Hail?
The water drops are likely coming from condensation, where warm air comes into contact with a cooler surface and causes the water vapor in the air to condense into liquid form. This process happens when the temperature is above the dew point temperature, where the air can no longer hold all the water vapor it contains.
Frost is to dew. Frost forms on surfaces when the temperature drops below freezing, while dew forms on surfaces when the temperature cools enough to cause condensation.
Rime frost is freezing water vapor that condenses at ground level.
Dew forms when the temperature of the surfaces near the ground drops below the dew point temperature of the surrounding air. Frost forms when the temperature of the surface itself drops below freezing (32°F or 0°C), causing the water vapor in the air to freeze directly onto the surface. So, you can find dew and frost outside when the air temperature drops and reaches these specific thresholds.
When water vapor in the atmosphere freezes at ground level, it forms frost. Frost is a thin layer of ice that develops on surfaces like grass, cars, and windows when the temperature drops below freezing.
Depending on the temperature, water drops that fall when the temperature is below freezing can become sleet, ice, or snow.
The usual term is "sleet".
Water drops that fall when the temperature is below freezing, fall as SNOW . Water drops that fall when the temperature is above freezing fall as RAIN .
Snow
Roads typically become icy when the temperature drops below freezing, which is 32 degrees Fahrenheit or 0 degrees Celsius.
The temperature only drops below freezing occasionally.
Pipes in a house are at risk of freezing when the temperature drops below 20 degrees Fahrenheit.
If it freezes in the air, it is called sleet (ice pellets). If it freezes on contact with cold surfaces, it is called freezing rain (called glaze in the UK).
frost
Liquids become solids upon freezing. Most solids contract when they freeze. The expansion of water when it becomes ice is an unusual property.
The coldest temperature below freezing point is -273 degrees centigrade
frozen dew