100°C is the temperature at which steam bubbles can be maintained inside a body of liquid water (called “boiling”), making it evaporate a lot faster than at lower temperatures. But some water evaporates from its surface at pretty much any temperature, faster when temperature is higher.
What you see rising from the water isn’t exactly steam. Actual steam (water vapor) is invisible. The “steam” that you can see is numerous tiny water droplets which condense out of actual steam that cools off in the air above the water. They are visible in the same way that clouds and fog are visible.
Latest Answers