India, June 30 -- Delhi on Tuesday recorded a 'real feel' temperature of 53degC.

The day's high on the thermometer was 37degC.

The difference between the two captures the discomfort that comes with high humidity levels, a phenomenon that isn't common for much of north India.

Meteorologists say this mugginess is the result of southwesterly winds off the Arabian Sea feeding moisture into northwestern India, even as the monsoon, delayed past its normal Delhi onset of June 27, is yet to arrive.

Until it reaches, the combination of humidity and heat may only be broken by scattered, short-lived relief from thunderstorms in the region.

'Real feel' temperature or heat index (HI) is the estimate of how hot the temperature feels to a person. T...