Table 2 - Temperature of dew point in degrees Fahrenheit

[Pressure = 29.00 inches]

Air
Temp
t

Vapor
Press.
e

Depression of wet-bulb thermometer (t-t')
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
-10 0.0222 -12 -14 -17 -19 -23 -27 -32 -40 -56
-9 0.0234 -11 -13 -15 -18 -21 -25 -29 -36 -47
-8 0.0247 -10 -12 -14 -16 -19 -23 -27 -32 -41 -55
-7 0.0260 -9 -11 -13 -15 -18 -21 -24 -29 -35 -46
-6 0.0275 -8 -10 -12 -14 -16 -19 -22 -26 -32 -40 -54        
-5 0.0291 -7 -8 -10 -12 -15 -17 -20 -24 -29 -35 -45
-4 0.0307 -5 -7 -9 -11 -13 -16 -18 -22 -26 -30 -38 -50
-3 0.0325 -4 -6 -8 -10 -12 -14 -16 -19 -23 -27 -32 -42 -59
-2 0.0344 -3 -5 -6 -8 -10 -12 -15 -17 -20 -24 -29 -35 -47
-1 0.0363 -2 -4 -5 -7 -6 -11 -13 -15 -18 -21 -25 -30 -38 -51  
0 0.0383 -1 -3 -4 -5 -7 -9 -11 -13 -16 -19 -22 -26 -32 -40 -57
+1 0.0403 0 -2 -3 -4 -6 -7 -9 -12 -14 -16 -19 -23 -28 -34 -44
2 0.0423 +1 0 -2 -3 -5 -6 -8 -10 -12 -14 -17 -20 -24 -29 -35
3 0.0444 2 +1 -1 -2 -3 -5 -6 -8 -10 -12 -15 -18 -21 -25 -30
4 0.0467 3 2 0 -1 -2 -4 -5 -7 -9 -11 -13 -15 -18 -22 -26
5 0.0491 4 3 +2 0 -1 -2 -4 -5 -7 -9 -11 -13 -16 -19 -22
6 0.0515 5 4 3 +1 0 -1 -2 -4 -5 -7 -9 -11 -14 -16 -19
7 0.0542 6 5 4 3 +1 0 -1 -3 -4 -5 -7 -9 -12 -14 -16
8 0.0570 7 6 5 4 3 +1 0 -1 -3 -4 -5 -7 -10 -12 -14
9 0.0600 8 7 6 5 4 3 +1 0 -1 -3 -4 -6 -8 -10 -12
10 0.0631 9 8 7 6 5 4 3 +1 0 -1 -2 -4 -6 -8 -10
11 0.0665 10 9 8 7 6 5 4 3 +2 0 -1 -2 -4 -6 -7
12 0.0699 11 10 9 9 8 7 6 4 3 +2 +1 -1 -2 -4 -5
13 0.0735 12 11 11 10 9 8 7 6 5 3 2 +1 -1 -2 -4
14 0.0772 13 12 12 11 10 9 8 7 6 5 4 3 +1 0 -2
15 0.0810 14 13 13 12 11 10 9 8 7 6 5 4 3 +1 0
16 0.0850 15 15 14 13 12 11 10 9 9 8 7 6 4 3 +2
17 0.0891 16 16 15 14 13 12 12 11 10 9 8 7 6 5 4
18 0.0933 17 17 16 15 14 14 13 12 11 10 9 8 7 6 5
19 0.0979 18 18 17 16 15 15 14 13 12 11 11 10 9 8 7
20 0.1026 19 19 18 17 17 16 15 14 13 13 12 11 10 9 8