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
11.4
12.7
13.8
16.0
18.1
19.9
21.7
23.4
24.9
26.4
56
0.0
2.1
4.0
5.7
7.4
8.9
10.4
11.8
13.1
14.3
15.5
17.7
19.8
21.7
23.4
25.1
26.7
28.1
58
1.5
3.6
5.6
7.3
9.0
10.6
12.0
13.4
14.7
16.0
17.2
19.4
21.5
23.4
25.2
26.9
28.4
29.9
60
3.1
5.2
7.2
9.0
10.6
12.2
13.7
15.1
16.4
17.7
18.9
21.1
23.2
25.1
26.9
28.6
30.2
31.7
62
4.7
6.8
8.7
10.6
12.2
13.8
15.3
16.7
18.1
19.3
20.5
22.8
24.9
26.8
28.6
30.3
31.9
33.5
64
6.2
8.4
10.3
12.2
13.9
15.5
17.0
18.4
19.7
21.0
22.2
24.5
26.6
28.6
30.4
32.1
33.7
35.2
66
7.8
9.9
11.9
13.8
15.5
17.1
18.6
20.0
21.4
22.7
23.9
26.2
28.3
30.3
32.1
33.8
35.4
37.0
68
9.4
11.5
13.5
15.4
17.1
18.7
20.2
21.6
23.0
24.3
25.5
27.9
30.0
32.0
33.8
35.6
37.2
38.7
70
10.9
13.1
15.1
16.9
18.7
20.3
21.8
23.3
24.7
26.0
27.2
29.5
31.7
33.7
35.6
37.3
38.9
40.5
72
12.5
14.6
16.7
18.5
20.3
21.9
23.5
24.9
26.3
27.6
28.9
31.2
33.4
35.4
37.3
39.0
40.7
42.3
74
14.0
16.2
18.2
20.1
21.9
23.5
25.1
26.5
27.9
29.3
30.5
32.9
35.1
37.1
39.0
40.8
42.4
44.0
76
15.5
17.8
19.8
21.7
23.5
25.1
26.7
28.2
29.6
30.9
32.2
34.6
36.8
38.8
40.7
42.5
44.2
45.8
78
17.1
19.3
21.4
23.3
25.1
26.7
28.3
29.8
31.2
32.6
33.8
36.2
38.4
40.5
42.4
44.2
45.9
47.5
80
18.6
20.9
22.9
24.9
26.7
28.3
29.9
31.4
32.8
34.2
35.5
37.9
40.1
42.2
44.1
45.9
47.6
49.3
82
20.2
22.4
24.5
26.4
28.2
29.9
31.5
33.0
34.5
35.8
37.1
39.6
41.8
43.9
45.8
47.7
49.4
51.0
84
21.7
24.0
26.1
28.0
29.8
31.5
33.1
34.7
36.1
37.5
38.8
41.2
43.5
45.6
47.5
49.4
51.1
52.7
86
23.2
25.5
27.6
29.6
31.4
33.1
34.7
36.3
37.7
39.1
40.4
42.9
45.2
47.3
49.2
51.1
52.8
54.5
88
24.7
27.0
29.2
31.2
33.0
34.7
36.3
37.9
39.3
40.7
42.1
44.5
46.8
49.0
50.9
52.8
54.6
56.2
90
26.3
28.6
30.7
32.7
34.6
36.3
37.9
39.5
41.0
42.4
43.7
46.2
48.5
50.6
52.6
54.5
56.3
58.0
92
27.8
30.1
32.3
34.3
36.1
37.9
39.5
41.1
42.6
44.0
45.3
47.9
50.2
52.3
54.3
56.2
58.0
59.7
94
29.3
31.7
33.8
35.8
37.7
39.5
41.1
42.7
44.2
45.6
47.0
49.5
51.8
54.0
56.0
57.9
59.7
61.4
96
30.8
33.2
35.4
37.4
39.3
41.1
42.7
44.3
45.8
47.2
48.6
51.2
53.5
55.7
57.7
59.7
61.5
63.2
98
32.3
34.7
36.9
38.9
40.9
42.6
44.3
45.9
47.4
48.9
50.2
52.8
55.2
57.4
59.4
61.4
63.2
64.9
100
33.8
36.2
38.4
40.5
42.4
44.2
45.9
47.5
49.0
50.5
51.9
54.4
56.8
59.0
61.1
63.1
64.9
66.6
102
35.3
37.8
40.0
42.0
44.0
45.8
47.5
49.1
50.6
52.1
53.5
56.1
58.5
60.7
62.8
64.8
66.6
68.4
104
36.8
39.3
41.5
43.6
45.5
47.4
49.1
50.7
52.2
53.7
55.1
57.7
60.1
62.4
64.5
66.5
68.3
70.1
106
38.3
40.8
43.0
45.1
47.1
48.9
50.7
52.3
53.8
55.3
56.7
59.4
61.8
64.1
66.2
68.2
70.0
71.8
108
39.8
42.3
44.6
46.7
48.6
50.5
52.2
53.9
55.4
56.9
58.3
61.0
63.5
65.7
67.9
69.9
71.7
73.5
110
41.3
43.8
46.1
48.2
50.2
52.1
53.8
55.5
57.0
58.5
60.0
62.6
65.1
67.4
69.5
71.6
73.5
75.3
112
42.8
45.3
47.6
49.8
51.7
53.6
55.4
57.0
58.6
60.1
61.6
64.3
66.7
69.1
71.2
73.2
75.2
77.0
114
44.3
46.8
49.1
51.3
53.3
55.2
56.9
58.6
60.2
61.7
63.2
65.9
68.4
70.7
72.9
74.9
76.9
78.7
116
45.8
48.3
50.7
52.8
54.8
56.7
58.5
60.2
61.8
63.3
64.8
67.5
70.0
72.4
74.6
76.6
78.6
80.4
118
47.3
49.8
52.2
54.3
56.4
58.3
60.1
61.8
63.4
64.9
66.4
69.1
71.7
74.0
76.2
78.3
80.3
82.1
120
48.8
51.3
53.7
55.9
57.9
59.8
61.6
63.4
65.0
66.5
68.0
70.8
73.3
75.7
77.9
80.0
82.0
83.8
122
50.3
52.8
55.2
57.4
59.5
61.4
63.2
64.9
66.6
68.1
69.6
72.4
75.0
77.4
79.6
81.7
83.7
85.6

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