Table 6 - Relative humidity, percent - Fahrenheit temperatures

[Pressure = 30.00 inches]

Air
Temp
t

Depression of wet-bulb thermometer (t-t')
0.1 0.2 0.3 0.4 0.5
-50 50
-49 54 5
-48 57 12
-47 60 17
-46 63 22      
-45 66 28
-44 68 32
-43 70 36 3
-42 71 40 9
-41 72 43 14    
-40 73 46 18
-39 74 48 22
-38 75 50 25 2
-37 76 53 28 6
-36 77 56 33 10  
-35 78 59 37 15
-34 80 61 41 20 0
-33 81 63 44 24 5
-32 82 64 46 28 10
-31 83 66 49 32 15
-30 84 68 52 36 20