On average, the annual precipitation rate at the Plitvice Lakes is 1,500 mm (59.06 in).
Usually, in spring and fall (autumn) the largest rain quantities are measured.
The average relative air humidity is 81.8 percent.
In January, the average temperature is 2.2 °C (36 °F).
During the summer months of July and August, the temperature rises to 17.4 °C (63 °F).
The general average annual temperature is 7.9 °C (46 °F).
Snow falls from November until March.
Usually, the lakes are frozen during December and January.

The water temperature at the springs is usually below 10 °C (50 °F).
Within the rivers and lakes, the water temperature rises up to 20 °C (68 °F).
The following example for different water temperatures measured on July 7, 1954 demonstrates large temperature differences within the lakes: Within lake Kozjak at the depth of 4 m a temperature of 18.9 °C (66 °F) has been measured.
At a depth of 20 m, 5 °C (41 °F) have been measured.
At 44 m depth, virtually at the bottom of the lake, a temperature of 4.1 °C (39 °F) has been measured.
On average, the annual precipitation rate at the Plitvice Lakes is 1,500 mm (59.06 in). Usually, in spring and fall (autumn) the largest rain quantities are measured. The average relative air humidity is 81.8 percent. In January, the average temperature is 2.2 °C (36 °F). During the summer months of July and August, the temperature rises to 17.4 °C (63 °F). The general average annual temperature is 7.9 °C (46 °F). Snow falls from November until March. Usually, the lakes are frozen during December and January.
The water temperature at the springs is usually below 10 °C (50 °F). Within the rivers and lakes, the water temperature rises up to 20 °C (68 °F). The following example for different water temperatures measured on July 7, 1954 demonstrates large temperature differences within the lakes: Within lake Kozjak at the depth of 4 m a temperature of 18.9 °C (66 °F) has been measured. At a depth of 20 m, 5 °C (41 °F) have been measured. At 44 m depth, virtually at the bottom of the lake, a temperature of 4.1 °C (39 °F) has been measured.
Plitvice Lakes National Park