Miami Weather January 2025. Miami beach notes the coldest temperatures in january, with a high average of 73°f (22.8°c) and a low of 65.1°f (18.4°c). January is in the winter in.

What’s the weather like in miami (florida) in january 2025? Get the monthly weather forecast for miami, fl, including daily high/low, historical averages, to help you plan ahead.