The report gives the results of a temperature and humidity measurement program in the Dallas area during the summer of 1967. Results are presented in the form of 'horizontal time sections' of temperature and absolute humidity analogous to the commonly used vertical time sections of meteorology. This mode of analysis was found to be very useful in presenting the temporal and spatial variations of temperature and humidity in an urban area. Analyses revealed that areas of densely packed 4- and 5-story buildings are the warmest parts of Dallas during the day, with the area of high-rise buildings somewhat cooler and the residential and open vegetated areas cooler still. This study confirms the presence of the warm area (or 'heat-island') in the center of town at night, a phenomenon observed in many other studies. Absolute humidities in town were strongly affected by the balance between moisture release at the surface and mixing to higher levels.