Freeze/Frost Probability Maps

The freeze/frost probability maps developed by Indiana State Climate Office are a great source for deciding field planting date. Figure 1 shows the average last day of 36°F or lower in Indiana; Figure 2 shows the dates, after which the last 36°F occurred in 1 in 10 years (10% chance).

Figure 1. Average date of last spring frost 36 F or lower

Figure 1. Average date of last spring frost 36 F or lower

 

Figure 2. The last 36 F occurred in one in 10 years after the dates

Figure 2. The last 36 F occurred in one in 10 years after the dates

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