 Here's a picture of a material or cumulus cloud in the ocean. We can see the cloud base here, the vertical growth, and the cloud top here. Above and below the cloud is clear air. We can imagine what temperature and dew point a radius on would record if we were to launch one from below the cloud. Initially, we would see a temperature decrease, probably close to the dry-80 back lapse rate of 10 degrees C per kilometer. We would see the dew point decrease slightly relative to the temperature, which is skewed to 45 degrees on the skew-t diagram. At cloud base, temperature and dew point are about the same. Inside the cloud, the temperature and dew point stay together along the moist adiabat, which is a temperature decrease of about 6 degrees C per kilometer. Remember that the relative humidity is about 100% in the clouds. The air above the cloud is likely staple, which is why the clouds height is limited. Staple air has a lapse rate that is less than the adiabatic, dry adiabatic lapse rate. In addition, the dew point likely drops off because the middle to upper troposphere tends to be drier than the lower troposphere. When you look at an upper earth sounding, you can often pick out where the clouds are by looking at where the temperature and dew point get close together.