Hello everyone, i am new on this forum. I would like to ask you about climatic design information on ASHRAE 2009 handbook, i look for Izmir/Turkey dry bulb temp is 37C and mean coincident wet bulb temp is 20,9C. When i look at the psychrometric chart with these values the relative humidity is %23,2 and this is too low for Izmir/Turkey. May be i should not take the value of mean coincident wet bulb temp instead of wet bulb temp. Could you help me? Do you have any other documents for climatic design information?

Best regards