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Relative Humidity / Dew Point
Relative humidity of the air for temperature t and dew point d. (from Smithsonian Meteorological Tables)
Relative Humidity (%)
Depression of Dew Point t-d
-10°C
0°C
+10°C
+20°C
+30°C
0.0
100
100
100
100
100
0.2
98
99
99
99
99
0.4
97
97
97
98
98
0.6
95
96
96
96
97
0.8
94
94
95
95
96
1.0
92
93
94
94
94
1.2
91
92
92
93
93
1.4
90
90
91
92
92
1.6
88
89
90
91
91
1.8
87
88
89
90
90
2.0
86
87
88
88
89
2.2
84
85
86
87
88
2.4
83
84
85
86
87
2.6
82
83
84
85
86
2.8
80
82
83
84
85
3.0
79
81
82
83
84
3.2
78
80
81
82
83
3.4
77
79
80
81
82
3.6
76
77
79
80
82
3.8
75
76
78
79
81
4.0
73
75
77
78
80
4.2
72
74
76
77
79
4.2
72
74
76
77
79
4.4
71
73
75
77
78
4.6
70
72
74
76
77
4.8
69
71
73
75
76
5.0
68
70
72
74
75
5.2
67
69
71
73
75
5.4
66
68
70
72
74
5.6
65
67
69
71
73
5.8
64
66
69
70
72
6.0
63
66
68
70
71
6.2
62
65
67
69
71
6.4
61
64
66
68
70
6.6
60
63
65
67
69
6.8
60
62
64
66
68
7.0
59
61
63
66
68
7.2
58
60
63
65
67
7.4
57
60
62
64
66
7.6
56
59
61
63
65
7.8
55
58
60
63
65
8.0
54
57
60
62
64
8.2
54
56
59
61
63
8.4
53
56
58
60
63
8.6
52
55
57
60
62
8.8
51
54
57
59
61
9.0
51
53
56
58
61
9.2
50
53
55
58
60
9.4
49
52
55
57
59
9.6
48
51
54
56
59
9.8
48
51
53
56
58
10.0
47
50
53
55
57
10.5
45
48
51
54
11.0
44
47
49
52
11.5
42
45
48
51
12.0
41
44
47
49
12.5
39
42
45
48
13.0
38
41
44
46
13.5
37
40
43
45
14.0
35
38
41
44
14.5
34
37
40
43
15.0
33
36
39
42
15.5
32
35
38
40
16.0
31
34
37
39
16.5
30
33
36
38
17.0
29
32
35
37
17.5
28
31
34
36
18.0
27
30
33
35
18.5
26
29
32
34
19.0
25
28
31
33
19.5
24
27
30
33
20.0
24
26
29
32
21.0
22
25
27
22.0
21
23
26
23.0
19
22
24
24.0
18
21
23
25.0
17
19
22
26.0
16
18
21
27.0
15
17
20
28.0
14
16
19
29.0
13
15
18
30.0
12
14
17
Information from CRC Handbook of Chemistry and Physics, 7first Edition, 1990-1991, David R. Lide
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