Description:

✅ Condensation on surfaces

How Frost and Dew Form:

Clear Skies & Calm Winds:

Allows surfaces (grass, cars, etc.) to cool rapidly at night by radiating heat into space.

High Humidity:

Moisture in the air condenses onto cold surfaces as dew (if temps are above freezing).

If surfaces are below freezing, the water vapor turns directly into frost (deposition).

Cold Surface Temps:

Frost forms when the surface temperature is ≤ 32°F (0°C), even if air temps are slightly higher.

Why Not the Others?

❌ Solar radiation: Drives evaporation, not frost/dew (which happen at night).

❌ Geomagnetic activity: Affects auroras, not local condensation.

Pro Tip: Frost is more likely on clear, windless nights—clouds or wind act like a "blanket," slowing surface cooling. ❄️🌙