"It rains when the sun is around three o'clock, and the wind is when the moon is around noon" is a proverb. The meaning of this proverb is -
If there is a sun halo, it will rain at midnight; if there is a moon halo, it will be windy at noon the next day.
Solar halo can be a precursor to weather changes to a certain extent. When there is a corona, the weather may turn cloudy or rainy.