This is the 306th most frequent Thai word.
เมฆมาก
Mostly cloudy.
In this context, 'เมฆมาก' describes the weather condition of having many clouds in the sky.
วันนี้ท้องฟ้าเมฆมากและอากาศเย็นลง
Today, the sky is cloudy and the weather is cooler.
Here, 'เมฆมาก' is used to refer to specific times when there are a lot of clouds covering the sky.
ช่วงเมฆมากแสงแดดมักจะสว่างน้อยลง
During cloudy periods, sunlight tends to be less bright.
In this example, 'เมฆมาก' is understood as a phenomenon where there is a high concentration of clouds.