July in Alloa is the warmest month of the year. In July, the weather in Alloa is typically warm. Average daily high temperature in July is about 16 degrees above zero. On average, Alloa has 23 rainy, 3 sunny, 3 cloudy, and 2 partly cloudy days in July. The rains are usually heavy. July as well as January, February, March, and April is considered the most uncomfortable time to visit Alloa.