Full formScience
THIstands forTemperature-Humidity Index
Full Form of THI
What is THI?
The Temperature-Humidity Index, commonly abbreviated as THI, is a numerical value that combines air temperature and relative humidity to estimate the level of heat stress experienced by living beings, particularly dairy cattle. It is calculated using a standardized formula that merges ambient temperature in degrees Celsius with humidity percentage to give a single readable score. In India, THI plays a critical role in the dairy sector, which is one of the largest in the world, because high THI values indicate severe heat stress that reduces milk yield, affects animal reproduction, and can even lead to mortality in extreme cases. The index is widely used by veterinarians, dairy farm managers, and agricultural researchers across states like Gujarat, Punjab, Maharashtra, and Tamil Nadu, where dairy farming is a primary livelihood for millions. Meteorologists also refer to THI while issuing heat advisories for both animals and humans during the harsh Indian summer months. Bodies like NDRI and ICAR regularly publish THI-based guidelines to help farmers adopt cooling and shade management strategies. For students, THI is an important topic in agricultural science, veterinary science, and environmental science examinations conducted by ICAR, ASRB, and various state agricultural universities across the country.
THI का फुल फॉर्म
तापमान-आर्द्रता सूचकांक
Example
During the May heatwave in Gujarat, the Temperature-Humidity Index crossed 84, forcing dairy farmers to install fans and sprinklers to protect their cattle from severe heat stress.
THI — frequently asked questions
What is the full form of THI?
THI stands for Temperature-Humidity Index, a measure that combines air temperature and humidity to assess heat stress levels.
Why is THI important in dairy farming in India?
THI helps farmers and veterinarians evaluate heat stress in cattle so they can take preventive measures to protect milk production and animal health during hot weather.
What THI value is considered dangerous for dairy cows?
A THI above 72 indicates mild heat stress, above 80 signals moderate stress, and above 84 indicates severe heat stress requiring immediate cooling action.