Jaipur's monsoon runs roughly from the start of July into the middle of September, and the city takes something like 330mm of its annual 550mm or so in those few weeks. Most of it arrives in bursts rather than in the all-day grey of a European autumn: July typically brings around 180mm across about ten rainy days, August is usually the wettest month at close to 200mm, and September tails off to roughly 80mm over five. A total washout is rarer than those averages make it sound. But when the rain does break properly over the Pink City, the open-air half of the sightseeing list becomes miserable and in places genuinely unsafe. Sandstone ramps turn greasy, the marble instruments of the Jantar Mantar are no fun in a downpour, and the climb at Amber is a bad idea in the wrong shoes.
The good news is the thing most visitors never discover: the Pink City has far more interior than they ever see, and much of it connects without your having to stand in the rain. When Sawai Jai Singh II laid out the walled city in 1727 he built its bazaar frontages as continuous colonnades, shopfronts set back behind a covered verandah that runs, with gaps, for hundreds of metres at a stretch. That grid, with its chaupars and its arcades, is why the walled city was inscribed by UNESCO in 2019, and it is also very good shelter. Add the metro line running underneath it and a handful of serious museums, and a wet day in Jaipur becomes one of the better days of a Rajasthan trip rather than a write-off.
What follows is a full day, timed, with the substitutions you will need when something turns out to be shut.
Before you set out: four decisions that shape the day
Check the day of the week before anything else. This matters more in monsoon than at any other time of year, because the Albert Hall Museum, the anchor of the afternoon, takes its maintenance day every Monday from April through September. (From October to March it is the last Tuesday of the month instead.) The Museum of Legacies and Jawahar Kala Kendra also close on Mondays; the Amrapali Museum closes on Sundays; and the Anokhi Museum out at Amber shuts for annual gallery maintenance for roughly six weeks from the end of May into the middle of July. A Monday in August is a poor day on which to attempt this itinerary without a rethink, and there is a Monday plan further down.
The composite ticket is probably not for you in the rain. Rajasthan's archaeology department sells a combined ticket valid for two consecutive days across Amber Fort, the Albert Hall, Hawa Mahal, Jantar Mantar, Nahargarh Fort, Isarlat and two garden sites. Expect to pay somewhere around INR 400 for Indian nationals and around INR 1,000 for foreign visitors, sold at the monument counters themselves. It is excellent value in January. In a wet week, six of those eight sites are open to the sky, so unless you are confident of a dry spell you may do better buying Hawa Mahal and the Albert Hall separately. Note too that the City Palace is run by the royal family's trust rather than by the state, and is not on the composite ticket at all.
Learn the metro, because it is the dry way across town. The Pink Line runs elevated through the newer city and then dives underground beneath the walls, with stations at Chandpole, Chhoti Chaupar and Badi Chaupar. Badi Chaupar surfaces at the top of Johari Bazaar, a few minutes under the arcades from both the Hawa Mahal and the City Palace. Fares are distance-banded and small, roughly INR 10 to INR 30, and trains typically run from early morning until around nine at night. On a day when the junctions are flooded and the autorickshaws have given up, this is the transport that cares least about the weather.
Leave far bigger gaps than you would in winter. Jaipur's low-lying crossroads waterlog quickly and traffic can seize completely for an hour at a time. The times below are a spine, not a schedule; assume every transfer takes twice as long as the map claims. If you are still choosing where to stay for the season, base yourself inside the walls or in C-Scheme. The shorter the distance between your bed and the arcades, the better this day goes.