In April, the weather in Ulyanovsk is typically warm. Average daily high temperature in April is about 10 degrees above zero. On average, Ulyanovsk has 10 cloudy, 9 rainy, 6 sunny, and 5 partly cloudy days in April. The rains are usually light. April as well as January, February, March, and October is considered the most uncomfortable time to visit Ulyanovsk.