D&NH and DD Weather, AQI and Fuel Prices

Why Check Dadra and Nagar Haveli and Daman and Diu's Weather & Data?

This Union Territory is unlike any other entry on this site: two non-contiguous pieces of land, inland Dadra and Nagar Haveli bordering Gujarat and Maharashtra, and the coastal enclaves of Daman and Diu sitting on Gujarat's own Arabian Sea coastline, merged into a single administration in January 2020. Its 2011 Census population of 586,956, 343,709 in Dadra and Nagar Haveli, 191,173 in Daman and 52,074 in Diu, is tiny by Indian standards, smaller than many single districts, yet Silvassa's industrial belt produces close to 80 percent of India's texturising yarn and roughly 28 percent of the country's plastics, drawing manufacturers who once came for the UT's tax incentives and stayed for the supply chain that grew up around them. Merchandise exports touched ₹40,209 crore, about $4.65 billion, in 2024-25, and 35,889 MSMEs were registered here as of February 2026. Neither MoSPI nor the UT administration compiles an official state domestic product estimate for this territory, so no verified per-capita income figure exists to quote here, unlike for a full state. What the numbers do show is an economy split in two: Silvassa's factories run on grid power and monsoon logistics, while Daman and Diu, under Portuguese rule for four centuries until 1961, run on a beach and heritage tourism season that peaks in the same winter months industrial output is highest. This page's live weather, AQI and fuel data serve a Silvassa factory manager watching a flood advisory as closely as a Diu hotel owner watching the pre-monsoon cyclone outlook.

Daman's Cyclones, Silvassa's Floods: The UT's Two Real Risks

Because Daman and Diu sit on the same Arabian Sea coast as Gujarat, they carry the same cyclone exposure, even when a storm's actual landfall happens hundreds of kilometres away. When Cyclone Biparjoy intensified into a very severe cyclonic storm in June 2023, the Indian Coast Guard issued a formal advisory to fishing communities and stakeholders across Gujarat, Daman and Diu, and fishing was suspended through June 15; Daman's own seafront was lashed by waves large enough to make national news on June 15, 2023, even though the storm's eventual landfall came near Jakhau Port in Kutch, roughly 400 kilometres north, with sustained winds of 115 to 140 kmph. Inland, Dadra and Nagar Haveli depends on the same southwest monsoon as interior Gujarat and Maharashtra, and that dependence turned destructive on August 25, 2024, when official rainfall data recorded 235.60mm in a single day in Dadra and Nagar Haveli and 264.80mm in Daman, part of a season that totalled more than 3,100mm by late October. The risk is current, not historical: in late July 2026, listed company Hindustan Foods disclosed to stock exchanges that its Aero Care Personal Products LLP unit in Silvassa's Naroli village had to suspend operations after unprecedented heavy rain flooded the facility, with parts of the plant left inaccessible for damage assessment days later.

How to Use the UT's Data for Daily Decisions

Silvassa's factory managers and MSME owners, running units that anchor much of the UT's industrial base, should treat any red or orange rainfall alert during July and August as a genuine production risk, not routine monsoon weather, given how quickly waterlogging shut down a listed manufacturer's Naroli facility in 2026. Daman and Diu hotel and beach-shack operators should track the Arabian Sea cyclone outlook through the pre-monsoon window, April to June, the same months Biparjoy forced a coastwide fishing suspension in 2023, and again in the shorter post-monsoon window from October to December. Fishermen working out of Daman and Diu should treat any Coast Guard or IMD advisory as an immediate stand-down signal, exactly as the fleet did before Biparjoy, rather than waiting to judge sea conditions firsthand. Farmers in Dadra and Nagar Haveli's smaller rain-fed plots should follow the same monsoon-onset tracking that Gujarat and Maharashtra farmers use, since the UT shares their rainfall pattern rather than having a distinct one of its own. Visitors planning a Daman or Diu trip around the winter tourist season should still check the short-range forecast before a beach day, since even the dry season can bring an occasional squall off the Arabian Sea.

The UT's Seasonal Calendar

Monsoon reaches this UT around the same time it reaches south Gujarat and Mumbai, roughly June 10 to 15, and holds through September, the period when both Silvassa's factories and Daman's low-lying seafront face their real flood risk. The Arabian Sea's two cyclone windows, April to June and October to December, matter more here than anywhere inland in Gujarat or Maharashtra, since Daman and Diu sit directly on the coast those storms track along, even when landfall itself happens further north near Kutch or Saurashtra. Winter, November through February, is this UT's calmest and busiest tourism stretch: dry, mild weather draws visitors to Diu and Daman's beaches, and the UT government's own Festa de Diu runs across nearly the entire season, December through February, billed as Asia's longest beach festival. Summer, March to June, brings coastal humidity rather than the extreme dry heat interior Gujarat sees, though it remains the season to watch the pre-monsoon cyclone outlook most closely. Anyone travelling between Daman, Diu and the inland Dadra and Nagar Haveli district, a genuinely unusual commute that crosses two other states' territory, should check both legs of the route separately during monsoon months, since rainfall and road conditions can differ sharply between the coast and the interior.

DNH & DD vs Gujarat & Maharashtra: Weather & Data Comparison

Gujarat and Maharashtra figures are reused from this site's own already-published pages for internal consistency; figures for this UT are freshly sourced. Treat this as a broad reference, not a single-source dataset.