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')
8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0
22 0.113 -37
23 0.118 -28 -50
24 0.124 -21 -32                            
25 0.130 -16 -24 -42
26 0.136 -12 -18 -29 -56
27 0.143 -8 -14 21 -34
28 0.150 -5 -10 -16 -24 -43
29 0.157 -2 -6 -11 -18 -29 -57                    
30 0.164 0 -3 -7 -13 -21 -33
31 0.172 +3 0 -4 -9 -15 -23 -40
32 0.180 5 +2 -1 -5 -10 -16 -26 -50
33 0.187 8 5 +2 -2 -6 -11 -18 -30
34 0.195 10 7 4 +1 -3 -7 -12 -20 -34              
35 0.203 12 9 7 4 0 -3 -8 -14 -22 -40
36 0.211 13 11 9 6 +3 0 -4 -9 -15 -25 -47
37 0.219 15 13 11 9 6 +3 -1 -5 -10 -17 -28 -60
38 0.228 17 15 13 11 8 6 +2 -1 -5 -11 -18 -31
39 0.237 19 17 15 13 11 8 5 +2 -2 -6 -12 -20 -34      
40 0.247 20 19 17 15 13 10 8 5 +1 -2 -7 -13 -22 -39
41 0.256 22 20 19 17 15 12 10 8 5 +1 -3 -8 -14 -23 -45
42 0.266 23 22 20 18 17 14 12 10 7 4 +1 -3 -8 -15 25 -50
43 0.277 24 23 22 20 18 16 14 12 10 7 4 0 -4 -9 -16 -27
44 0.287 26 24 23 22 20 18 16 14 12 10 7 +4 0 -4 -10 -17
45 0.298 27 26 24 23 21 20 18 16 14 12 10 7 +4 0 -5 -10
46 0.310 28 27 26 24 23 21 20 18 16 14 12 10 7 +3 -1 -5
47 0.322 30 28 27 26 24 23 21 20 18 16 14 12 9 7 +3 -1
48 0.334 31 30 28 27 26 24 23 21 20 18 16 14 12 9 6 +3
49 0.347 32 31 30 28 27 26 24 23 21 20 18 16 14 11 9 6