August in Nizhniye Klyuchi is the rainiest month of the year. In August, the weather in Nizhniye Klyuchi is typically warm. Average daily high temperature in August is about 21 degrees above zero. On average, Nizhniye Klyuchi has 10 partly cloudy, 9 rainy, 8 sunny, and 4 cloudy days in August. The rains are usually moderate.