How long does it take for milk to spoil unrefrigerated?
I don't think anything will be wrong with that milk.


If it's fresh milk, which I doubt, you should consume it in less than three days.
If it's pasteurized milk, which is much more likely, it'll be unaffected.


Signs of spoilage are a sour smell and sour taste. You should make a habit of always smelling your milk (food) before drinking (eating) it. If it doesn't smell like you'd expect, taste it. If it doesn't taste like you'd expect, ditch it.

Milk is cultivated with lactobacillus, a bacteria that's beneficial for us. So, even though milk may taste sour, it doesn't mean that it's undrinkable. In Holland, there's sour-milk (karnemelk), that some people consume (I don't like it, myself).

Under the right circumstances, milk will turn into yogurt, thanks to the lactobacillus...

At any rate, if in doubt, throw it out.