No, it can never be too cold to snow. It can be too warm to snow, though.

Snow falls as tiny ice crystals from clouds. Two things have to happen:

• the air has to be below freezing, and
• there has to be enough water in the air for the crystals to grow.

So when people say it is "too cold to snow", what is missing is the water in the air, not more warmth. If the air holds enough water, snow can fall however cold it gets.

Fun snow facts

• Most snowflakes are less than half an inch across.
• Snow looks white, but each ice crystal is really see-through, like glass.
• Fresh snow makes everything sound quieter, because it soaks up sound.