Table 4. Design Outdoor Conditions - Nortec NHPC Engineer's Manual

State
Alabama Birmingham
Mobile
Arizona Flagstaff
Phoenix
Yuma
Arkansas Little Rock
California Eureka
Fresno
Los Angeles
Sacramento
San Diego
San Francisco
Colorado Denver
Grand Junction
Pueblo
Connecticut New Haven
Delaware Wilmington
District of Washington
Columbia
Florida Jacksonville
Miami
Georgia Atlanta
Augusta
Savannah
Idaho Boise
Lewiston
Illinois Cairo
Chicago
Peoria
Indiana Fort Wayne
Indianapolis
Terre Haute
Iowa Davenport
Sioux City
Kansas Dodge City
Topeka
Kentucky Louisville
Louisiana New Orleans
Shreveport
Maine Portland
Maryland Baltimore
Massachusetts Boston
Michigan Detroit
Grand Rapids
Minnesota Duluth
Minneapolis
Mississippi Vicksburg
Kansas City
Missouri St. Louis
Montana Billings
Butte
Nebraska North Platte
Omaha
Nevada Reno
New Hampshire Concord
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2008-10-01

Table 4. Design Outdoor Conditions

Dry
City °C Bulb
°F
-12 10
-12 10
-23 -10
-4 25
-1 30
-15 5
-1 30
-4 25
2 35
-1 30
2 35
2 35
-23 -10
-26 -15
-29 -20
-18 0
-18 0
-18 0
-4 25
2 35
-12 10
-12 10
-7 20
-23 -10
-20 -5
-18 0
-23 -10
-23 -10
-23 -10
-23 -10
-18 0
-26 -15
-29 -20
-23 -10
-23 -10
-18 0
-7 20
-7 20
-21 -5
-18 0
-18 0
-23 -10
-23 -10
-32 -25
-29 -20
-12 10
-23 -10
-18 0
-32 -25
-29 -20
-29 -20
-23 -10
-21 -5
-26 -15
JANUARY
Relative Humidity
(% RH)
Dry
7:30 1:30 7:30
Bulb
A.M. P.M. P.M.
°F
81 61 66 95
-- -- -- 95
83 58 -- 90
75 47 39 105
56 37 27 110
80 67 68 95
87 -- 77 90
93 80 66 105
63 46 51 90
90 82 70 100
76 58 60 85
84 68 70 85
54 37 41 95
77 64 64 95
67 44 48 95
75 65 69 95
77 62 70 95
73 56 64 95
89 56 75 95
87 59 75 91
80 64 69 95
84 59 69 98
83 58 72 95
82 75 74 95
79 73 71 95
81 69 -- 98
81 70 75 95
83 72 77 96
84 75 81 95
83 72 78 95
82 70 76 95
-- -- -- 95
78 67 72 95
78 57 61 95
78 64 67 100
78 68 69 95
85 67 73 95
83 67 66 100
81 65 74 90
72 68 56 95
72 59 67 92
82 71 77 95
85 78 80 95
78 74 74 93
82 72 75 95
82 65 67 95
78 64 66 100
77 65 68 95
67 73 60 90
76 70 71 95
80 62 66 85
82 68 73 95
82 67 54 95
78 60 69 90
JULY
Relative Humidity
(% RH)
7:30 1:30 7:30
°C
A.M. P.M. P.M.
84 56 68 35
90 64 78 35
77 36 -- 32
53 31 23 41
51 31 23 44
85 55 59 35
92 -- 80 32
61 36 20 41
85 50 54 32
76 46 28 38
86 68 65 29
92 75 78 29
55 27 30 35
48 27 22 35
73 34 35 35
77 64 74 35
80 52 69 35
78 52 64 35
85 57 76 35
83 64 76 33
83 57 68 35
83 55 69 37
85 61 80 35
54 34 23 35
64 37 25 35
83 57 -- 37
78 51 55 35
81 53 58 35
84 53 58 35
84 54 60 35
77 50 56 35
-- -- -- 35
86 55 54 35
77 45 52 35
85 54 54 38
77 52 57 35
84 64 72 35
86 56 62 38
78 58 76 32
71 52 65 35
72 55 70 33
74 50 56 35
76 51 54 35
87 61 66 33
82 54 54 35
87 61 70 35
76 48 47 38
73 50 55 35
65 40 33 32
82 36 33 35
84 50 46 29
80 51 51 35
72 25 20 35
80 49 69 32