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
42.1
44.3
46.4
48.4
50.2
52.0
53.6
55.2
56.7
58
60
33.1
34.5
35.8
37.0
38.2
39.3
40.4
41.5
43.9
46.2
48.3
50.3
52.2
53.9
55.6
57.2
58.7
60
62
34.9
36.3
37.6
38.8
40.0
41.1
42.2
43.3
45.8
48.1
50.2
52.2
54.1
55.9
57.5
59.1
60.6
62
64
36.7
38.0
39.3
40.6
41.8
43.0
44.1
45.1
47.7
50.0
52.1
54.1
56.0
57.8
59.5
61.1
62.6
64
66
38.4
39.8
41.1
42.4
43.6
44.8
45.9
47.0
49.5
51.8
54.0
56.0
57.9
59.7
61.4
63.0
64.6
66
68
40.2
41.6
42.9
44.2
45.4
46.6
47.7
48.8
51.4
53.7
55.9
57.9
59.9
61.7
63.4
65.0
66.6
68
70
42.0
43.4
44.7
46.0
47.2
48.4
49.5
50.6
53.2
55.6
57.8
59.9
61.8
63.6
65.3
67.0
68.5
70
72
43.7
45.2
46.5
47.8
49.0
50.2
51.4
52.5
55.1
57.5
59.7
61.8
63.7
65.5
67.3
68.9
70.5
72
74
45.5
46.9
48.3
49.6
50.8
52.0
53.2
54.3
56.9
59.3
61.6
63.7
65.6
67.5
69.2
70.9
72.5
74
76
47.3
48.7
50.1
51.4
52.6
53.9
55.0
56.1
58.8
61.2
63.5
65.6
67.5
69.4
71.2
72.9
74.5
76
78
49.0
50.5
51.9
53.2
54.4
55.7
56.8
58.0
60.6
63.1
65.3
67.5
69.5
71.3
73.1
74.8
76.4
78
80
50.8
52.2
53.6
55.0
56.2
57.5
58.6
59.8
62.5
64.9
67.2
69.4
71.4
73.3
75.1
76.8
78.4
80
82
52.5
54.0
55.4
56.8
58.0
59.3
60.5
61.6
64.3
66.8
69.1
71.3
73.3
75.2
77.0
78.7
80.4
82
84
54.3
55.8
57.2
58.5
59.8
61.1
62.3
63.4
66.1
68.7
71.0
73.2
75.2
77.1
79.0
80.7
82.3
84
86
56.1
57.5
59.0
60.3
61.6
62.9
64.1
65.3
68.0
70.5
72.9
75.1
77.1
79.1
80.9
82.7
84.3
86
88
57.8
59.3
60.7
62.1
63.4
64.7
65.9
67.1
69.8
72.4
74.7
77.0
79.0
81.0
82.9
84.6
86.3
88
90
59.6
61.1
62.5
63.9
65.2
66.5
67.7
68.9
71.7
74.2
76.6
78.8
80.9
82.9
84.8
86.6
88.3
90
92
61.3
62.8
64.3
65.7
67.0
68.3
69.5
70.7
73.5
76.1
78.5
80.7
82.9
84.9
86.7
88.5
90.3
92
94
63.0
64.6
66.0
67.4
68.8
70.1
71.3
72.5
75.3
78.0
80.4
82.6
84.8
86.8
88.7
90.5
92.2
94
96
64.8
66.3
67.8
69.2
70.6
71.9
73.1
74.3
77.2
79.8
82.3
84.5
86.7
88.7
90.6
92.5
94.2
96
98
66.5
68.1
69.6
71.0
72.4
73.7
74.9
76.2
79.0
81.7
84.1
86.4
88.6
90.6
92.6
94.4
96.2
98
100
68.3
69.8
71.3
72.8
74.1
75.5
76.7
78.0
80.9
83.5
86.0
88.3
90.5
92.6
94.5
96.4
98.2
100
102
70.0
71.6
73.1
74.5
75.9
77.3
78.5
79.8
82.7
85.4
87.9
90.2
92.4
94.5
96.5
98.4
100.2
102
104
71.8
73.3
74.9
76.3
77.7
79.1
80.3
81.6
84.5
87.2
89.8
92.1
94.3
96.4
98.4
100.3
102.1
104
106
73.5
75.1
76.6
78.1
79.5
80.8
82.1
83.4
86.4
89.1
91.6
94.0
96.3
98.4
100.4
102.3
104.1
106
108
75.2
76.8
78.4
79.9
81.3
82.6
84.0
85.2
88.2
91.0
93.5
95.9
98.2
100.3
102.4
104.3
106.1
108
110
77.0
78.6
80.1
81.6
83.1
84.4
85.8
87.0
90.0
92.8
95.4
97.8
100.1
102.3
104.3
106.3
108.1
110
112
78.7
80.3
81.9
83.4
84.8
86.2
87.6
88.8
91.9
94.7
97.3
99.7
102.0
104.2
106.3
108.2
110.1
112
114
80.4
82.1
83.7
85.2
86.6
88.0
89.4
90.7
93.7
96.5
99.2
101.6
104.0
106.2
108.2
110.2
112.1
114
116
82.2
83.8
85.4
86.9
88.4
89.8
91.2
92.5
95.5
98.4
101.1
103.5
105.9
108.1
110.2
112.2
114.1
116
118
83.9
85.6
87.2
88.7
90.2
91.6
93.0
94.3
97.4
100.3
102.9
105.4
107.8
110.1
112.2
114.2
116.1
118
120
85.6
87.3
88.9
90.5
92.0
93.4
94.8
96.1
99.2
102.1
104.8
107.4
109.7
112.0
114.2
116.2
118.2
120
122
87.3
89.1
90.7
92.2
93.7
95.2
96.6
97.9
101.1
104.0
106.7
109.3
111.7
114.0
116.1
118.2
120.2
122

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