Question

fog is formed during winter,
or summer or rainy season
​

Answer 1

Answer:

winter.............

Answer 2

The fog season is usually based in the cooler months (late autumn, winter and early spring). An example is found in the San Joaquin Valley and Sacramento Valley areas of California's Great Central Valley, where a thick ground fog, known as Tule fog, may form, in particular in the months from November through March.