Delhi Weather, AQI and Fuel Prices

Why Check Delhi Weather & Data?

Delhi runs India's most concentrated per-capita economy: a gross state domestic product projected at ₹13.27 lakh crore for 2025-26, growing 9.42 percent, with per capita income climbing to ₹5.31 lakh, the third-highest of any Indian state or UT after Sikkim and Goa. Even so, the city's own share of national GDP has slipped from 4 percent in 2015-16 to 3.67 percent in 2024-25, per a CAG report tabled in the Delhi Assembly in August 2026. The economy is almost entirely services: central and state government administration, finance and consulting, the Aerocity-Gurugram IT corridor spilling across the Haryana border, wholesale trade hubs like Chandni Chowk and Karol Bagh, and a real estate and retail sector leaning on 6.46 million average daily Delhi Metro riders in 2025. None of that runs on a predictable calendar. A GRAP-III smog alert can shut construction sites and push half the school system to online classes overnight in November. A June heatwave pushed peak power demand to an all-time high of 8,656 MW on June 19, 2024, straining the grid that powers the offices reporting record IT exports. A January fog bank can strand tens of thousands of passengers at one of the world's busiest single-city airports. This page's live weather, AQI and fuel numbers matter differently depending on who's reading: a Gurugram-bound commuter weighing a smog-heavy commute against working from home, a school administrator checking GRAP-III outdoor-activity rules, a mandi trader in Azadpur watching an unseasonal shower before the evening produce rush.

Delhi's Two Real Risks: Winter Smog and Summer Heat

Delhi's defining risk is the air itself. In November 2023, the capital logged its worst November air quality in seven years: a 30-day average AQI of 376, eleven 'severe' days, and stubble burning contributing 38 to 48 percent of PM2.5 on individual days in early November, prompting the Centre to invoke GRAP Stage III and halt non-essential construction. The smoke arrives from Punjab and Haryana's paddy-stubble burning season (mid-October to late November), then gets trapped by Delhi's own vehicle and industrial emissions under winter's stagnant, cool air. The second risk is heat. IMD's verified all-time high for Delhi is 49.2°C, recorded at Mungeshpur and Narela on May 15-16, 2022; a follow-up reading of 52.9°C at Mungeshpur on May 29, 2024 was later ruled a sensor fault by IMD, though Narela separately logged 49.9°C that same day. The heat turned lethal weeks later: the NGO Centre for Holistic Development recorded 192 deaths among Delhi's homeless population between June 11 and 19, 2024, while Safdarjung Hospital alone reported 13 heat-related deaths and 33 hospitalizations in a single 24-hour window. A third, less chronic risk is monsoon flooding: the Yamuna hit a record 208.66 metres in July 2023, breaching its 1978 high-water mark of 207.49 metres and forcing evacuations from Yamuna Bazar to Rajghat.

How to Use Delhi's Data for Daily Decisions

Commuters crossing the Haryana or UP border for work should check the AQI before choosing between the Metro (6.46 million riders daily) and driving, since GRAP III and IV stages restrict BS-III petrol and BS-IV diesel vehicles from Delhi's roads. Parents and school administrators need the AQI reading each winter morning: GRAP Stage III has repeatedly pushed classes online and banned outdoor sports, and that call is typically made city-wide before school starts. Outdoor workers, delivery riders and construction labourers should treat any May-June forecast above 45°C as a hard stop between noon and 4 pm, the window in which Delhi's 2024 heatwave deaths concentrated most heavily among people with no shelter. Air travelers flying in or out of IGI Airport between late December and mid-January should build in a buffer: on January 4, 2025 alone, dense fog forced 45 flight cancellations, diverted roughly 19 more, delayed or rerouted over 200 flights, and disrupted 81 trains. Farmers and mandi traders in markets like Azadpur watch the pre-monsoon and post-monsoon shoulder weeks most closely, since an unseasonal burst can spoil produce faster than it can be moved.

Delhi's Seasonal Calendar

Delhi's southwest monsoon normally arrives around June 27-30 (IMD long-period normal), several days after it first reaches Kerala, and brings roughly 640 mm of rainfall between June and September (1971-2020 normal). Summer runs April through June, peaking in late May and early June with maximum temperatures regularly crossing 45°C. Winter, December through February, is the smog season's back half, dense fog and temperature inversions keep pollution trapped through January before it eases. The worst AQI weeks, though, land earlier: mid-October through November, exactly when Diwali fireworks overlap with the peak of Punjab and Haryana's paddy-stubble burning, a combination that has pushed Delhi's post-Diwali AQI into 'severe' territory in multiple recent years. Travelers should treat two windows as disruption-prone: early November, when GRAP restrictions can affect construction, schools and truck movement with little notice, and late December into January, when dense fog routinely delays or cancels flights and trains out of IGI Airport and New Delhi Railway Station.

Delhi vs Nearby States: Weather & Data Comparison

Figures from state economic surveys, IMD climatology, CPCB/AQI bulletins and dated news reports; peak-temperature dates differ by state (each state's most recently well-documented reading, not a single shared date), so treat this as a broad reference, not a same-basis dataset.