USA · Climate data from NOAA
Key West dresses for a 24°C–32°C / 75°F–90°F window across the months we cover. Key West runs Florida-Keys-Caribbean — the southernmost incorporated city in the continental US (24.55° N, 90 miles north of Cuba), closer in dressing register to Havana or Nassau than to Miami. Conch Republic (the heritage 1982 secessionist micro-nation, born of a US Border Patrol roadblock) marks every April 23 with bandana-and-pirate-hat costume; Hemingway Days (Hemingway Look-Alike contest) runs around July 21 at Sloppy Joe's. The dressing register: cotton or linen everything, Margaritaville-flag-print Hawaiian-style shirts (Margaritaville Café founded 1985 by Jimmy Buffett — Key West's heritage brand), Lilly Pulitzer (Palm Beach 1959 but Key West-popular), Tommy Bahama, Caribbean Soul, La Te Da resort-wear, plus Kino Sandals (Key West-founded 1966 — handmade leather huaraches at $35-50, the local heritage souvenir). Hurricane season opens June 1; Atlantic hurricane peak August-September with mandatory-evacuation history. Atlantic UV index 10-11 (extreme) May-September; reef-safe SPF 50 mandatory inside the Florida Keys National Marine Sanctuary (which surrounds the island). Duval Street nightlife enforces no formal dress code — even at recognized restaurants, Hawaiian shirt + linen trousers reads correct.
Across the 4 months we cover: morning lows from 24°C / 75°F (May) to afternoon highs of 32°C / 90°F (June).
What to wear in Key West in May 2026: NOAA EYW data (30°C / 86°F afternoons, 24°C / 75°F nights), pre-hurricane shoulder season, and the Conch Republic resort uniform.
What to wear in Key West in June 2026: NOAA EYW data (32°C / 90°F afternoons, 26°C / 79°F nights), hurricane season opens, and the Conch Republic resort uniform.
What to wear in Key West in July 2026: NOAA EYW data (32°C / 90°F afternoons, 27°C / 81°F nights), peak summer + Hemingway Days, and the Conch Republic uniform.
What to wear in Key West in August 2026: NOAA EYW data (32°C / 90°F afternoons, 27°C / 81°F nights), peak hurricane season, and the Conch Republic uniform.
The neighborhood you sleep in affects what reads as appropriate more than the calendar does. Key West's style scene anchors on the districts below — each leaf page calls out the local register (smart-casual, undone, technical, party) so the capsule maps to the streets you'll actually walk on.
Every leaf page on this hub is built from four data layers: climate normals from NOAA; named-authority etiquette and style references (Vogue, Condé Nast Traveler, Business of Fashion, the relevant local press); resident write-ups and traveler-forum reports for the failure modes tourists get wrong; and the editorial avatar pool that visualises each capsule on a person rather than a moodboard. Every DO names a reason. Every DON'T names a failure mode. We retest before each seasonal refresh — the editorial-modified date at the bottom of each leaf is the receipt.
Climate numbers come from NOAA — the national meteorological service for USA. Daily highs and lows, rain days, and daylight hours are 1991-2020 normals (the international standard, refreshed every decade). Capsule pieces and what-to-avoid notes are stress-tested against Key West resident write-ups, named-stylist sources where the city has a documented uniform (Vogue Paris under Emmanuelle Alt for Paris, Vogue Japan and i-D Tokyo coverage for Tokyo, NYMag's The Cut for New York), and the failure modes locals actually flag in city forums and traveler reports.
Because the morning-low to afternoon-high swing inside one Key West month already changes the silhouette — and the swing between months is much bigger than that. May mornings start at 24°C / 75°F; June afternoons hit 32°C / 90°F. A single packing list that tries to span both ends up wrong at both. Each month here is a different capsule, calibrated to the climate band that actually shows up on the ground.
4 so far: May, June, July, August. We ship climate-and-event-distinct months only — adjacent months that share more than 60% of the same capsule pieces don't get separate pages, because near-identical leaves erode the credibility of every other page on the site. The full coverage plan is in our internal CLAUDE.md (the editorial brief governs every page that ships).
NOAA 1991-2020 normals are the version cited on every leaf — the international meteorological standard, updated by every national service every decade. We restate the numbers as raw averages on the leaf pages ("32°C / 90°F afternoons") rather than the year range, so the figures don't read as stale. The next normals refresh covers 2001-2030 and lands in 2031 — we'll bump every page when it does.
Editorial rule, enforced in CI: every DO line names a specific reason ("merino sinks under a trench so a damp morning doesn't show through your knit"); every DON'T names a specific failure mode ("suede stains the first time light drizzle catches it"). We ban "timeless," "elevate your style," "must-have," and "effortless" — they're the giveaway phrases of generic AI fashion writing. If a sentence could open any city's guide, it gets cut. Key West's guide reads like Key West, not like a packing-list aggregator.