

3.7

 Dalton

3.4

 Macon

3.9

 Savannah

4.3

 Thomasville

4.3

Hawaii:

 Hilo

6.2

 Honolulu

3.0

 Wailuku

3.0

Idaho:

 Boise

0.9

 Lewiston

1.1

 Pocatello

1.2

Illinois:

 Cairo

3.3

 Chicago

3.0

 Peoria

3.3

 Rockford

3.2

 Springfield

3.3

Indiana:

 Evansville

3.2

 Fort Wayne

2.9

 Indianapolis

3.1

Iowa:

 Davenport

3.3

 Des Moines

3.4

 Dubuque

3.3

 Sioux City

3.6

Kansas:

 Atwood

3.3

 Dodge City

3.3

 Topeka

3.7

 Wichita

3.7

Kentucky:

 Ashland

3.0

 Lexington

3.1

 Louisville

3.2

 Middlesboro

3.2

 Paducah

3.3

Louisiana:

 Alexandria

4.2

 Lake Providence

4.0

 New Orleans

4.8

 Shreveport

3.9

Maine:

 Bangor

2.2

 Houlton

2.1

 Portland

2.4

Maryland:

 Baltimore

3.2

 Hagerstown

2.8

 Oakland

2.7

 Salisbury

3.1

Massachusetts:

 Boston

2.5

 Pittsfield

2.8

 Worcester

2.7

Michigan:

 Alpena

2.5

 Detroit

2.7

 Grand Rapids

2.6

 Lansing

2.8

 Marquette

2.4

 Sault Ste. Marie

2.2

Minnesota:

 Duluth

2.8

 Grand Marais

2.3

 Minneapolis

3.1

 Moorhead

3.2

 Worthington

3.5

Mississippi:

 Biloxi

4.7

 Columbus

3.9

 Corinth

3.6

 Natchez

4.4

 Vicksburg

4.1

Missouri:

 Columbia

3.2

 Kansas City

3.6

 Springfield

3.4

 St. Louis

3.2

Montana:

 Ekalaka

2.5

 Havre

1.6

 Helena

1.5

 Kalispell

1.2

 Missoula

1.3

Nebraska:

 North Platte

3.3

 Omaha

3.8

 Scottsbluff

3.1

 Valentine

3.2

Nevada:

 Elko

1.0

 Ely

1.1

 Las Vegas

1.4

 Reno

1.1

New Hampshire:

 Berlin

2.5

 Concord

2.5

 Keene

2.4

New Jersey:

 Atlantic City

2.9

 Newark

3.1

 Trenton

3.1

New Mexico:

 Albuquerque

2.0

 Hobbs

3.0

 Raton

2.5

 Roswell

2.6

 Silver City

1.9

New York:

 Albany

2.5

 Binghamton

2.3

 Buffalo

2.3

 Kingston

2.7

 New York

3.0

 Rochester

2.2

North Carolina:

 Asheville

4.1

 Charlotte

3.7

 Greensboro

3.4

 Wilmington

4.2

North Dakota:

 Bismarck

2.8

 Devils Lake

2.9

 Fargo

3.1

 Williston

2.6

Ohio:

 Cincinnati

2.9

 Cleveland

2.6

 Columbus

2.8

 Toledo

2.8

Oklahoma:

 Altus

3.7

 Boise City

3.3

 Durant

3.8

 Oklahoma City

3.8

Oregon:

 Baker

0.9

 Coos Bay

1.5

 Eugene

1.3

 Portland

1.2

Pennsylvania:

 Erie

2.6

 Harrisburg

2.8

 Philadelphia

3.1

 Pittsburgh

2.6

 Scranton

2.7

Rhode Island:

 Block Island

2.75

 Providence

2.6

South Carolina:

 Charleston

4.3

 Columbia

4.0

 Greenville

4.1

South Dakota:

 Buffalo

2.8

 Huron

3.3

 Pierre

3.1

 Rapid City

2.9

 Yankton

3.6

Tennessee:

 Chattanooga

3.5

 Knoxville

3.2

 Memphis

3.7

 Nashville

3.3

Texas:

 Abilene

3.6

 Amarillo

3.5

 Brownsville

4.5

 Dallas

4.0

 Del Rio

4.0

 El Paso

2.3

 Houston

4.6

 Lubbock

3.3

 Odessa

3.2

 Pecos

3.0

 San Antonio

4.2

Utah:

 Brigham City

1.2

 Roosevelt

1.3

 Salt Lake City

1.3

 St. George

1.7

Vermont:

 Barre

2.3

 Bratteboro

2.7

 Burlington

2.1

 Rutland

2.5

Virginia:

 Bristol

2.7

 Charlottesville

2.8

 Lynchburg

3.2

 Norfolk

3.4

 Richmond

3.3

Washington:

 Omak

1.1

 Port Angeles

1.1

 Seattle

1.4

 Spokane

1.0

 Yakima

1.1

West Virginia:

 Charleston

2.8

 Morgantown

2.7

Wisconsin:

 Ashland

2.5

 Eau Claire

2.9

 Green Bay

2.6

 La Crosse

3.1

 Madison

3.0

 Milwaukee

3.0

Wyoming:

 Cheyenne

2.2

 Fort Bridger

1.3

 Lander

1.5

 New Castle

2.5

 Sheridan

1.7

 Yellowstone Park

1.4

  1. a.

    Rainfall rates, in inches per hour, are based on a storm of 1-hour duration and a 100-year return period. The rainfall rates shown in the appendix are derived from Figures 1106.1(1) through 1106.1(5).

Source and transcript record

Record Georgia · 2024 IPC · Appendix B Rates of Rainfall for Various Cities

Effective January 1, 2026 · source captured Aug 30, 2026

Transcript SHA-256 a35ab6627954cefdca106ad2ff70f47493634f63932e274c2ae8727f46c26988 · text SHA-256 51e4b675811fda549ae20efeef96f9ea37477f7b237399066895072d46d8dab0

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