Dry Bulb
Temp
(°F )
Table of Dewpoint as a Function of Dry Bulb and Relative Humidity
Relative Humidity (%)
36
38
40
42
44
46
48
50
55
60
65
70
75
80
85
90
95
100
-4
-25.0
-23.9
-22.9
-22.0
-21.1
-20.2
-19.4
-18.5
-16.6
-14.9
-13.2
-11.7
-10.3
-9.0
-7.7
-6.5
-5.3
-4
-2
-23.1
-22.1
-21.1
-20.1
-19.2
-18.3
-17.5
-16.6
-14.7
-12.9
-11.3
-9.8
-8.3
-7.0
-5.7
-4.5
-3.3
-2
0
-21.3
-20.2
-19.2
-18.2
-17.3
-16.4
-15.6
-14.7
-12.8
-11.0
-9.3
-7.8
-6.3
-5.0
-3.7
-2.5
-1.3
0
2
-19.4
-18.4
-17.3
-16.4
-15.4
-14.5
-13.7
-12.8
-10.9
-9.1
-7.4
-5.8
-4.4
-3.0
-1.7
-0.5
0.7
2
4
-17.6
-16.5
-15.5
-14.5
-13.5
-12.6
-11.8
-10.9
-8.9
-7.1
-5.4
-3.9
-2.4
-1.0
0.3
1.6
2.7
4
6
-15.8
-14.7
-13.6
-12.6
-11.7
-10.8
-9.9
-9.0
-7.0
-5.2
-3.5
-1.9
-0.4
1.0
2.3
3.6
4.8
6
8
-13.9
-12.8
-11.8
-10.8
-9.8
-8.9
-8.0
-7.1
-5.1
-3.3
-1.5
0.1
1.6
3.0
4.3
5.6
6.8
8
10
-12.1
-11.0
-9.9
-8.9
-7.9
-7.0
-6.1
-5.2
-3.2
-1.3
0.4
2.0
3.5
5.0
6.3
7.6
8.8
10
12
-10.2
-9.1
-8.1
-7.0
-6.0
-5.1
-4.2
-3.3
-1.3
0.6
2.3
4.0
5.5
6.9
8.3
9.6
10.8
12
14
-8.4
-7.3
-6.2
-5.2
-4.2
-3.2
-2.3
-1.4
0.6
2.5
4.3
5.9
7.5
8.9
10.3
11.6
12.8
14
16
-6.6
-5.4
-4.4
-3.3
-2.3
-1.4
-0.4
0.4
2.5
4.4
6.2
7.9
9.4
10.9
12.3
13.6
14.8
16
18
-4.8
-3.6
-2.5
-1.5
-0.5
0.5
1.4
2.3
4.4
6.4
8.1
9.8
11.4
12.9
14.3
15.6
16.8
18
20
-2.9
-1.8
-0.7
0.4
1.4
2.4
3.3
4.2
6.3
8.3
10.1
11.8
13.3
14.8
16.2
17.6
18.8
20
22
-1.1
0.1
1.2
2.2
3.3
4.2
5.2
6.1
8.2
10.2
12.0
13.7
15.3
16.8
18.2
19.6
20.8
22
24
0.7
1.9
3.0
4.1
5.1
6.1
7.1
8.0
10.1
12.1
13.9
15.7
17.3
18.8
20.2
21.6
22.8
24
26
2.5
3.7
4.9
5.9
7.0
8.0
8.9
9.9
12.0
14.0
15.9
17.6
19.2
20.7
22.2
23.5
24.8
26
28
4.4
5.6
6.7
7.8
8.8
9.8
10.8
11.7
13.9
15.9
17.8
19.5
21.2
22.7
24.2
25.5
26.8
28
30
6.2
7.4
8.5
9.6
10.7
11.7
12.7
13.6
15.8
17.8
19.7
21.5
23.1
24.7
26.1
27.5
28.8
30
32
8.0
9.2
10.4
11.5
12.5
13.6
14.5
15.5
17.7
19.7
21.6
23.4
25.1
26.6
28.1
29.5
30.8
32
34
9.8
11.0
12.2
13.3
14.4
15.4
16.4
17.3
19.6
21.6
23.6
25.3
27.0
28.6
30.1
31.5
32.8
34
36
11.6
12.8
14.0
15.1
16.2
17.3
18.3
19.2
21.5
23.5
25.5
27.3
29.0
30.5
32.1
33.5
34.8
36
38
13.4
14.7
15.8
17.0
18.1
19.1
20.1
21.1
23.4
25.4
27.4
29.2
30.9
32.5
34.0
35.5
36.8
38
40
15.2
16.5
17.7
18.8
19.9
21.0
22.0
22.9
25.2
27.3
29.3
31.1
32.8
34.5
36.0
37.4
38.8
40
42
17.0
18.3
19.5
20.6
21.7
22.8
23.8
24.8
27.1
29.2
31.2
33.1
34.8
36.4
38.0
39.4
40.8
42
44
18.8
20.1
21.3
22.5
23.6
24.6
25.7
26.7
29.0
31.1
33.1
35.0
36.7
38.4
39.9
41.4
42.8
44
46
20.6
21.9
23.1
24.3
25.4
26.5
27.5
28.5
30.9
33.0
35.0
36.9
38.7
40.3
41.9
43.4
44.8
46
48
22.4
23.7
24.9
26.1
27.2
28.3
29.4
30.4
32.7
34.9
36.9
38.8
40.6
42.3
43.8
45.3
46.8
48
50
24.2
25.5
26.7
27.9
29.1
30.2
31.2
32.2
34.6
36.8
38.8
40.7
42.5
44.2
45.8
47.3
48.7
50
52
26.0
27.3
28.5
29.7
30.9
32.0
33.1
34.1
36.5
38.7
40.7
42.7
44.5
46.2
47.8
49.3
50.7
52
54
27.8
29.1
30.4
31.6
32.7
33.8
34.9
35.9
38.3
40.6
42.6
44.6
46.4
48.1
49.7
51.3
52.7
54
56
29.5
30.9
32.2
33.4
34.5
35.7
36.7
37.8
40.2
42.5
44.5
46.5
48.3
50.0
51.7
53.2
54.7
56
58
31.3
32.7
34.0
35.2
36.4
37.5
38.6
39.6
