Dry Bulb
Temp
(°F )
Table of Dewpoint as a Function of Dry Bulb and Relative Humidity
Relative Humidity (%)
10
11
12
13
14
15
16
17
18
19
20
22
24
26
28
30
32
34
-4
-48.5
-46.8
-45.3
-43.9
-42.6
-41.3
-40.2
-39.1
-38.0
-37.0
-36.1
-34.3
-32.7
-31.2
-29.8
-28.5
-27.3
-26.1
-2
-46.8
-45.1
-43.6
-42.2
-40.8
-39.6
-38.4
-37.3
-36.3
-35.3
-34.3
-32.6
-30.9
-29.4
-28.0
-26.7
-25.4
-24.3
0
-45.2
-43.5
-41.9
-40.5
-39.1
-37.9
-36.7
-35.6
-34.5
-33.5
-32.6
-30.8
-29.1
-27.6
-26.2
-24.9
-23.6
-22.4
2
-43.5
-41.8
-40.2
-38.8
-37.4
-36.2
-35.0
-33.9
-32.8
-31.8
-30.8
-29.0
-27.4
-25.8
-24.4
-23.0
-21.8
-20.6
4
-41.9
-40.1
-38.6
-37.1
-35.7
-34.5
-33.3
-32.1
-31.1
-30.0
-29.1
-27.3
-25.6
-24.0
-22.6
-21.2
-20.0
-18.7
6
-40.2
-38.5
-36.9
-35.4
-34.1
-32.8
-31.6
-30.4
-29.3
-28.3
-27.3
-25.5
-23.8
-22.2
-20.8
-19.4
-18.1
-16.9
8
-38.6
-36.8
-35.2
-33.7
-32.4
-31.1
-29.8
-28.7
-27.6
-26.6
-25.6
-23.7
-22.0
-20.5
-19.0
-17.6
-16.3
-15.1
10
-36.9
-35.2
-33.6
-32.1
-30.7
-29.4
-28.1
-27.0
-25.9
-24.8
-23.8
-22.0
-20.3
-18.7
-17.2
-15.8
-14.5
-13.3
12
-35.3
-33.5
-31.9
-30.4
-29.0
-27.7
-26.4
-25.3
-24.2
-23.1
-22.1
-20.2
-18.5
-16.9
-15.4
-14.0
-12.7
-11.4
14
-33.7
-31.9
-30.2
-28.7
-27.3
-26.0
-24.7
-23.6
-22.4
-21.4
-20.4
-18.5
-16.7
-15.1
-13.6
-12.2
-10.9
-9.6
16
-32.0
-30.2
-28.6
-27.1
-25.6
-24.3
-23.0
-21.8
-20.7
-19.6
-18.6
-16.7
-15.0
-13.3
-11.8
-10.4
-9.0
-7.8
18
-30.4
-28.6
-26.9
-25.4
-23.9
-22.6
-21.3
-20.1
-19.0
-17.9
-16.9
-15.0
-13.2
-11.6
-10.0
-8.6
-7.2
-6.0
20
-28.8
-27.0
-25.3
-23.7
-22.3
-20.9
-19.6
-18.4
-17.3
-16.2
-15.2
-13.2
-11.4
-9.8
-8.2
-6.8
-5.4
-4.1
22
-27.2
-25.3
-23.6
-22.1
-20.6
-19.2
-17.9
-16.7
-15.6
-14.5
-13.4
-11.5
-9.7
-8.0
-6.5
-5.0
-3.6
-2.3
24
-25.5
-23.7
-22.0
-20.4
-18.9
-17.6
-16.3
-15.0
-13.9
-12.8
-11.7
-9.7
-7.9
-6.2
-4.7
-3.2
-1.8
-0.5
26
-23.9
-22.1
-20.3
-18.7
-17.3
-15.9
-14.6
-13.3
-12.2
-11.1
-10.0
-8.0
-6.2
-4.5
-2.9
-1.4
0.0
1.3
28
-22.3
-20.4
-18.7
-17.1
-15.6
-14.2
-12.9
-11.6
-10.5
-9.3
-8.3
-6.3
-4.4
-2.7
-1.1
0.4
1.8
3.1
30
-20.7
-18.8
-17.1
-15.4
-13.9
-12.5
-11.2
-10.0
-8.8
-7.6
-6.6
-4.5
-2.7
-1.0
0.6
2.1
3.6
4.9
32
-19.1
-17.2
-15.4
-13.8
-12.3
-10.9
-9.5
-8.3
-7.1
-5.9
-4.8
-2.8
-0.9
0.8
2.4
3.9
5.4
6.7
34
-17.5
-15.6
-13.8
-12.2
-10.6
-9.2
-7.9
-6.6
-5.4
-4.2
-3.1
-1.1
0.8
2.5
4.2
5.7
7.1
8.5
36
-15.9
-13.9
-12.2
-10.5
-9.0
-7.5
-6.2
-4.9
-3.7
-2.5
-1.4
0.6
2.5
4.3
5.9
7.5
8.9
10.3
38
-14.3
-12.3
-10.5
-8.9
-7.3
-5.9
-4.5
-3.2
-2.0
-0.8
0.3
2.4
4.3
6.0
7.7
9.3
10.7
12.1
40
-12.7
-10.7
-8.9
-7.2
-5.7
-4.2
-2.8
-1.5
-0.3
0.9
2.0
4.1
6.0
7.8
9.5
11.0
12.5
13.9
42
-11.1
-9.1
-7.3
-5.6
-4.0
-2.6
-1.2
0.1
1.4
2.6
3.7
5.8
7.7
9.5
11.2
12.8
14.3
15.7
44
-9.5
-7.5
-5.7
-4.0
-2.4
-0.9
0.5
1.8
3.1
4.2
5.4
7.5
9.5
11.3
13.0
14.6
16.1
17.5
46
-7.9
-5.9
-4.1
-2.4
-0.8
0.7
2.1
3.5
4.7
5.9
7.1
9.2
11.2
13.0
14.7
16.3
17.8
19.3
48
-6.3
-4.3
-2.5
-0.7
0.9
2.4
3.8
5.1
6.4
7.6
8.8
10.9
12.9
14.8
16.5
18.1
19.6
21.0
50
-4.7
-2.7
-0.8
0.9
2.5
4.0
5.5
6.8
8.1
9.3
10.5
12.6
14.6
16.5
18.2
19.8
21.4
22.8
52
-3.2
-1.1
0.8
2.5
4.1
5.7
7.1
8.5
9.8
11.0
12.1
14.3
16.4
18.2
20.0
21.6
23.1
24.6
54
-1.6
0.5
2.4
4.1
5.8
7.3
8.8
10.1
