Description:
The correct answer is:
✅ Autumn and winter
Why?
Radiation fog typically forms during autumn and winter due to ideal conditions:
Longer Nights: More time for radiative cooling (heat loss from the ground).
Clear Skies: Enhanced cooling without cloud insulation.
Calm Winds: Prevents mixing of air layers.
Higher Humidity: Cool air reaches dew point faster.
Why Not Spring/Summer?
Shorter nights and warmer temperatures reduce fog formation.
Summer fog is more likely advection fog (e.g., coastal sea fog).
Fun Fact: Radiation fog is common in valleys—cold air drains downward, creating "fog lakes"! 🌫️🏞️
Safety Tip: Drive with low beams in fog—high beams reflect back and worsen visibility! 🚗💡