In the Western Ghats regions of India, summer comes first

The India Meteorological Department (IMD) designates four climatological seasons:

• Winter season.
• Summer season.
• Southwest monsoon.
• Retreating monsoon.

Summar Season in India: 

• Summer or pre-monsoon season, lasting from March to May.
• In western and southern regions, the hottest month is April and the beginning of May and for northern regions of India, May is the hottest month.
• In May, Temperatures average around 32–40 °C (90–104 °F) in most of the interior.
• The summer season in India can be experienced in April, May, and June.
• June is the hottest month.
• In most parts of India, temperatures recorded are between 30°-32°C.
• The mean daily minimum temperature during the summer months is quite high and rarely goes below 26°C.
• In May, temperatures around 48°C are not uncommon usually in the northern parts of the country.
• The hot weather season in south India is mild and not so intense as found in north India.
• The Peninsular situation of south India with moderating effect of the oceans keeps the temperatures lower than that prevailing in north India.
• The summer months are a period of excessive heat and falling air pressure in the northern half of the country.
• Dust storms in the evening are very common during May in parts of the country.
• These temporary storms bring a welcome respite from the oppressing heat since they bring with them light rains and a pleasant cool breeze.
• Occasionally, the moisture-laden winds are attracted towards the periphery of the low pressure developed in northern India.
• A sudden contact between dry and moist air masses gives rise to local storms of great intensity.
• These local storms are associated with violent winds, torrential rains and even hailstorms.​