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Computation formula: Spell out units when not preceded by a number
[td]<math display=block>\text{Humidex} = {T}_\text{air} + 0.5555(e - 10.0)</math>[/td] [td][/td]
[td][/td] [td]where <math>e</math> is the vapour pressure in mbar given by:[/td]
[td]where <math>e</math> is the vapour pressure in millibars given by:[/td] [td][/td]
[td][/td] [td]<math display=block>e = 6.11 \times 2.71828^{5417.7530 [( 1/273.15) - (1/{T}_\text{dewpoint} )]}</math>[/td]
[td]<math display=block>e = 6.11 \times 2.71828^{5417.7530 [( 1/273.15) - (1/{T}_\text{dewpoint} )]}</math>[/td] [td][/td]
[td][/td] [td]also note:[/td]
[td]also note:[/td] [td]* <math>{T}_\text{air}</math> is the air temperature in <math>^\circ\text{C}</math>[/td]
[td]* <math>{T}_\text{air}</math> is the air temperature in degrees Celsius[/td] [td]* <math>{T}_\text{dewpoint}</math> is the dewpoint in kelvins, which can be calculated from dewpoint in <math>^\circ\text{C}</math> using <math>(\{T\}_{^\circ\text{C}} + 273.15)</math>[/td]
[td]* <math>{T}_\text{dewpoint}</math> is the dewpoint in kelvins, which can be calculated from dewpoint in degrees Celsius using <math>(\{T\}_\text{K} = \{T\}_{^\circ\text{C}} + 273.15)</math>[/td] [td]5417.7530 is a rounded constant based on the molecular weight of water, [[Enthalpy of vaporization|latent heat of evaporation]], and the [[universal gas constant]]. The humidity adjustment approximately amounts to one Fahrenheit degree for every millibar by which the [[Vapour pressure of water|partial pressure of water]] in the atmosphere exceeds {{convert|10|mb}}.[/td]
[td]5417.7530 is a rounded constant based on the molecular weight of water, [[Enthalpy of vaporization|latent heat of evaporation]], and the [[universal gas constant]]. The humidity adjustment approximately amounts to one Fahrenheit degree for every millibar by which the [[Vapour pressure of water|partial pressure of water]] in the atmosphere exceeds {{convert|10|mb}}.[/td] [td][/td]
[td][/td]
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β Previous revision
[/td][td]
[td]<math display=block>\text{Humidex} = {T}_\text{air} + 0.5555(e - 10.0)</math>[/td]Revision as of 23:11, 1 September 2025
[/td][td]<math display=block>\text{Humidex} = {T}_\text{air} + 0.5555(e - 10.0)</math>[/td] [td][/td]
[td][/td] [td]where <math>e</math> is the vapour pressure in mbar given by:[/td]
[td]where <math>e</math> is the vapour pressure in millibars given by:[/td] [td][/td]
[td][/td] [td]<math display=block>e = 6.11 \times 2.71828^{5417.7530 [( 1/273.15) - (1/{T}_\text{dewpoint} )]}</math>[/td]
[td]<math display=block>e = 6.11 \times 2.71828^{5417.7530 [( 1/273.15) - (1/{T}_\text{dewpoint} )]}</math>[/td] [td][/td]
[td][/td] [td]also note:[/td]
[td]also note:[/td] [td]* <math>{T}_\text{air}</math> is the air temperature in <math>^\circ\text{C}</math>[/td]
[td]* <math>{T}_\text{air}</math> is the air temperature in degrees Celsius[/td] [td]* <math>{T}_\text{dewpoint}</math> is the dewpoint in kelvins, which can be calculated from dewpoint in <math>^\circ\text{C}</math> using <math>(\{T\}_{^\circ\text{C}} + 273.15)</math>[/td]
[td]* <math>{T}_\text{dewpoint}</math> is the dewpoint in kelvins, which can be calculated from dewpoint in degrees Celsius using <math>(\{T\}_\text{K} = \{T\}_{^\circ\text{C}} + 273.15)</math>[/td] [td]5417.7530 is a rounded constant based on the molecular weight of water, [[Enthalpy of vaporization|latent heat of evaporation]], and the [[universal gas constant]]. The humidity adjustment approximately amounts to one Fahrenheit degree for every millibar by which the [[Vapour pressure of water|partial pressure of water]] in the atmosphere exceeds {{convert|10|mb}}.[/td]
[td]5417.7530 is a rounded constant based on the molecular weight of water, [[Enthalpy of vaporization|latent heat of evaporation]], and the [[universal gas constant]]. The humidity adjustment approximately amounts to one Fahrenheit degree for every millibar by which the [[Vapour pressure of water|partial pressure of water]] in the atmosphere exceeds {{convert|10|mb}}.[/td] [td][/td]
[td][/td]
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