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Climate Chart

The following table shows the water vapour content of one cubic metre air, depending on temperature and relative humidity.

  • The upper line shows the water vapour content of one m³
  • The lower line depicts the value of the dew point in °C.
Temp. Relative Humidity
° C 10 % 20 % 30 % 40 % 50 % 60 % 70 % 80 % 90 % 100 %
+ 50° 8,30 g
+ 10°
16,60 g
+ 21°
24,89 g
+ 28°
33,19 g
+ 33°
41,49 g
+ 37°
49,79 g
+ 40°
58,08 g
+ 43°
66,38 g
+ 45°
74,68 g
+ 48°
82,98 g
+ 50°
+ 45° 6,54 g
+ 6°
13,09 g
+ 17°
19,63 g
+ 23°
26,18 g
+ 28°
32,72 g
+ 32°
39,50 g
+ 35°
45,81 g
+ 38°
52,35 g
+ 41°
58,9 g
+ 43°
65,44 g
+ 45°
+ 40° 5,11 g
+ 3°
10,23 g
+ 13°
15,34 g
+ 19°
20,46 g
+ 24°
25,57 g
+ 28°
30,68 g
+ 31°
35,80 g
+ 33°
40,91 g
+ 36°
46,03 g
+ 38°
51,14 g
+ 40°
+ 35° 3,96 g
- 1°
7,92 g
+ 9°
11,88 g
+ 15°
15,84 g
+ 19°
19,80 g
+ 23°
23,76 g
+ 26°
27,72 g
+ 29°
31,68 g
+ 31°
35,64 g
+ 33°
39,50 g
+ 35°
+ 30° 3,04 g
- 4°
6,07 g
+ 5°
9,11 g
+ 11°
12,14 g
+ 15°
15,18 g
+ 19°
18,22 g
+ 21°
21,25 g
+ 24°
24,29 g
+ 26°
27,32 g
+ 28°
30,36 g
+ 30°
+ 25° 2,30 g
- 8°
4,61 g
6,91 g
+ 6°
9,22 g
+ 11°
11,52 g
+ 14°
13,82 g
+ 18°
16,13 g
+ 19°
18,43 g
+ 21°
20,74 g
+ 23°
23,04 g
+ 25°
+ 20° 1,73 g
- 11°
3,46 g
- 3°
5,19 g
+ 2°
6,92 g
+ 6°
8,65 g
+ 9°
10,37 g
+ 12°
12,10 g
+ 14°
13,83 g
+ 16°
15,56 g
+ 18°
17,29 g
+ 20°
+ 15° 1,28 g
- 15°
2,56 g
- 7°
3,85 g
- 2°
5,13 g
+ 1°
6,41 g
+ 5°
7,69 g
+ 7°
8,97 g
+ 9°
10,26 g
+ 10°
11,54 g
+ 12°
12,82 g
+ 15°
+ 10° 0,94 g
- 18°
1,88 g
- 11°
2,82 g
- 6°
3,76 g
- 3°
4,70 g
5,64 g
+ 1°
6,58 g
+ 3°
7,52 g
+ 5°
8,46 g
+ 7°
9,10 g
+ 10°
+ 5° 0,68 g
- 22°
1,36 g
- 14°
2,04 g
- 10°
2,72 g
- 7°
3,40 g
- 4°
4,08 g
- 2°
4,76 g
5,44 g
+ 2°
6,12 g
+ 3°
6,80 g
+ 5°
+ 0° 0,48 g 0,97 g 1,45 g 1,94 g 2,42 g 2,90 g 3,39 g 3,87 g 4,36 g 4,84 g
- 5° 0,34 g
- 29°
0,63 g
- 23°
1,02 g
- 18°
1,36 g
- 15°
1,70 g
- 13°
2,05 g
- 11°
2,39 g
- 9°
2,70 g
- 8°
3,07 g
- 6°
3,41 g
- 5°
- 10° 0,23 g
- 34°
0,47 g
- 27°
0,70 g
- 23°
0,94 g
- 20°
1,17 g
- 18°
1,40 g
- 16°
1,64 g
- 14°
1,87 g
- 12°
2,11 g
- 11°
1,34 g
- 10°
- 15° 0,16 g
- 38°
0,32 g
- 31°
0,48 g
- 27°
0,64 g
- 25°
0,80 g
- 22°
0,97 g
- 20°
1,19 g
- 19°
1,29 g
- 17°
1,45 g
- 16°
1,61 g
- 15°
- 20° 0,09 g
- 42°
0,18 g
- 36°
0,26 g
- 32°
0,35 g
- 29°
0,44 g
- 27°
0,58 g
- 25°
0,62 g
- 24°
0,70 g
- 22°
0,79 g
- 21°
0,88 g
- 20°
- 25° 0,06 g
- 46°
0,11 g
- 40°
0,17 g
- 36°
0,22 g
- 34°
0,28 g
- 32°
0,33 g
- 30°
0,38 g
- 29°
0,44 g
- 27°
0,50 g
- 26°
0,55 g
- 25°

 

Example:

One m³ air holds 39.50g water at 45°C and 60% relative humidity. If the cools off to 35°C (dew point) the relative humidity rises to 100%. This means that the amount of water is the same at 45°C and 60% relative humidity as well as at 35°C and 100% relative humidity.

Should the temperature drop further down to 15°C the air can’t contain the humidity any longer.
Excess water condenses on the goods and the packaging or gets taken up by it.
The maximum relative humidity is still 100%.
Only 12.82g of water can be held.
The rest is taken up by the packaging or the goods:
39.5g – 12.82g = 26.68g water.

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