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Freezing Degree Days (FDD) Calculator

Calculate Freezing Degree Days (FDD)



Formula

The formula to calculate the Freezing Degree Days (FDD) is:

FDD=(Tavg32)×D

Where:

Definition

Example

Let's say the average daily temperature (Tavg) is 20°F and the number of days (D) is 10. Using the formula:

FDD=(2032)×10=120

So, the freezing degree days (FDD) is -120.