Temperatures in some parts of China will fall below freezing tomorrow.

明天中国部分地区的气温将降至零度以下。

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He was lucky to survive in the two-day journey crossing Bolivia's Andean Altiplano, where temperatures at night can fall below freezing.

玻利维亚安第斯高原在夜间气温会降至零摄氏度以下，他在两天的旅程后能幸存下来实属幸运。

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Tonight temperatures will fall well below freezing (point).

今夜温度将远降至冰点以下。

《牛津词典》

In climates where temperatures fall below freezing, plant mums at least six weeks before the first frost is expected.

VOA: special.2010.06.29

Widespread ice has been forecast for the north of England and Scotland overnight as temperatures fall below freezing.

BBC: Snow delays on the M77 in Scotland