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Last update: 04:30, 25 Aug 2026
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Rain in Darbhanga: What You Need to Know
Darbhanga weather sits inside one of India's most flood-exposed river systems: 87% of the district's land is classified flood-prone, and the June–September monsoon delivers over 80% of Bihar's annual rainfall. A live rain radar for Darbhanga matters because a hyperlocal radar can show a Kamala-Balan surge building well before the river itself rises.
Darbhanga sits amid six flood-prone rivers — the Kosi, Gandak, Burhi Gandak, Bagmati, Kamala-Balan and Adhwara — whose catchments are roughly 65% upstream in Nepal and Tibet. High sediment load from these Nepal-origin rivers raises their beds above the surrounding plains, so overbank flooding here often has little to do with how hard it's raining locally. A single Bihar-wide forecast cannot show that a Kamala-Balan surge is building upstream while Darbhanga's own sky stays clear.
RainViewer draws its Darbhanga feed from the India Meteorological Department (IMD), refreshed every 5 minutes, so the live map reflects new radar scans as they arrive rather than a forecast written hours earlier. Darbhanga sits close enough to Madhubani and Samastipur that rain moving across the wider Mithila region is visible on the same sweep before local rivers respond. What the live radar reveals and a forecast cannot: whether a cell over the Kamala-Balan catchment is the kind that put Kusheshwarsthan residents on embankments in 2017.
Rain by Season in Darbhanga
Monsoon and flood season (June–September)
The southwest monsoon drives over 80% of Bihar's annual rainfall, and Darbhanga's 2017 flood — driven by the Kamala-Balan river — ran from August 10 to September 20. This is the window when the district's 87% flood-prone land area turns from a statistic into a lived risk.
Pre-monsoon litchi harvest (May–June)
The Shahi litchi harvest, a defining Mithila-region crop cycle, runs just ahead of the monsoon in May and June and is now air-freighted through Darbhanga Airport with 108% year-on-year growth in cargo volume. Clear skies in this short window matter directly to how much fruit reaches market before the rains complicate transport.
Dry season (October–May)
October through May is Darbhanga's dry season, giving the district's mango, fish, grain, oilseed and sugarcane trade its steadiest stretch. Flood-prone villages like Raghunathpur, Laxminiya and Bagharas see their only real reprieve from river risk during these months.
Why You Need a Rain Radar in Darbhanga
Kusheshwarsthan block residents near the Kamala-Balan
Kusheshwarsthan block is repeatedly named in flood reporting, with residents forced onto embankments during Kamala-Balan floods, and Raghunathpur, Laxminiya and Bagharas villages were identified as most vulnerable during the 2017 event. Watching the radar for rain building in the Kamala-Balan catchment gives more lead time than waiting for river levels to rise locally.
Shahi litchi exporters at Darbhanga Airport
Litchi air-cargo through Darbhanga Airport grew 108% year-on-year, moving 250 tonnes of the short-window Shahi harvest before the monsoon complicates transport. Exporters checking the radar in May and June can time loading around a clear window rather than losing fruit to a delayed shipment.
Darbhanga Airport passengers
Darbhanga Airport handled over 510,000 passengers in FY2024-25, the second-busiest in Bihar after Patna, much of it during a monsoon season that brings over 80% of the state's annual rain. Travelers checking the radar before heading to the airport can judge whether monsoon weather is likely to affect their trip in from Madhubani or Samastipur.
Traders in Darbhanga, Madhubani and Samastipur
Small textile, jewellery and agri-input traders across these three districts rely on Darbhanga Airport for fast intercity transport of goods including mangoes, fish, grains and sugarcane. A trader checking the radar before a delivery run can route around an active Kamala-Balan-area cell instead of losing time to a flooded approach road.
Farmers on the Kosi-Bagmati floodplain
The district's mango, grain and oilseed trade sits directly in the path of the Kosi, Bagmati and Kamala-Balan flood system, where sediment-raised riverbeds mean overbank flooding can happen independent of local rain intensity. Checking the radar for upstream rain, not just local skies, is the more useful habit here.
RainViewer Radar Coverage in Darbhanga
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. Darbhanga sits close enough to Madhubani and Samastipur within the wider Mithila region that rain systems crossing North Bihar are visible on the same radar sweep before local rivers respond.
Darbhanga Rain Radar: Frequently Asked Questions
- Is it raining in Darbhanga right now?
The fastest way to know is a live hyperlocal radar, since Darbhanga's river system means flood risk can build even when the local sky looks clear. RainViewer pulls fresh India Meteorological Department (IMD) radar scans every 5 minutes, so the map reflects what is happening right now rather than a forecast written hours earlier.
- Is monsoon season a good time to fly the Shahi litchi harvest out of Darbhanga?
The Shahi litchi harvest runs May to June, just ahead of the monsoon, and exporters have grown air-cargo volume 108% year-on-year moving fruit through Darbhanga Airport in that window. Checking the radar before a loading run shows whether the clear pre-monsoon stretch is holding or a system is arriving early.
- Does rain affect travel to Darbhanga Airport?
Darbhanga Airport handles over 510,000 passengers a year, many traveling through a monsoon season that delivers over 80% of Bihar's annual rainfall. Checking the radar before heading to the airport from Madhubani or Samastipur shows whether an approach road is likely to see standing water.
- Does Darbhanga flood when it rains?
Yes — 87% of Darbhanga's land area is classified flood-prone, and the Kamala-Balan river has repeatedly flooded Kusheshwarsthan block, forcing residents in Raghunathpur, Laxminiya and Bagharas onto embankments during the 2017 event. Much of that risk comes from upstream Himalayan rainfall reaching the Kosi, Gandak and Bagmati rivers rather than local rain alone.
- When is the best time to visit Darbhanga to avoid heavy rain?
October through May is Darbhanga's dry season, well clear of the June–September monsoon that drives most of the district's flood risk. The Shahi litchi harvest in May and June is a good window to see the district's signature crop before the rains arrive.
- Why does Darbhanga flood even during a normal monsoon?
Darbhanga's rivers — the Kosi, Gandak, Burhi Gandak, Bagmati, Kamala-Balan and Adhwara — carry catchments that are roughly 65% upstream in Nepal and Tibet, and their high sediment load has raised riverbeds above the surrounding plains. That means overbank flooding here can happen from rain that fell days earlier and hundreds of kilometers away, not just from local downpours.
- Is there a live rain radar for Darbhanga?
Yes — RainViewer's hyperlocal radar for Darbhanga draws directly from the India Meteorological Department (IMD), refreshing every 5 minutes with new scans instead of a periodic forecast update. The map covers the wider Mithila region including Madhubani and Samastipur, so a system building over North Bihar is visible before local rivers respond.
- Can I get a warning before rain hits Kusheshwarsthan block?
Yes — RainViewer's rain alerts can be set for a specific point like Kusheshwarsthan block or Darbhanga Airport, so residents and staff get a notification as a cell approaches instead of checking the map manually. That advance window is what has mattered most in years when Kamala-Balan flooding forced people onto embankments.
Track Rain in Darbhanga in Real Time
Darbhanga Airport's litchi exporters and the residents of Kusheshwarsthan block near the Kamala-Balan both depend on knowing what's coming before it arrives. In a district where 87% of the land is flood-prone and rivers carry water from Nepal and Tibet, the rain that matters most often isn't the rain falling overhead.
A generic forecast says light rain for Darbhanga this week. RainViewer's live hyperlocal radar shows the Kamala-Balan catchment already swelling upstream while Darbhanga's own sky stays clear — that is the gap that mattered most in the 2017 flood.
Track rain in Darbhanga — free Upgrade to Essential for alerts, forecasts, and full radar history
2-hour forecast in 5-minute slices
See whether a cell over the Kamala-Balan catchment is building toward the kind of surge that hit Kusheshwarsthan in 2017.
Rain alerts before arrival
Set an alert for Kusheshwarsthan block or Darbhanga Airport and get notified before a system arrives.
Direction arrows on the map
See whether a system is tracking in from the north, where Nepal and Himalayan rainfall feeds the Kosi and Kamala-Balan.
48 hours of radar history
Review the last 48 hours to see how the 2017 Kamala-Balan flood built before it reached Raghunathpur and Laxminiya.
Multiple locations
Track Kusheshwarsthan block, Darbhanga Airport, and the Kamala-Balan river at the same time.
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