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🍂 First Frost Dates for McIntosh, South Dakota 57641

The first 36°F frost date is 30% likely to be on Sep 15. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Sep 22. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for McIntosh, SD are based on historical climate data.

Always check your local forecast for the most up-to-date frost warnings.

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What is a First Frost Date?

The first fall frost signals the end of your local growing season. This date serves as an important deadline for gardeners and farmers. You'll need to complete harvesting before this point. Annuals and other tender plants will die back when frost hits, and perennial plants will enter their dormant phase for winter. Meanwhile, it's time to enjoy a cup of hot cocoa and a cozy sweater—and start planning your spring garden!

How to use the First Frost Date?

Watch your local weather forecasts in early fall to predict the first frost date. Harvest tender crops and protect vulnerable plants before frost arrives. For late-summer plantings, count backward from your area's average first frost date. This ensures your crops have enough time to mature. Keep track of when frost actually occurs in your garden each year. This helps you identify protected spots where the growing season might last longer.

First Frost Date Probabilities

Probability of frost (36°F) on or before...
10% chanceSep 8
20% chanceSep 12
30% chanceSep 15
40% chanceSep 17
50% chanceSep 20
60% chanceSep 22
70% chanceSep 25
80% chanceSep 28
90% chanceOct 1
Probability of light freeze (32°F) on or before...
10% chanceSep 13
20% chanceSep 18
30% chanceSep 22
40% chanceSep 25
50% chanceSep 28
60% chanceSep 30
70% chanceOct 3
80% chanceOct 6
90% chanceOct 11
Probability of moderate freeze (28°F) on or before...
10% chanceSep 21
20% chanceSep 26
30% chanceSep 30
40% chanceOct 2
50% chanceOct 5
60% chanceOct 8
70% chanceOct 11
80% chanceOct 15
90% chanceOct 20
Probability of moderate hard freeze (24°F) on or before...
10% chanceSep 29
20% chanceOct 4
30% chanceOct 8
40% chanceOct 12
50% chanceOct 15
60% chanceOct 18
70% chanceOct 21
80% chanceOct 25
90% chanceOct 29
Probability of hard freeze (20°F) on or before...
10% chanceOct 9
20% chanceOct 15
30% chanceOct 19
40% chanceOct 22
50% chanceOct 25
60% chanceOct 28
70% chanceOct 31
80% chanceNov 3
90% chanceNov 9
Probability of severe hard freeze (16°F) on or before...
10% chanceOct 18
20% chanceOct 24
30% chanceOct 28
40% chanceOct 31
50% chanceNov 3
60% chanceNov 6
70% chanceNov 10
80% chanceNov 13
90% chanceNov 18

Agricultural climatic data from weather station: MC INTOSH 6 SE (USC00395381)

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