Just a little bit above cold, somewhere around body heat.
Body heat is 98.6°F or 37.0°C.
So lukewarm would fall roughly somewhere between 79 - 97 °F or 26 - 36°C.
Lukewarm temperature for yeast is typically around 100-110F (37-43C).
The temperature of water that is considered lukewarm is typically around 98-105 degrees Fahrenheit.
Water is lukewarm when it is slightly above your temperature, about 100-105 degrees F.
The degree for lukewarm temperature can vary, but it is typically around 90-98 degrees Fahrenheit (32-37 degrees Celsius). Lukewarm generally refers to a moderate or slightly warm temperature that is neither hot nor cold.
Perhaps about 75 or 80 degrees Lukewarm is generally around body heat. ≈ 36 oC or 98 oF
You can adjust the temperature of lukewarm water from the cold tap by mixing it with hot water until it reaches the desired warmth.
"Lukewarm" is a non-specific term, but if we consider room temperature to be 70 degrees, and bath water temperature to be 110 degrees, that is a 40 degree difference. Lukewarm should be about halfway between those two points. That would be 90 degrees, or about the same temperature as the average human's skin. So water on the skin at that temperature would feel "just a little bit warm". Which is what lukewarm means.
Body temperature is about 98oF or 36oC, so 71oF would not be too good a temperature for lukewarm water, it would be too cool but 71 ºC would be way to warm.
Lukewarm” generally means between 98 and 105 degrees Fahrenheit, 36.5 to 40.5 Celsius. When you run the water on your wrist and it feels warmer than your body temperature, but not hot, that should be just about right.
Hot water is warmer than tepid water. Tepid water typically refers to water that is lukewarm or slightly warm, while hot water is heated to a higher temperature.
The word lukewarm can either refer informally to a range of temperatures (e.g. only moderately warm or tepid, when something should be hot) or to refer to a person's lack of enthusiasm in some area. It tends to have a negative connotation.
A hot cup of coffee will cool down at a certain rate, but as the coffee cools, the rate at which it cools slows down. This is why a "lukewarm" cup of coffee cools down so slowly. Even though the warm cup of coffee is cooling down quicker at first, the lukewarm cup essentially has a "head start" on the way to room temperature.