Miami Weather May 2025 Average Temperature. The climate in miami beach during may can be summarized as hot, humid and wet. These temperatures are far removed from those records observed in.
As the month progressed, temperatures tended to noticeably warm up, reaching an average of 29.6 ° f by. Miami beach registers a gentle descent to an average nighttime low of 77°f (25°c) in may from its daytime highs.