Weather in Miami in December

How December compares

December is the 10th warmest month of the year in Miami and ranks 41st of 134 destinations we compare for December - see where else is hot in December. Within United States it is 2nd of 6 (United States in December). Against London's average high of 7.7°C in December, Miami is 16.5°C warmer by day and 16.9°C warmer at night.

Daytime and night-time in December

The typical December day in Miami peaks at 24.2°C, but that is an average: the warmest 10% of days reach 26.6°C or more. Roughly 1 in 2 days top 25°C and 1 in 1000 pass 30°C. Nights average 19.6°C; one night in ten drops to 13.7°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest December day here reached 30.1°C (2019-12-02) and the coldest night 5.1°C (2010-12-14).

Rain in December

Some rain (4-8 rainy days): about 8 days with 1 mm or more, 41 mm in total. Year to year it varies a lot - the wettest December was 2015 with 121 mm, the driest 2004 with 10 mm. Humidity averages 73%.

Sea temperature in December

The sea averages 24.9°C - warm enough to swim (22°c+). Depending on the year it ranges from 24.3°C to 25.6°C. For the warmest sea here, come in August (29.9°C).

Sunshine and daylight

Around 5.3 hours of sunshine a day (estimated from cloud cover), 10.4 hours of daylight: the sun rises about 07:00 and sets about 17:32 local time in mid-December. Average cloud cover is 49%.

Is December a good time to visit Miami?

Yes - it is one of the better months: warm days, manageable rain. The best months for Miami on our scoring are March, February, April; months averaging 25°C or more: Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov.

Warm days, swimmable sea and a cooler-evening catch

December's warmth should feel useful rather than overwhelming for a UK traveller. Around 49% of days reach 25°C, so light clothing makes sense during the day, though you should not expect every afternoon to feel hot. Average night lows are about 20°C, but the coldest 10% of nights fall to around 14°C or below. Pack a jumper or light jacket rather than relying entirely on summer clothes. The sea is warm enough for swimming, with a year-to-year December range of 24°C to 26°C. That makes time in the water a sensible option, although getting out may feel less comfortable on a cooler day. Humidity of 73% means the air can still feel humid despite the moderate temperatures.

Plan for some rain and limited winter daylight

Rain is a consideration, not a reason on its own to rule December out. There are about 8 rainy days, so keep outdoor plans flexible and bring a light waterproof. That figure does not mean those days are complete washouts, but neither should you assume any rain will pass quickly. Expect about 5.3 hours of sunshine within 10.4 hours of daylight: enough to make outdoor time worthwhile, without promising clear skies throughout the day. Put swimming and other daylight-dependent plans earlier rather than leaving them until late afternoon. With a London flight of about 9 hours 42 minutes, this is a long-haul commitment for warmth, so it suits travellers happy with mixed winter weather rather than guaranteed heat.