Weather in Miami in January

How January compares

January is the 12th warmest month of the year in Miami and ranks 41st of 134 destinations we compare for January - see where else is hot in January. Within United States it is 2nd of 6 (United States in January). Against London's average high of 7.4°C in January, Miami is 15.8°C warmer by day and 15.8°C warmer at night.

Daytime and night-time in January

The typical January day in Miami peaks at 23.2°C, but that is an average: the warmest 10% of days reach 26.1°C or more. Roughly 1 in 3 days top 25°C. Nights average 18.0°C; one night in ten drops to 12.3°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest January day here reached 28.3°C (2010-01-22) and the coldest night 3.3°C (2010-01-10).

Rain in January

Some rain (4-8 rainy days): about 8 days with 1 mm or more, 52 mm in total. Year to year it varies a lot - the wettest January was 2016 with 154 mm, the driest 2006 with 6 mm. Humidity averages 71%.

Sea temperature in January

The sea averages 23.9°C - warm enough to swim (22°c+). Depending on the year it ranges from 23.1°C to 24.7°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), 10.6 hours of daylight: the sun rises about 07:09 and sets about 17:51 local time in mid-January. Average cloud cover is 50%.

Is January a good time to visit Miami?

It is a reasonable choice: warm days. 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 rather than hot, with cooler spells

January's warmth should feel comfortable for spending time outdoors, rather than forcing you indoors at midday. Around 32% of days reach 25°C, so hotter afternoons are possible but should not be the basis of your plans. London averages just 7.4°C by day in January, making Miami a clear step up even in its coolest month. The main packing mistake would be treating it as reliably tropical: the coldest 10% of nights fall to around 12°C or below. Bring light daytime clothes, plus a jumper and a light jacket for evenings or a cooler spell. This month suits travellers who prefer warmth they can walk around in to strong heat.

Swimming is realistic; all-day sunshine is not

The sea averages 23.9°C, warm enough for swimming, with January temperatures ranging from 23°C to 25°C between years. That makes time in the water a reasonable part of the holiday rather than just an optimistic extra. Getting out may feel less inviting on a cooler day, so keep a dry layer handy. Expect about 5.3 hours of sunshine within 10.6 hours of daylight: there is room for outdoor plans, but not a promise of clear skies throughout the day. If swimming is your priority, leave your schedule flexible so you can use the warmer, sunnier afternoons instead of committing every beach visit in advance.

Allow for rain without writing off the month

Rain is a consideration rather than a reason to rule January out. There are about 8 rainy days, so a completely dry holiday is not something to count on. That figure does not tell you how long rain will last on any particular day, so avoid assuming either brief showers or whole days indoors. A light waterproof and flexible outdoor plans are sensible. Humidity averages 71%, meaning the air can still feel humid despite the moderate temperatures. Overall, January is a good fit if you want warmth without peak heat and can accept mixed skies. It is less suitable if your main requirement is consistently hot sunbathing weather.