You might be interested in the following page, which explains different levels of frost:
http://www.almanac.com/content/frost-chart-united-states
Also, here is another that talks about how to predict frost:
http://www.almanac.com/blog/almanac/musings/how-predict-frost
As to the Moon and frost, there are a few proverbs related to this, such as “Clear Moon, frost soon.” This particular saying refers to the fact that when the night sky is clear, Earth’s surface cools rapidly—there is no cloud cover to keep the heat in. If the night is clear enough to see the Moon and the temperature drops enough, frost will form. Expect a chilly morning!
You might be interested in the following page, which explains different levels of frost:
http://www.almanac.com/content/frost-chart-united-states
Also, here is another that talks about how to predict frost:
http://www.almanac.com/blog/almanac/musings/how-predict-frost
As to the Moon and frost, there are a few proverbs related to this, such as “Clear Moon, frost soon.” This particular saying refers to the fact that when the night sky is clear, Earth’s surface cools rapidly—there is no cloud cover to keep the heat in. If the night is clear enough to see the Moon and the temperature drops enough, frost will form. Expect a chilly morning!