West Palm Beach has a tropical rainforest climate with mean temperatures in all months above 64.4 °F (18 °C). The city is situated in USDA hardiness zone 10b, with an annual mean minimum temperature of 37.7 °F (3 °C).
The wet season—May through October—is hot, humid, and wet. The average window for 90 °F (32 °C) temperatures is April 15 through October 10, but temperatures of 100 °F (38 °C) or higher have only occurred four times since record-keeping began in 1888. During this period, more than half of the days bring afternoon thunderstorms and sea breezes that cool the air for the rest of the day. Late in the season, there is also a chance for a tropical storm or hurricane to strike.
The dry season—November through April—is warm and mostly dry, with 80 °F (27 °C) temperatures remaining fairly commonplace even from December through February. Occasionally, a stronger cold front can lower daytime temperatures to around 57 °F (14 °C), the annual mean minimum max temperature, and lows to around 38 °F (3 °C). Freezes are rare, the last occurrence in 2010. The dry season can also bring about potential for drought during hotter, drier seasons.