Delhi Air Quality & Live Weather Map: Smog, Heat & Dust

Delhi's weather is a tale of seasons that swing between extremes, and for much of the year the headline isn't temperature or rain at all — it's the air. India's capital regularly records some of the worst urban air quality on the planet, particularly in winter, and "Delhi AQI" has become one of the most-watched numbers in the country. But the city's calendar runs through other extremes too: searing pre-monsoon heat, dust storms sweeping off the plains, and the dramatic arrival of the monsoon. Telling these apart — and knowing when each is in play — is exactly what the live map helps with.

Winter: the season of smog

For roughly October through January, Delhi's defining hazard is its air. Several factors converge to create it. As the weather cools, the air grows still, and temperature inversions form — a lid of warmer air aloft that traps cooler, polluted air near the ground and stops it from dispersing. Into that trapped layer pours pollution from many sources at once: vehicle and industrial emissions, seasonal crop-residue burning in neighbouring agricultural states, and festival fireworks.

With little wind to flush it out, the pollution simply accumulates, day after day, until the city sits under a thick grey-brown haze and air-quality readings spike into hazardous ranges. It's a public-health emergency that returns each winter, and it's why so many residents track the air the way other cities track the forecast. This is the same trapping mechanism — stagnant air and an inversion lid holding pollution down — described in the guide on how heat and stagnant air trap pollution.

Spring and the pre-monsoon heat

As winter eases, the air clears and the temperature climbs. By the pre-monsoon months of April through June, Delhi turns punishingly hot. Dry heat builds across the northern plains, pushing temperatures into the mid-40s Celsius during heat waves — conditions that are genuinely dangerous, especially for those working outdoors or without cooling. Hot, dry winds known locally as the loo sweep across the region during this stretch.

This is also the season of dust storms. Ahead of the monsoon, strong winds and the outflow from building thunderstorms can lift dust off the dry plains into walls that sweep across the city, cutting visibility and fouling the air with a different kind of particle than winter's smog.

The monsoon's arrival

Around late June, the monsoon breaks, and the city's weather flips again. The rains bring welcome relief from the heat and wash much of the dust and pollution from the air. But the monsoon carries its own hazards — intense downpours that can overwhelm drainage and flood low-lying parts of the city. The wettest months run through the summer before the cycle turns back toward the clear, then smoggy, days of autumn.

Reading it on the live map

Delhi rewards reading three layers, depending on the season:

• Check the air first. Turn on the Air Quality layer to see current pollution levels — in winter, this is the number that matters most.
• Tell the haze apart. Add Smoke & Dust (aerosol) to distinguish what you're seeing: trapped winter smog, drifting crop-burning smoke, or a pre-monsoon dust storm. They look similar but behave very differently.
• Track the heat. In spring and early summer, Temperature becomes the key layer as the pre-monsoon heat builds toward dangerous levels.
• Watch the stagnation. In winter, calm, cool conditions are the warning sign that air quality is about to deteriorate, as the heat-and-pollution guide explains.

Air quality tells you what you're breathing; the dust and temperature layers tell you why. In a city where the sky's haze can be smog, smoke or dust on any given day, reading them together is the difference between guessing and knowing.