When should I visit Granada, Spain, for the best experience?

Granada's bargain with the calendar starts with geography: the city sits at about 2,200 feet (670 m) under the Sierra Nevada, whose highest summit, Mulhacén (11,413 feet, 3,479 m), is the tallest peak on the Spanish mainland. In May the snowfields still crown the range behind the Alhambra — the postcard geometry from the Mirador de San Nicolás — while the city below warms to the high 70s°F (around 25°C) and the Generalife's gardens run their great spring act: roses, orange blossom, cypress shade and the water channels at full flow. The monument itself, the Alhambra and Generalife UNESCO inscribed in 1984 (the Albaicín quarter was added in 1994), is a timed-entry system whose discipline shapes any visit: the Alhambra General ticket costs €22.27 bought online (the €21 base plus the management fee), tickets are released up to three months ahead on the Patronato's official portal (tickets.alhambra-patronato.es), and the Nasrid Palaces admit you only at the half-hour slot printed on your named ticket — missed slot, no entry, no refund. In May those slots sell out weeks ahead rather than months: book at release if you can, but the city's other seasons are harsher teachers.

May also loads the city's own calendar. The Cruces de Mayo (around May 3) fill plazas and Albaicín courtyards with flower-decked crosses, bars and dancing; Corpus Christi brings Granada's big fair week (late May or June, with the fairground and the gypsy zambras); and the build-up to the International Festival of Music and Dance (running since 1951, staged in the Alhambra's own courtyards in late June–July) starts filling the cultural pages. Tapas season is at its kindest now: the evening tapeo — a free tapa with every drink, a custom Granada defends as fiercely as León — runs past midnight in shirt-sleeve warmth.

Summer is the counterargument: July and August push past 95°F (35°C) on the vega, the snow leaves the sierra, and the Nasrid slots vanish a season ahead. Winter has real charms — the southernmost ski station in Europe runs on the sierra above the city, and January nights are properly cold — and October is the runner-up, with harvest light and easier tickets. But neither gives you roses, snow and fiesta in one frame. May does.

San Nicolás at dusk in May: the Alhambra's walls going rose-gold across the ravine, white sierra behind it, orange blossom in the air from a carmen garden below, and a guitar starting up behind you.

May's Alhambra has a second shift. The Nasrid Palaces' night visit (a separate ticket, about €12.73, on selected evenings) shows the stucco and tile under lamplight with the fountains audible and the day crowds gone — and night slots sell out more slowly than the famous morning ones. Book the day visit for the gardens and the Alcazaba, the night visit for the palaces' atmosphere; Grenadians consider the double the connoisseur's play.

• Book the Alhambra at release — Three months out on the Patronato's portal; named tickets, passport ID at the gate, the Nasrid slot immovable
• Aim mid-May — After Cruces' peak prices, before Corpus crowds, with the gardens at full spring
• Nights in the Albaicín — A carmen hotel puts the sunset mirador and the teterías on your doorstep

May's festival weeks compress the city: Cruces and Corpus dates move with the liturgical calendar, hotel prices spike around them, and the Alhambra's best slots (9–11 a.m. Nasrid entries) disappear first even in spring. Rain is May's one weather card — the vega can take Atlantic fronts that cool the city into the 50s°F — and the Sierra Nevada backdrop depends on the winter's snowfall: in a dry year the white crown thins early. Check the INM/AEMET forecast for the sierra as well as the city.

Fix May dates around (or deliberately inside) the fiesta weeks, buy the Alhambra General the day sales open for your dates, and add a Nasrid night visit.