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Date STUDENT RESOURCE PAGE 2.3 INFORMATION SHEET

Relative Humidity Table To determine relative humidity:

1 Subtract the wet-bulb temperature from the dry-bulb temperature.

2 Find this number—the difference in degrees—at the top of the chart and place your finger on it.

3 Find the dry-bulb temperature in the first column on the left. Place your finger on it.

4 Bring your fingers down the column and across the row. The relative humidity percentage appears where column and row intersect on the chart.

Copyright © Houghton Mifflin Company. All Rights Reserved.

Dry Bulb (ºC)

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

Number of degrees difference between the wet- and dry-bulb readings (ºC)

1 88% 89 89 89 90 90 90 91 91 91 91 91 92 92 92 92 92 93 93 93 93 93 93 93 93

2 77 78 79 79 80 80 81 82 82 82 83 83 84 84 84 85 85 85 86 86 86 86 87 87 87

3 66 67 68 69 70 71 72 73 73 74 75 75 76 77 77 77 78 78 79 79 80 80 80 81 81

4 56 57 59 60 61 62 63 64 65 66 67 68 69 69 70 71 71 72 72 73 73 74 74 75 75

5 45 47 49 51 52 54 55 56 57 58 59 60 61 62 63 64 65 65 66 67 67 68 68 69 69

6 35 38 40 42 43 45 47 48 50 51 52 53 54 56 57 57 58 59 60 61 61 62 63 63 64

7 26 28 31 33 35 37 39 41 42 44 45 47 48 49 50 51 52 53 54 55 56 57 57 58 59

8 16 19 22 25 27 29 31 33 35 37 38 40 41 43 44 45 46 47 49 50 50 51 52 53 54

9 7 11 14 16 19 22 24 26 28 30 32 34 35 37 38 40 41 42 43 44 45 46 47 48 49

10 -2 5 9 11 14 17 19 21 24 26 27 29 31 32 34 35 37 38 39 40 41 42 43 44

WEATHER AND WATER • SECTION 2 HUMIDITY, DEW, AND FROST


humidity chart