July in Fort MacKay is the warmest month of the year. In July, the weather in Fort MacKay is typically warm. Average daily high temperature in July is about 23 degrees above zero. On average, Fort MacKay has 17 partly cloudy, 9 sunny, 3 rainy, and 2 cloudy days in July. The rains are usually light. July as well as August is considered the most comfortable time to visit Fort MacKay.