The north-western parts of India, like Haryana, Punjab, Rajasthan, UP., Delhi, experience diurnal temperature. Here the temperature goes up to 48 Celsius. This happens because thelow pressure conditions intensify the north-western parts during May-June. Also, the south-west monsoon enters in peninsular India, which increases humidity in its north-western parts.Hot, dry winds namely Loo, starts blowing and dust storms spurt as south-westerly winds blow violently to compensate the low pressure condition formed in north-western parts of the country.

The north-western India is surrounded by the desert. The desert sand becomes hot during the day and quickly cools down in the night which affects the daytime temperature of the neighboring regions.