What shape are raindrops?

Raindrops are not teardrops. Small drops are round, and larger falling drops are flattened underneath by the air pushing up against them, so they look more like a hamburger bun: domed on top, flat on the bottom.

What's actually true

Falling raindrops look like hamburger buns, not teardrops. The classic teardrop shape is an illustrator's invention. Very small raindrops are round, held together by surface tension. Bigger drops get flattened on the bottom by air pushing up against them as they fall, so they end up domed on top and flat underneath, much like a burger bun.

Takeaway: Next time you draw rain, round it off and flatten the bottom.

Why people believe it

We almost never see a single falling drop clearly, so our picture comes from drawings, logos and weather icons, and they all use the teardrop. That shape does exist, but in a different place: a drip hanging from a tap or a leaf, stretched by gravity before it lets go. Once a drop is falling freely, surface tension and air resistance take over and the point disappears, but the cartoon version is the one everyone remembers.

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