Table 5 - Temperature of dew point in degrees Fahrenheit

[Pressure = 23.00 inches]

Air
Temp
t

Vapor
Press.
e

Depression of wet-bulb thermometer (t-t')
24.5 25.0 25.5 26.0 26.5 27.0 27.5 28.0 28.5 29.0 29.5 30.0 30.5 31.0 31.5 32.0
61 0.536 -29                              
62 0.555 -16 -29
63 0.575 -8 -16 -28
64 0.595 -2 -7 -15 -28
65 0.616 +2 -2 -7 -15 -28
66 0.638 7 +3 -2 -7 -15 -27                    
67 0.661 10 7 +3 -1 -7 -14 -27
68 0.684 13 10 7 +3 -1 -6 -14 -26
69 0.707 16 13 11 8 +4 -1 -6 -13 -25
70 0.732 18 16 14 11 8 +4 0 -5 -13 -24
71 0.757 21 19 17 14 11 8 +5 0 -5 -12 -23 -54        
72 0.783 23 21 19 17 14 12 9 +5 +1 -4 -11 -22 -50
73 0.810 25 23 22 20 17 15 12 9 6 +1 -4 -11 -20 -45
74 0.838 27 26 24 22 20 18 15 12 10 6 +2 -3 -10 -19 -41
75 0.866 29 28 26 24 22 20 18 15 13 10 7 +2 -3 -9 -18 -37
76 0.896 31 29 28 26 24 23 21 18 16 13 10 7 +3 -2 -8 -17
77 0.926 33 31 30 28 27 25 23 21 19 16 14 11 8 +4 -1 -7
78 0.957 35 33 32 30 29 27 25 23 21 19 17 14 11 8 +4 0
79 0.989 37 35 33 32 31 29 27 26 24 22 20 17 15 12 9 +5
80 1.022 38 37 35 34 32 31 29 28 26 24 22 20 18 15 12 9