In April, the weather in Biên Hòa is typically hot. Average daily high temperature in April is about 33 degrees above zero. On average, Biên Hòa has 22 rainy, 6 cloudy, 1 sunny, and 1 partly cloudy day in April. The rains are usually heavy. April as well as May, June, July, and August is considered the most uncomfortable time to visit Biên Hòa.