There are different opinions concerning this topic because their effects are somewhat different. But majority agree that tepid water is more effective than cold water.
You can read their effects in detail here:
http://scienceray.com/Biology/ecology/drinking-cold-water-or-warm-water-which-one-is-more-effective/
Tepid water is a mixture of two parts cold water to one part boiling water and is frequently used in breadmaking.
Hot Water Is Hotter Than Tepid Water Because Tepid water is at body temperature, so should not feel either hot or cold when it touches your skin.hot water
Tepid water. Avoid watering plants with cold water.
Lukewarm is slightly warmer than tepid. Tepid typically refers to something that is neither hot nor cold, whereas lukewarm is slightly warm but still not hot.
It is recommended to drink cold water after exercising to help lower your body temperature, reduce inflammation, and rehydrate your body. Cold water can also help cool you down quickly after a strenuous workout.
Tepid water is a mixture of two parts cold water to one part boiling water and is frequently used in breadmaking.
cold
Tepid
(Tepid = moderately warm or lukewarm.)The mother lowered her baby into the tepid bath.OR(Tepid = lack of enthusiasm)The young girl's tepid reaction to meeting her new step-father proved worrisome to her mother.
Hot Water Is Hotter Than Tepid Water Because Tepid water is at body temperature, so should not feel either hot or cold when it touches your skin.hot water
The patient might get shivers with cold water. Tepid spongeing is better.
Tepid water is between hot and cold.
The definition of a tepid sponge bath is just washing up with a wash cloth and a certain temperature of water. It means not getting into the tub or shower at all. Tepid means to use water that is not hot and not cold, mix hot and cold water together with more cold than hot to achieve a tepid temperature.
Tepid means lukewarm, or room temperature not hot but not cold. This is likely talking about a sponge moistened with water at this temperature.
Tepid water. Avoid watering plants with cold water.
Try drinking tepid water - not too hot or too cold. For appropriate diagnosis and treatment, seek the advice of a physician or headache specialist.
Drink cold water