The monsoon gift is uniquely awkward for one reason: it implies the recipient has been managing badly so far. In joint family settings especially, gifting a raincoat to an elder carries an unspoken "you've been doing it wrong." The bahu who gifts her saas monsoon gear is filing that interaction away mentally, and so is the saas. The subtext is "you're unprepared," and some relationships can handle that, and some very much cannot. Know your audience before you proceed.
What actually survives more than one season: a proper windproof, auto-open compact umbrella (not the ₹80 footpath variety that inverts on your first coastal commute), a rain jacket with taped seams rather than just a polyester coating that soaks through by July, and a waterproof backpack or dry bag that protects whatever they already carry daily. For the office commute crowd, waterproof shoe covers are genuinely underrated since nobody wants to ruin decent leather footwear in the first week of June. These are daily-use items. They get used, unlike most gifts that sit on shelves and wait for a "right occasion."
The trap most people fall into: gifting anything fabric-based for the cozy rainy day vibe. Blankets, thick socks, scented candles. These feel thoughtful in theory. In a Mumbai or Pune flat with poor ventilation and three months of zero sunlight, fabric gifts start smelling within two weeks. The candle won't stay lit in a damp room. If they live alone in a studio or a hostel, bulky items are also a storage problem. Solve commute problems, not aesthetic ones.