Cucumbers are usually more than 90% water.

The story behind the answer

True. Cucumbers are about 95–96% water by weight, which is why they’re so crisp, low in calories, and refreshing. That high water content helps with hydration and contributes small amounts of electrolytes like potassium.

Fun context: Cucumbers belong to the Cucurbitaceae family (with melons and squashes), many of which are also water-rich. The saying “cool as a cucumber” likely ties to their water-heavy flesh, which loses heat slowly and can feel cooler to the touch. Memory tip: think of a cucumber as a “crunchy water bottle.” Similar high-water foods include iceberg lettuce, zucchini, and tomatoes—great snacks for staying hydrated, especially in hot weather.