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