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What is a blue moon?

The term is used when a full moon occurs twice in the same calendar month.

It happens every 2.7 years and never in the month of February since there are not enough days.

Is the moon really blue, though?

It depends, most moons are not blue!

However, if there is a volcanic eruption or even a forest fire the smoke in the sky can turn the moon a blue color.


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High Low
Current 85°F 55°F
Average 65°F 43°F
Record 92°F April 30, 1942 29°F April 30, 1931