Averages for Bali in April. Weather lowdown. The month of April in Bali sees temperatures continuing to climb, almost to the hottest they are for the entire year. The average temperature this month is 27°C (81°F), while the average low is 22°C (72°F), and the average high is a stifling 32°C (90°F). The beginning of April starts with a decent chance of rain, although not nearly as much as in the months coming before it, as well as a mixture of overcast and sunny days, a...