The coming drop in temperature of your body will naturally make you feel sleepy.

身体温度的下降自然会让你感到困倦。

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There was a marked drop in temperature.

气温显著下降。

《新英汉大辞典》

Reducing the gas pressure also brings about a sudden drop in temperature, typically from 10c to -30c.

减低气压也会带来温度的骤降，通常是从10度降至零下30度。

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The evaporation process creates a drop in temperature of several degrees.

VOA: special.2009.02.09

In fact, they say, the sudden drop in temperature can be dangerous for people with underlying health issues.

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The children were so weak they couldn't cope when a tiny drop in the temperature came after sunset.

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There was also a perceptible drop in the temperature, and the breeze blowing over this desert village suddenly felt a lot cooler.

BBC: Under the Moon's shadow