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Last update: 23:30, 7 Aug 2026
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Rain in Darjeeling: What You Need to Know
Darjeeling weather can turn a hillside into a hazard zone within a day. The 4-5 October 2025 extreme-rain event triggered 455 new landslides, damaged 5 bridges and affected 106 buildings — and it struck after the official monsoon window had already closed. A hyperlocal radar for Darjeeling exists because a burst like that builds fast against these ridges, well outside the calendar dates a seasonal forecast relies on.
The mechanism is orographic uplift against the Darjeeling-Kalimpong ridge, which the town sits on at roughly 2,050m elevation. Moisture-laden monsoon air is forced sharply upward against the ridge, wringing out the bulk of the region's rain — the Southwest monsoon supplies about 80% of Darjeeling's annual total, with July alone averaging 656–876mm over some 18 rainy days. Ridge topography splits the impact by elevation and by time: landslides strike the hilly Darjeeling Himalaya portion first, and floods hit the plains of Jalpaiguri district afterward, with a documented lag between the two — meaning a forecast for "Darjeeling district" cannot tell a resident on the ridge whether today's danger is a landslide on their own slope or a flood still hours away on the plains below.
RainViewer draws its Darjeeling feed from the India Meteorological Department (IMD), refreshed every 5 minutes, so the live map reflects new radar scans rather than a forecast issued hours earlier. Darjeeling sits along the NH10 corridor toward Siliguri, so rain building over the ridge shows up on the same sweep before it reaches the Melli Bazar or Setijhora landslide points. What the live map reveals and a forecast cannot: whether a cell over the ridge is intensifying toward the kind of burst that closes the Darjeeling Himalayan Railway or triggers a new slide on NH10.
Rain by Season in Darjeeling
Southwest monsoon (June–September, peak July)
July is Darjeeling's wettest month, averaging 656–876mm over about 18 rainy days, and this window supplies roughly 80% of the town's annual rainfall. Tea gardens see their heaviest waterlogging risk in this stretch, right after the prized second flush.
Unpredictable shoulder months (April–May and October)
Pre-monsoon April and May, and post-monsoon October, are the least predictable stretches — the 4-5 October 2025 landslide event hit after the official monsoon window had already closed, catching the region outside its usual guard.
Dry season (December–February)
December through February is cold and dry, with December the driest month at around 2.9mm. This is the calmer stretch for both tea garden work and the Darjeeling Himalayan Railway's Toy Train schedule.
Why You Need a Rain Radar in Darjeeling
Drivers and residents near NH10 landslide points at Melli Bazar and Setijhora
NH10, the main highway linking Darjeeling and Kalimpong to Siliguri, has been closed by landslides at Melli Bazar/Garadijhora and Setijhora/Selfidanra in past monsoon seasons. Checking the radar before a trip shows whether rain building over the ridge ahead is likely to trigger a new slide.
Darjeeling tea garden workers
Erratic rainfall and temperature shifts have cut Darjeeling tea production nearly in half, from 12 million kg in 2014 to 6 million kg in 2024, with 13 gardens closed in the past decade. A garden supervisor checking the radar around the prized May–June second flush can time picking crews before monsoon rain intensifies in July.
Darjeeling Himalayan Railway (Toy Train) operators and passengers
Toy Train services are suspended during heavy monsoon rain, disrupting the UNESCO-listed route that anchors much of the town's tourism. Checking the radar before boarding shows whether a cell over the ridge is likely to force a suspension that day.
Visitors during the April–June and October–November tourism peaks
Tourism runs heaviest in these two windows, and some estates now run "tea tourism" to offset production losses from erratic monsoon rain. Checking the radar before a hillside walk or garden visit helps travelers avoid a burst that arrives outside the official monsoon calendar, like the 4-5 October 2025 event.
Travelers through Bagdogra Airport and Siliguri Junction
Bagdogra Airport (IXB), reached via NH10, and Siliguri Junction both see cascading cancellations and diversions when North Bengal monsoon flooding hits, cutting road and rail access to Darjeeling. Checking the radar before the final leg of the trip shows whether rain over the ridge is likely to delay the connection.
RainViewer Radar Coverage in Darjeeling
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. Darjeeling sits in that sparser foothills band alongside Kalimpong and Siliguri, so rain building over the ridge toward the Tista basin and Jalpaiguri's plains is still visible before it reaches NH10's landslide points.
Darjeeling Rain Radar: Frequently Asked Questions
- Is it raining in Darjeeling right now?
The fastest way to know is a live hyperlocal radar, since orographic bursts against the Darjeeling-Kalimpong ridge can turn a clear morning into landslide-triggering rain within hours. RainViewer pulls fresh India Meteorological Department (IMD) radar scans every 5 minutes, so the map reflects current conditions rather than a forecast written hours earlier.
- Can I ride the Darjeeling Himalayan Railway during monsoon season?
Toy Train services are suspended during heavy monsoon rain, which peaks in July when the Southwest monsoon supplies about 80% of Darjeeling's annual rainfall. Checking the radar before boarding shows whether a cell over the ridge is building toward the kind of burst that forces a suspension that day.
- Does rain disrupt travel on NH10 near Darjeeling?
NH10, the main highway linking Darjeeling and Kalimpong to Siliguri, has been closed by landslides at Melli Bazar/Garadijhora and Setijhora/Selfidanra during past monsoon seasons. Checking the radar before setting out shows whether rain building over the ridge ahead is likely to trigger a new slide.
- Does Darjeeling flood when it rains?
Darjeeling town itself is more exposed to landslides than direct flooding, but rain falling on its ridges drives flooding downstream in the Tista river basin's Jalpaiguri district plains, as seen after the 4-5 October 2025 event that triggered 455 new landslides. The historic benchmark remains the October 1968 Tista basin floods and landslides, the region's worst recorded disaster.
- When is the best time to visit Darjeeling to avoid heavy rain?
December through February is Darjeeling's driest stretch, with December averaging just 2.9mm of rain, well clear of the June–September monsoon that supplies about 80% of the year's total. Tourism also peaks in the drier shoulder windows of April–June and October–November, though visitors should watch the radar closely in early October since the 2025 landslide event hit after the official monsoon season had ended.
- Why does rain in Darjeeling town not always match flooding downstream?
Darjeeling's ridge topography splits impact by elevation and by time: landslides strike the hilly Darjeeling Himalaya portion first, and floods hit the plains of Jalpaiguri district afterward, with a documented lag between the two events. That means rain easing in Darjeeling town does not mean the danger has passed — it may still be moving downstream toward the Tista basin.
- Is there a live rain radar for Darjeeling?
Yes — RainViewer's hyperlocal radar for Darjeeling 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 ridge corridor toward Kalimpong and Siliguri, so a cell building against the Darjeeling-Kalimpong ridge is visible before it reaches NH10's landslide points.
- Can I get a warning before rain hits a specific point on NH10?
Yes — RainViewer's rain alerts can be set for a specific point like the Melli Bazar or Setijhora landslide zones on NH10, so drivers get a notification as a cell approaches instead of checking the map manually. That advance window matters most in July, when Darjeeling sees its heaviest monsoon rain of the year.
Track Rain in Darjeeling in Real Time
Drivers on NH10 near Setijhora and tea garden workers across Darjeeling's slopes both depend on knowing exactly where a cell against the ridge is going to land. Darjeeling's landslide risk builds fast and locally, and a forecast for "Darjeeling district" cannot show which stretch of highway or which garden is in the path.
A generic forecast says moderate rain for Darjeeling this week. RainViewer's live hyperlocal radar shows a cell intensifying over the ridge above Setijhora while Darjeeling town itself stays dry — that is the difference between a routine shower and a highway closure.
Track rain in Darjeeling — free Upgrade to Essential for alerts, forecasts, and full radar history
2-hour forecast in 5-minute slices
See whether a cell over the ridge above Darjeeling is intensifying in the next two hours.
Rain alerts before arrival
Set an alert for the Melli Bazar or Setijhora landslide zones and get notified before rain reaches them.
Direction arrows on the map
See whether a cell is tracking up the ridge toward Darjeeling from the south or sliding toward Kalimpong instead.
48 hours of radar history
Review the last 48 hours to see how fast rain built before the 4-5 October 2025 event's 455 landslides.
Multiple locations
Track the NH10 corridor near Setijhora, Darjeeling's tea gardens, and the Toy Train route at the same time.
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