TABLE 36 Dew Point Dew Point Difference between dry-bulb and wet-bulb temperatures 1° 2° 3° 4° 5° 6° 7° 8° 9° 10° 11° 12° 13° 14° ° ° ° ° ° ° ° ° ° ° ° ° ° ° –52 45 39 34 –29 25 22 18 15 –12 –1 +2 10 12 +15 17 20 22 24 +27 29 32 34 36 +38 40 42 44 46 +48 50 52 54 56 +58 60 62 64 67 +69 71 73 75 77 +79 81 83 85 87 +89 91 93 95 97 +99 –75 50 39 32 –26 21 16 12 –5 –2 +1 +10 13 16 18 21 +24 26 29 31 33 +35 38 40 42 44 +46 48 50 53 55 +57 59 61 63 65 +67 69 71 73 75 +77 79 81 83 85 +87 89 92 94 96 +98 –49 35 27 20 –15 10 –2 +1 +5 11 14 17 +20 23 26 28 31 +33 35 37 40 42 +44 46 49 51 53 +55 57 59 61 63 +66 68 70 72 74 +76 78 80 82 84 +86 88 90 92 94 +96 –50 –34 24 17 11 –2 +2 10 13 +16 19 22 25 28 +30 33 35 37 40 +42 44 47 49 51 +53 55 57 60 62 +64 66 68 70 72 +74 77 79 81 83 +85 87 89 91 93 +95 +4 +11 15 18 22 25 +27 30 32 35 37 +40 42 44 47 49 +51 54 56 58 60 +62 64 67 69 71 +73 75 77 79 81 +84 86 88 90 92 +94 –4 +1 +6 10 14 18 21 +24 27 29 32 35 +37 40 42 45 47 +49 52 54 56 58 +61 63 65 67 69 +72 74 76 78 80 +82 84 86 88 91 +93 –8 –1 +4 13 17 +20 23 26 29 32 +35 37 40 42 45 +47 50 52 54 57 +59 61 63 66 68 +70 72 74 76 79 +81 83 85 87 89 +91 –22 –12 –4 +2 12 +16 19 23 26 29 +32 35 37 40 43 +45 48 50 52 55 +57 59 62 64 66 +68 71 73 75 77 +79 82 84 86 88 +90 –31 16 –7 +6 +11 15 19 22 26 +29 32 35 37 40 +43 45 48 50 53 +55 58 60 62 65 +67 69 71 74 76 +78 80 82 84 87 +89 –47 22 11 –2 +4 10 14 18 22 +25 29 32 35 38 +40 43 46 48 51 +53 56 58 61 63 +65 67 70 72 74 +76 79 81 83 85 +87 –30 14 –4 +3 13 18 +21 25 28 32 35 +38 41 43 46 49 +51 54 56 59 61 +64 66 68 70 73 +75 77 79 82 84 +86 –42 –18 –7 +2 13 +17 21 25 28 32 +35 38 41 44 46 +49 52 54 57 59 +62 64 67 69 71 +73 76 78 80 82 +85 –79 23 –9 +6 +12 17 21 25 28 +32 35 38 41 44 +47 50 52 55 57 +60 62 65 67 70 +72 74 76 79 81 +83 –29 11 –2 +5 11 16 21 25 +28 32 35 39 42 +45 47 50 53 55 +58 61 63 66 68 +70 73 75 77 80 +82 Dry-bulb temp F ° –20 18 16 14 12 –10 –2 +2 +10 12 14 16 18 +20 22 24 26 28 +30 32 34 36 38 +40 42 44 46 48 +50 52 54 56 58 +60 62 64 66 68 +70 72 74 76 78 +80 82 84 86 88 +90 92 94 96 98 +100 Difference between dry-bulb and wet-bulb temperatures Dry-bulb temp F ° 15° 16° 17° 18° 19° 20° 21° 22° 23° 24° 25° 26° ° ° ° ° ° ° ° ° ° ° ° ° +46 48 +50 52 54 56 58 +60 62 64 66 68 +70 72 74 76 78 +80 82 84 86 88 +90 92 94 96 98 +100 –36 14 –3 +4 10 16 20 +25 29 32 36 39 +42 45 48 51 53 +56 59 61 64 66 +69 71 73 76 78 +80 –45 –17 –5 +3 10 16 +20 25 29 33 36 +39 43 46 48 51 +54 57 59 62 64 +67 69 72 74 77 +79 –78 21 –7 +2 10 +15 20 25 29 33 +36 40 43 46 49 +52 55 57 60 63 +65 68 70 73 75 +77 –25 –8 +2 +9 15 20 25 29 +33 37 40 44 47 +50 53 55 58 61 +63 66 68 71 73 +76 –29 –10 +1 15 21 25 +30 34 37 41 44 +47 50 53 56 59 +62 64 67 69 72 +74 –34 –11 +1 15 21 +26 30 34 38 41 +45 48 51 54 57 +60 62 65 67 70 +73 –39 –12 +9 16 +21 26 31 35 38 +42 45 49 52 55 +58 60 63 66 68 +71 –45 –13 +9 +16 22 27 31 35 +39 43 46 49 52 +55 58 61 64 67 +69 –52 –14 +9 16 22 27 32 +36 40 43 47 50 +53 56 59 62 65 +67 –59 –14 +10 17 23 28 +32 37 41 44 48 +51 54 57 60 63 +66 –68 –14 +1 10 17 23 +28 33 37 41 45 +48 52 55 58 61 +64 –76 –14 +1 11 18 +24 29 34 38 42 +46 49 52 56 59 +62 ° Dry-bulb temp F ° –77 –13 +2 11 +19 25 30 35 39 +43 47 50 53 57 +60 –70 –12 +3 +12 20 26 31 36 +40 44 47 51 54 +57 +46 48 +50 52 54 56 58 +60 62 64 66 68 +70 72 74 76 78 +80 82 84 86 88 +90 92 94 96 98 +100 Dry-bulb temp F 42° 27° 28° ° Difference between dry-bulb and wet-bulb temperatures Dry-bulb temp F 29° 30° 31° 32° 33° 34° 35° 36° 37° 38° 39° 40° 41° ° ° ° ° ° ° ° ° ° ° ° ° ° ° +76 78 +80 82 84 86 88 +90 92 94 96 98 +100 –61 –11 +4 13 20 27 32 +36 41 45 48 52 +55 –53 –10 +5 14 21 27 +33 37 42 46 49 +53 –45 –8 +6 15 22 +28 34 38 43 47 +50 –39 –6 +7 16 +24 30 35 39 44 +47 –33 –4 +9 +18 25 31 36 40 +45 –28 –2 +10 19 26 32 37 +41 –23 +12 20 27 33 +38 ° –18 +2 –14 13 +4 –10 22 15 +6 –7 –43 28 23 17 +9 –4 –30 +34 +30 +25 +19 +11 –21 ° +76 78 +80 82 84 86 88 +90 92 94 96 98 +100 715 Dry-bulb temp F ° –20 18 16 14 12 –10 –2 +2 +10 12 14 16 18 +20 22 24 26 28 +30 32 34 36 38 +40 42 44 46 48 +50 52 54 56 58 +60 62 64 66 68 +70 72 74 76 78 +80 82 84 86 88 +90 92 94 96 98 +100 TABLE 36