What is the freezing point of concrete?

Answer 1

You're not supposed to pour concrete below 40ºf
There additives you can use in cold weather, and as concrete generates it's own heat as it cures, you can cover it with something insulative if it gets real cold.
We've poured footings and foundations when the temp was in single digits, but you'll need to add the special "antifreeze".

Answer 2

The freezing point of concrete is typically around 25°F to 30°F (-4°C to -1°C). At this temperature, the water in the concrete mix starts to freeze, potentially causing damage to the concrete structure if proper precautions are not taken. It is important to protect freshly poured concrete from freezing until it has fully cured.