The rain fell all night long.

Meaning: This means that the rain was falling for the entire night without stopping.

Choice of Words: Rain is water falling from the sky. Fell means that the rain was coming down. All night means from evening until morning. Long means for a period of time. Put together, it means the rain was falling for the entire night.

Alternative Expressions

The rain kept falling all through the night.

Meaning: This means that the rain continued to fall throughout the whole night, without stopping.

Choice of Words: Kept means to continue doing something. Falling means to drop or move downwards. All means the complete duration of something. Through means during a period of time. Night is the time of day when it's dark and most people are sleeping.

The rain poured all night long.

Meaning: This means that the rain was falling very heavily throughout the whole night, from the time it got dark until the morning came.

Choice of Words: Poured means to rain heavily. All means the complete duration of something. Night is the time of day when it's dark and most people are sleeping. Long means a period of time that lasts for a while.

Related Expressions