Freeze and Frost Dates

Via Survival

The most important factor in determining when to plant a certain type of vegetable in your garden is the “Last Freeze Date” in the spring, and the “First Freeze Date” in the fall for your area. These dates for a given area are based on historical weather data from that area over a 30 year period compiled by the National Climatic Data Center.

The actual dates that the freezing temperatures occurred each year in a given area, during this 30 year period, are averaged together. Probabilities of a freeze occurring are then assigned to these average dates.

Let’s look at an example.

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