Reword the sentence and make it easier to understand.
Sentence: "The decrease in temperature started just before the sun came up."
"The temperature began to drop right before sunrise."
Complete the following task based on the instruction and optional input provided.### Instruction:
Reword the sentence and make it easier to understand.

### Input:
Sentence: "The decrease in temperature started just before the sun came up."

### Output:
"The temperature began to drop right before sunrise."