Design conditions for the United States
From ASHRAE (1989), with permission
Notes:
State | Station | Latitude |
Longitude |
Elevation |
Winter |
Summer |
Prevailing wind |
Temperature |
||||||||||
Design dry bulb |
Design dry bulb and mean coincident wet bulb |
Mean daily range |
Design wet bulb |
Winter direction | Speed |
Summer direction | Median of annual extreme |
|||||||||||
99% |
97.5% |
1% |
2.5% |
1% |
2.5% |
Max. |
Min. |
|||||||||||
° |
' |
° |
' |
Feet |
°F |
°F |
°F |
°F |
°F |
°F |
°F |
Knots |
°F |
°F |
||||
Alaska |
Fairbanks AP |
64 |
49 |
147 |
52 |
436 |
-51 |
-47 |
82/62 |
78/60 |
24 |
64 |
62 |
N |
5 |
S |
- | - |
Arizona |
Phoenix AP |
33 |
26 |
112 |
1 |
1112 |
31 |
34 |
109/71 |
107/71 |
27 |
76 |
75 |
E |
4 |
W |
112.8 |
26.7 |
California |
Los Angeles Co |
34 |
3 |
118 |
14 |
270 |
37 |
40 |
93/70 |
89/70 |
20 |
72 |
71 |
NW |
4 |
NW |
98.1 |
35.9 |
Sacramento AP |
38 |
31 |
121 |
30 |
17 |
30 |
32 |
101/70 |
98/70 |
36 |
72 |
71 |
NNW |
6 |
SW |
105.1 |
27.6 |
|
San Francisco Co |
37 |
46 |
122 |
26 |
72 |
38 |
40 |
74/63 |
71/62 |
14 |
64 |
62 |
W |
5 |
W |
91.3 |
35.9 |
|
Colorado |
Denver AP |
39 |
45 |
104 |
52 |
5283 |
-5 |
1 |
93/59 |
91/59 |
28 |
64 |
63 |
S |
8 |
SE |
96.8 |
-10.4 |
District of Columbia |
Washington National AP |
38 |
51 |
77 |
2 |
14 |
14 |
17 |
93/75 |
91/74 |
18 |
78 |
77 |
WNW |
11 |
S |
97.6 |
7.4 |
Florida |
Miami AP |
25 |
48 |
80 |
16 |
7 |
44 |
47 |
91/77 |
90/77 |
15 |
79 |
79 |
NNW |
8 |
SE |
92.5 |
39.0 |
Georgia |
Atlanta AP |
33 |
39 |
84 |
26 |
1010 |
17 |
22 |
94/74 |
92/74 |
19 |
77 |
76 |
NW |
11 |
NW |
95.7 |
11.9 |
Hawaii |
Honolulu AP |
21 |
20 |
157 |
55 |
13 |
62 |
63 |
87/73 |
86/73 |
12 |
76 |
75 |
ENE |
12 |
ENE |
- | - |
Idaho |
Boise AP |
43 |
34 |
116 |
13 |
2838 |
3 |
10 |
96/65 |
94/64 |
31 |
68 |
66 |
SE |
6 |
NW |
103.2 |
0.6 |
Illinois |
Chicago Midway AP |
41 |
47 |
87 |
45 |
607 |
-5 |
0 |
94/74 |
91/73 |
20 |
77 |
75 |
NW |
11 |
SW |
- | - |
Kentucky |
Louisville AP | 38 |
11 |
85 |
44 |
477 |
5 |
10 |
95/74 |
93/74 |
23 |
79 |
77 |
NW |
8 |
SW |
97.4 |
1.2 |
Louisiana |
Lake Charles AP |
30 |
7 |
93 |
13 |
9 |
27 |
31 |
95/77 |
93/77 |
17 |
80 |
79 |
N |
9 |
SSW |
99.2 |
20.5 |
Massachusetts |
Boston AP |
42 |
22 |
71 |
2 |
15 |
6 |
9 |
91/73 |
88/71 |
16 |
75 |
74 |
WNW |
16 |
SW |
95.7 |
-1.2 |
State | Station | Latitude |
Longitude |
Elevation |
Winter |
Summer |
Prevailing wind |
Temperature |
||||||||||
Design dry bulb |
Design dry bulb and mean coincident wet bulb |
Mean daily range |
Design wet bulb |
Winter direction | Speed |
Summer direction | Median of annual extreme |
|||||||||||
99% |
97.5% |
1% |
2.5% |
1% |
2.5% |
Max. |
Min. |
|||||||||||
° |
' |
° |
' |
Feet |
°F |
°F |
°F |
°F |
°F |
°F |
°F |
Knots |
°F |
°F |
||||
Minnesota |
Minneapolis/St. Paul AP |
44 |
53 |
93 |
13 |
834 |
-16 |
-12 |
92/75 |
89/73 |
22 |
77 |
75 |
NW |
8 |
S |
96.5 |
-22.0 |
Missouri |
Kansas City AP |
39 |
7 |
94 |
35 |
791 |
2 |
6 |
99/75 |
96/74 |
20 |
78 |
77 |
NW |
9 |
S |
100.2 |
-4.3 |
Nebraska |
Omaha AP |
41 |
18 |
95 |
54 |
977 |
-8 |
-3 |
94/76 |
91/75 |
22 |
78 |
77 |
NW |
8 |
S |
100.2 |
-13.2 |
New Mexico |
Albuquerque AP | 35 |
3 |
106 |
37 |
5311 |
12 |
16 |
96/61 |
94/61 |
27 |
66 |
65 |
N |
7 |
W |
98.1 |
5.1 |
New York |
NYC-Central Park |
40 |
47 |
73 |
58 |
157 |
11 |
15 |
92/74 |
89/73 |
17 |
76 |
75 |
- | - | - | 94.9 |
3.8 |
Oklahoma |
Oklahoma City AP |
35 |
24 |
97 |
36 |
1285 |
9 |
13 |
100/74 |
97/74 |
23 |
78 |
77 |
N |
14 |
SSW |
- | - |
Oregon |
Portland Co |
45 |
32 |
122 |
40 |
75 |
18 |
24 |
90/68 |
86/67 |
21 |
69 |
67 |
- | - | - | 97.6 |
20.5 |
Pennsylvania |
Philadelphia AP |
39 |
53 |
75 |
15 |
5 |
10 |
14 |
93/75 |
90/74 |
21 |
77 |
76 |
WNW |
10 |
WSW |
96.4 |
5.9 |
Pittsburgh AP |
40 |
30 |
80 |
13 |
1137 |
1 |
5 |
89/72 |
86/71 |
22 |
74 |
73 |
WSW |
10 |
WSW |
- | - | |
Tennessee |
Nashville AP |
36 |
7 |
86 |
41 |
590 |
9 |
14 |
97/75 |
94/74 |
21 |
78 |
77 |
NW |
8 |
WSW |
- | - |
Texas |
El Paso AP |
31 |
48 |
106 |
24 |
3918 |
20 |
24 |
100/64 |
98/64 |
27 |
69 |
68 |
N |
7 |
S |
103.0 |
15.7 |
Houston Co |
29 |
59 |
95 |
22 |
108 |
28 |
33 |
97/77 |
95/77 |
18 |
80 |
79 |
- | - | - | 99.0 |
23.5 |
|
Utah |
Salt Lake City |
40 |
46 |
111 |
58 |
4220 |
3 |
8 |
97/62 |
95/62 |
32 |
66 |
65 |
SSE |
6 |
N |
99.4 |
-0.1 |
Washington |
Seattle Co |
47 |
39 |
122 |
18 |
20 |
22 |
27 |
85/68 |
82/66 |
19 |
69 |
67 |
N |
7 |
N |
90.2 |
22.0 |
Wisconsin |
Madison AP |
43 |
8 |
89 |
20 |
858 |
-11 |
-7 |
91/74 |
88/73 |
22 |
77 |
75 |
NW |
8 |
SW |
93.6 |
-16.8 |