The Hornisgrinde belongs to the precipitation-richest places in Germany. The average yearly precipitation amounts to 1931 mm. Over 99% of the measuring points of the German weather service indicate lower values. The driest month is February; at most it rains in June. There's 1.4 times more precipitation in the precipitation-richest month than in the driest one. The seasonal precipitation fluctuations lie in the upper third. In over 81% of all places the monthly precipitation varies less.