When it does rain, it tends to be a very light rain that isn't troublesome.

下雨了一般也是小雨，不会造成太大的麻烦。

youdao

A light rain began to fall.

小雨开始飘落。

《牛津词典》

Very little light filters through the canopy of leaves and branches in a rain forest to reach ground level—or close to the ground—and at those levels the yellow-to-green wavelengths predominate.

在雨林中，很少有光透过树叶和树枝形成的树荫到达地面——或者接近地面——在这些高度上，黄色到绿色的波长占主导地位。

youdao

A light rain was falling. There was no one else on the road.

VOA: special.2009.06.18

The march began under gray skies and light rain symbolically at the Holocaust Museum, where the murder of six million Jews in World War II is documented and remembered.

VOA: standard.2010.05.23

Light snow or freezing rain was falling in northern areas of the state early Friday afternoon, with light rain reported elsewhere.

WSJ: A state-by-state look at the Northeast blizzard

The search proceeded cautiously for the fourth child as light rain fell throughout the afternoon.

NPR: 1 Child Dead, 1 Missing In Minn. Park Landslide

Farther south, dozens of flights were also canceled at Philadelphia Airport as a light rain fell.

WSJ: A state-by-state look at the Northeast blizzard