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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Toronto Post Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The live forecast above shows Miami in December typically reaches daytime highs near 25°C and overnight lows around 17°C, with about 5–7 rainy days. It’s a warm, dry-ish escape from Canadian winter — comfortable for sightseeing and beach time, though not peak swimming heat.
What is the average temperature in Miami in December?
December averages in Miami: high 25°C, low 17°C. Sea temperatures hover near 24°C, making swimming possible but slightly cool for some. Rainfall totals about 50 mm spread over five to seven days, so pack a light rain jacket. These numbers come from the Miami weather archive.
Can you swim in Miami in December?
Yes, you can swim in Miami in December. The ocean averages 24°C — refreshing rather than cold. Many visitors and locals enjoy the water, especially on sunny afternoons. If you’re sensitive to cooler water, a wetsuit or waiting for the warmest part of the day helps. For more Florida beach conditions, see our Florida weather page.
What is Miami weather like on December 25?
Christmas Day in Miami is typically mild to warm, with highs near 24°C and lows around 16°C. Sunshine is common, though a brief shower is possible. It’s not a white Christmas, but perfect for outdoor holiday activities.
How does December compare to January in Miami?
January is slightly cooler: average highs drop to 24°C and lows to 15°C. Sea temperature falls to about 23°C. December is marginally warmer and has a bit more rain, but both months offer pleasant winter escapes.
What should I wear in Miami in December?
Light layers: shorts, T‑shirts, a sweater or light jacket for evenings. Pack swimwear and sandals for the beach, plus a rain jacket or umbrella. Evenings can feel cool, so a long‑sleeve top or light hoodie is useful. For more packing tips, check our Canada weather hub.