July in Birr is the rainiest, the cloudiest, and the warmest month of the year. In July, the weather in Birr is typically warm. Average daily high temperature in July is about 16 degrees above zero. On average, Birr has 28 rainy, 2 sunny, and 1 cloudy day in July. The rains are usually heavy. July as well as January, February, March, and April is considered the most uncomfortable time to visit Birr.