Is it raining now in North Dumdum?
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Last update: 03:30, 24 Aug 2026
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Rain in North Dumdum: What You Need to Know
North Dumdum gets nearly a fifth of its annual rain in July alone, with the monsoon delivering roughly 351 mm in that single month against a yearly total near 1,650 mm. Anyone checking North Dumdum weather during the June–September season needs more than a daily average — a North Dumdum rain radar shows the difference between a passing shower over Nimta and a downpour stalling over the airport. RainViewer's hyperlocal radar tracks that difference in real time, because tropical Bay of Bengal systems here can drop most of a week's rain in a single afternoon.
The mechanism that breaks a simple forecast here is tidal backflow. The Bagjola canal, which drains Birati and Nimta before reaching the Bidyadhari River, doesn't just fill with rain — its water level also rises and falls with the tide, so the same rainfall total can leave one stretch of canal clear and another backed up depending on the hour. Add that roughly 75% of Netaji Subhas Chandra Bose International Airport sits inside North Dumdum Municipality on reclaimed marshland, and a single city-wide rainfall average tells you almost nothing about whether the runway apron or the Belghoria Expressway is waterlogged at a given moment.
RainViewer pulls its radar data for North Dumdum from the India Meteorological Department (IMD), refreshed every 5 minutes, so the map reflects what's falling over Dum Dum, Birati and the airport right now rather than what a model expected six hours ago. A forecast can tell you it will rain sometime today; the live map can tell you the cell over the Bagjola canal is 10 minutes from the M.B. Road junction.
Rain by Season in North Dumdum
Monsoon season (June–September)
The SW monsoon's Bay of Bengal branch drives the bulk of North Dumdum's rain in this window, peaking in July at around 351 mm. This is the period when tidal backflow through the Bagjola canal turns routine downpours into standing water around Birati and Nimta, and when flight operations at Netaji Subhas Chandra Bose International Airport are most exposed to sudden, heavy cells — making June–September the most operationally disruptive stretch of the year for both airport traffic and canal-side neighborhoods.
Transition months (May & October)
As the monsoon builds in May and retreats in October, rainfall becomes patchy rather than the steady June–September pattern, and the Bagjola canal's tidal component makes local flooding harder to predict, since a light shower combined with a high tide can still back up water around Nimta even when the citywide total looks minor. These shoulder weeks catch residents off guard precisely because the wet-season habit of watching the sky hasn't kicked in yet.
Winter dry season (November–February)
Rainfall drops sharply across the North Dumdum–Kolkata metro area during these months, canal levels stay low regardless of the tide, and the Bagjola waterlogging risk that dominates the monsoon effectively disappears. Locals and airport ground crews shift attention away from drainage and flight-delay risk during this stretch, though the area's low-lying geography means the risk returns quickly once the rains resume.
Why You Need a Rain Radar in North Dumdum
Airport travellers at Netaji Subhas Chandra Bose International Airport
With 75% of the airport's land inside North Dumdum Municipality, a cell tracked on radar 20-30 minutes before it reaches the runway apron gives ground staff and passengers time to expect a delay before it's announced. Travellers heading to CCU can check the live map before leaving home instead of guessing from a generic forecast.
Ordnance Factory Dum Dum shift workers
The defence manufacturing plant's precision-machining lines depend on staff arriving on schedule, and a radar check before a shift change shows whether a cell is about to cross the factory's access roads. Knowing 20 minutes ahead lets a supervisor stagger arrivals rather than have workers caught in a sudden downpour.
Commuters on the Belghoria Expressway and M.B. Road
These are the key routes linking the airport to the city core, and both are exposed to monsoon waterlogging. A driver watching the radar can choose the Kalyani Expressway via M.B. Road, or wait 20 minutes for a cell to clear before joining Jessore Road traffic.
Birati and Nimta residents near the Bagjola canal
Tidal backflow means these localities can flood even from moderate rain, a risk NKDA is addressing by raising the canal embankment. Knowing a cell is building over the canal 30 minutes out lets residents move vehicles or shop stock before water rises with the tide.
Visitors and airport transit passengers
Someone connecting through CCU can check whether the terminal-to-taxi walk will be dry, given the airport sits on reclaimed marshland exposed to sudden downpours. A quick radar check before disembarking beats stepping into an unexpected cell.
RainViewer Radar Coverage in North Dumdum
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. On the map, North Dumdum sits inside the wider Kolkata metro core, next to Dum Dum, Birati, Nimta, and Barasat — all visible on the same radar view.
North Dumdum Rain Radar: Frequently Asked Questions
- Is it raining in North Dumdum right now?
Only a live radar check answers this accurately, because North Dumdum's rain shifts minute to minute between Dum Dum, Birati and the airport rather than falling evenly across the municipality. RainViewer's hyperlocal radar pulls IMD data updated every 5 minutes, so you can see exactly which pocket of the city is wet right now. Check the map before stepping outside rather than relying on a single citywide forecast number.
- Should I check the radar before heading to Netaji Subhas Chandra Bose International Airport?
Yes, checking the radar before leaving for the airport is worth it, because roughly 75% of the airport's land lies inside North Dumdum and heavy cells here directly disrupt flight operations. A 20-minute radar check shows whether a downpour is building over the runway apron before you leave home. This applies whether you're departing or picking someone up along the Belghoria Expressway.
- When is the best time to drive the Belghoria Expressway during monsoon season?
The safest window is whenever the live radar shows no active cell over the M.B. Road and Jessore Road stretch, since this route floods fastest during heavy June–September downpours. Waiting 20-30 minutes for a passing cell to clear is often faster than sitting in waterlogged traffic. The Kalyani Expressway via M.B. Road carries the same monsoon exposure, so check both before setting out.
- Does North Dumdum flood during monsoon rain?
Yes, North Dumdum floods regularly during the June–September monsoon, driven mainly by the Bagjola canal backing up under combined rainfall and tidal pressure from the Bidyadhari River. Birati and Nimta are the localities most exposed, and NKDA is raising the canal embankment to reduce the risk. Hydrodynamic modelling shows full dredging of the canal could cut flood levels by up to 1.2 metres.
- When is the best time to visit North Dumdum to avoid heavy rain?
Winter, roughly November through February, is the driest and most predictable stretch, avoiding the July peak of the June–September monsoon when North Dumdum sees around 351 mm in a single month. Airport flight operations near Netaji Subhas Chandra Bose International Airport also run more smoothly outside the monsoon window. If you must travel during monsoon, plan around the radar rather than the calendar.
- Why does it seem to rain more in some parts of North Dumdum than others?
Rain totals genuinely differ block to block here because the Bagjola canal's water level rises and falls with the tide from the Bidyadhari River, not just with rainfall. That means two neighborhoods can get the same shower and end up with very different flooding, depending on the tide at the moment it fell. This tidal layer is why a single citywide rainfall figure understates the real risk in Birati and Nimta.
- Does RainViewer have a live rain radar for North Dumdum?
Yes, RainViewer shows a hyperlocal radar for North Dumdum built from India Meteorological Department (IMD) data, refreshed every 5 minutes. The map covers the full municipality, including the airport, Dum Dum, Birati and Nimta, in one view. It is free to use on both iOS and Android.
- Can I set a rain alert for a specific spot in North Dumdum?
Yes, RainViewer lets you drop a pin and set a rain alert for any location, such as the M.B. Road junction near the Bagjola canal. You'll get a notification before rain reaches that exact spot rather than a generic city-level warning. This is useful for timing a departure from an Ordnance Factory Dum Dum shift or a drive along the Belghoria Expressway.
Track Rain in North Dumdum in Real Time
Every monsoon season, drivers on the Belghoria Expressway and travellers heading to Netaji Subhas Chandra Bose International Airport lose time to rain they didn't see coming.
North Dumdum's flooding depends on when the tide from the Bidyadhari River meets rainfall in the Bagjola canal, a timing detail no daily forecast tracks.
Your weather app said clear skies today. RainViewer shows it's already raining over Birati while Nimta, just down the road, is still dry — that's live, hyperlocal radar at street level.
Track rain in North Dumdum — free Upgrade to Essential for alerts, forecasts, and full radar history
2-hour forecast in 5-minute slices
RainViewer breaks the next two hours into 5-minute slices, so you can see whether a cell over the Bagjola canal clears before your shift at Ordnance Factory Dum Dum ends.
Rain alerts before arrival
Set an alert for Netaji Subhas Chandra Bose International Airport and get notified before a cell reaches the runway apron, not after your flight is already delayed.
Direction arrows on the map
Direction arrows show whether a cell moving in from the Bay of Bengal to the southeast is heading toward Birati or curving away from Nimta.
48 hours of radar history
Scroll back 48 hours to see exactly how the Bagjola canal's water level tracked the last tidal cycle and rainfall combination.
Multiple locations
Track North Dumdum, the airport, and the Belghoria Expressway as three separate saved locations, so you always know which one is about to get wet.
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