When should I visit Miami, United States, for the best experience?

The 1991–2020 daily normals for the Miami International Airport station give the shape of the year precisely. Normal maximums run 76 to 77°F (24 to 25°C) in January, climb to 80 to 82°F (27 to 28°C) through March and 82 to 85°F (28 to 29°C) in April, peak at 90 to 91°F (32 to 33°C) in July and August, then ease to 88 to 90°F (31 to 32°C) in September, 84 to 88°F (29 to 31°C) in October and 80 to 83°F (27 to 28°C) in November.

Rainfall separates the seasons far more sharply than temperature does. Normal precipitation at the same station runs about 0.04 to 0.06 inch per day across January. By August it is 0.27 to 0.35 inch per day and in September 0.31 to 0.36 inch per day — a different order of wetness sustained day after day, which makes for a different kind of holiday rather than a slightly damper one.

There is a food calendar layered on top of the weather one. Florida's stone crab harvest, recreational and commercial, opens on October 15 and runs through May 1, closing on May 2. That window is almost exactly the dry season, which is why the dish and the weather are so often described together in Miami.

Everglades National Park, the city's natural counterweight, charges $35 for a private vehicle, valid for seven consecutive days at all park entrances. Seven days is generous enough that a single purchase covers two or three separate trips out of the city during one stay.

The seven-day validity on the Everglades vehicle pass is the detail that changes an itinerary. Because it covers all park entrances rather than a single gate, one $35 purchase lets you approach the park from more than one direction across a week — which matters in a park whose access points are far apart by road.

• December to February — The coolest normals of the year and the driest, with daily rainfall normals barely registering.
• March and April — Warmer at 80 to 85°F (27 to 29°C) with rainfall still modest, and the stone crab season still running.
• June to September — The daily rainfall normal climbs through the summer and peaks in September, so plan indoor time into every afternoon.

The dry season is also the busy season, and rates follow demand. Late summer and early fall carry the region's tropical weather risk, which can close roads and cancel flights at short notice. Everglades entrance fees apply year-round and are charged separately from any activity inside the park, so the $35 pass is the start of the cost rather than the whole of it.

The things-to-do answer in this group covers the Everglades pass options and city transit, and the food answer explains the stone crab rules behind that October-to-May window.