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Last update: 04:30, 25 Aug 2026
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Lucknow weather is a study in extremes — over 90% of the city's roughly 1,200–1,250 mm annual rainfall falls in a single four-month window, July through October, and just over 100 mm in 24 hours has been enough to send water "up to the neck" through low-lying colonies. A citywide forecast can't tell you which colony floods first — that's what a hyperlocal radar is for.
Lucknow sits flat on the Gangetic plain along the Gomti River, and flat floodplain terrain gives rain nowhere to drain quickly compared with hillier Indian cities. The Gomti's own capacity to carry that water has shrunk over time — concrete embankments, illegal construction and silt buildup have all reduced what used to be natural floodplain absorption, which is why a rain forecast for Lucknow says nothing about whether Daliganj or Aminabad floods next.
RainViewer draws Lucknow's radar data from the India Meteorological Department (IMD), refreshed every 5 minutes. On the live map, that's the difference between a shower dissipating over Gomti Nagar and a cell tracking straight for the Mehndi Ghat riverfront — detail a rain percentage can't give you.
Lucknow's wet season is short and dominant: over 90% of the year's rain falls between July and October, averaging 827.2 mm from the monsoon alone. This is also the window when Gomti riverfront and Kukrail drain flows turn from routine to hazardous, as seen when heavy waterlogging near Mehndi Ghat forced boat commuting on 21 August 2025.
Lucknow's summer builds toward extremes — temperatures reaching 48.9°C — before the monsoon breaks by mid-June, making the sharp transition into rain the city's only major relief window after months of dry heat. Outdoor plans made during this pre-monsoon stretch need to account for how abruptly the switch to heavy rain can happen.
From mid-October through early June, Lucknow returns to dry conditions, including a cold, fog-bound winter that follows the monsoon's withdrawal. Outside the July–October window, the Gomti's flood risk at Daliganj, Nishatganj and Aminabad drops sharply.
Lucknow is India's largest exporter of chikankari, a 400-year-old GI-protected hand-embroidery craft run by about 2,500 entrepreneurs whose outdoor drying process is sensitive to humidity and rain. A radar-confirmed dry window lets producers time outdoor drying instead of risking a batch to an unexpected shower.
Daliganj, Nishatganj, Aminabad, Chowk, Thakurganj, Alambagh, Rajajipuram and Indira Nagar are the low-lying localities that flood worst when the Gomti rises, and Mehndi Ghat required boat commuting after heavy waterlogging on 21 August 2025. Watching a cell's radar track toward the riverfront gives residents time to move before water reaches the street.
Charbagh Railway Station, the Northern Railway division's headquarters and Lucknow's main long-distance rail hub, connects to Chaudhary Charan Singh International Airport via the Metro Red Line through Alambagh — itself a documented flood-risk locality. Checking the radar before that connection shows whether the route is clear.
Lucknow's diversified economy spans aerospace, finance, pharmaceuticals and IT alongside its handicrafts base, and staff moving between office campuses during a July–September downpour benefit from knowing exactly when a cell will clear rather than guessing from a forecast percentage.
Lucknow's historic core, including Bara Imambara and the Chowk market area, sits close to documented flood-risk zones along the Gomti. A live radar check before a walking tour shows whether a monsoon shower is 20 minutes out or already overhead.
RainViewer draws radar data for India from the India Meteorological Department (IMD) via mausam.imd.gov.in, updated every 5 minutes. Coverage is strongest across the Gangetic Plain, western coast, and major cities; sparser in the Himalayan foothills and remote northeast. From Lucknow, India, on the Gangetic Plain itself, the same feed extends to nearby Kanpur and Ayodhya.
A live radar check is the only accurate answer — Lucknow's monsoon rain is concentrated and intense, with just over 100 mm in 24 hours enough to flood low-lying colonies while other parts of the city stay dry. RainViewer's hyperlocal radar, sourced from the India Meteorological Department (IMD) and updated every 5 minutes, shows exactly where rain is falling across Lucknow right now.
Check the radar before you go — Lucknow's monsoon showers can turn a clear afternoon into standing water within an hour, and the Chowk area sits close to documented flood-risk localities along the Gomti. RainViewer's 5-minute updates show whether the rain is passing through or settling in over the Old City.
Rain itself rarely stops the Metro, but Alambagh, a station on the Red Line connecting Charbagh to Chaudhary Charan Singh International Airport, is a documented flood-risk locality during heavy Gomti-driven waterlogging. Checking the radar before that connection shows whether the surrounding roads are clear. RainViewer displays the cell's position over the route in real time.
Yes — Daliganj, Nishatganj, Aminabad, Chowk, Thakurganj, Alambagh, Rajajipuram and Indira Nagar are the worst-hit low-lying localities when the Gomti River rises, and Mehndi Ghat required boat commuting after heavy waterlogging in August 2025. The river's reduced carrying capacity, from concrete embankments and silt buildup, means even moderate rain can back up fast. Avoid these areas during a radar-confirmed heavy cell.
Mid-October through early June is Lucknow's dry season, though it includes a pre-monsoon heat peak from late March to early June with temperatures reaching close to 49°C. The wettest window, July through October, carries over 90% of the year's rain and the highest flood risk along the Gomti. Visitors preferring milder, drier conditions should target November through February.
Lucknow sits flat on the Gangetic plain along the Gomti River, so unlike hillier cities, rain has nowhere to drain quickly once it falls — and the Gomti's own natural drains, originally built to carry surplus water, now mostly carry sewage and have lost much of their capacity. That means the same rainfall total can flood one colony and barely touch a neighborhood a few streets over, depending on drain condition rather than rainfall alone. A live radar view of where the heaviest cells are tracking is the only way to see that difference in time.
Yes — RainViewer's hyperlocal radar for Lucknow draws data from the India Meteorological Department (IMD) via mausam.imd.gov.in and refreshes every 5 minutes. It shows a cell building over Gomti Nagar before it reaches the riverfront colonies, rather than a static forecast icon. Coverage extends across the Gangetic Plain to Kanpur and Ayodhya on the same feed.
Yes — RainViewer's rain alert notifies you when a storm cell is a set distance from a saved location, such as a workshop in the chikankari district or a home in Daliganj near the Gomti. Setting an alert there gives embroidery producers time to move outdoor drying work indoors before rain arrives. The same alert works for any saved Lucknow location, including Charbagh Railway Station.
Lucknow's chikankari embroidery producers need to know the exact minute a cell will reach their outdoor drying racks, not just that rain is "expected" today.
Lucknow's flat Gangetic-plain terrain gives rain nowhere to drain, so a cell over Gomti Nagar can flood Daliganj before a citywide forecast even updates.
Your weather app says moderate rain in Lucknow today. RainViewer's live hyperlocal radar shows it's already flooding Daliganj street by street while Gomti Nagar stays dry — that's the call Lucknow's riverfront residents make every monsoon before the water reaches their door.
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See the Gomti riverfront 2 hours ahead in 5-minute steps, enough lead time to move drying chikankari fabric indoors.
Set an alert for a home in Daliganj or a workshop near Aminabad and get notified before the cell reaches the river.
Direction arrows show monsoon cells building from the southeast during the July–October wet season.
Review the last 48 hours to see how the August 2025 Mehndi Ghat waterlogging built up, cell by cell.
Track Daliganj, Aminabad and Alambagh at once, all on independent alerts.