From what even cloudy but not rainy days the grass mown in the meadow dries out faster than the grass mowed in the forest.

The rate of evaporation is influenced not only by the temperature of the surrounding air, but also by its (air) movement. Those. at the same temperature if there is wind, i.e. air movement, then evaporation (drying of the grass) is faster, because moving air molecules carry with them part of the moisture molecules that are on the grass, respectively, the grass dries up. And since there are no trees in the meadow, but in the forest there are, then nothing hinders the wind, and in the forest the wind is weaker or hardly occurs, therefore the grass dries longer.