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🍂 First Frost Dates for Fort Supply, Oklahoma 73841

The first 36°F frost date is 30% likely to be on Sep 29. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 6. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Fort Supply, OK 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 21
20% chanceSep 25
30% chanceSep 29
40% chanceOct 1
50% chanceOct 4
60% chanceOct 7
70% chanceOct 10
80% chanceOct 13
90% chanceOct 17
Probability of light freeze (32°F) on or before...
10% chanceSep 28
20% chanceOct 3
30% chanceOct 6
40% chanceOct 10
50% chanceOct 13
60% chanceOct 16
70% chanceOct 19
80% chanceOct 22
90% chanceOct 27
Probability of moderate freeze (28°F) on or before...
10% chanceOct 6
20% chanceOct 13
30% chanceOct 17
40% chanceOct 21
50% chanceOct 23
60% chanceOct 26
70% chanceOct 29
80% chanceNov 1
90% chanceNov 5
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 18
20% chanceOct 24
30% chanceOct 27
40% chanceOct 30
50% chanceNov 1
60% chanceNov 4
70% chanceNov 6
80% chanceNov 10
90% chanceNov 15
Probability of hard freeze (20°F) on or before...
10% chanceOct 27
20% chanceNov 1
30% chanceNov 3
40% chanceNov 6
50% chanceNov 9
60% chanceNov 12
70% chanceNov 16
80% chanceNov 20
90% chanceNov 25
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 1
20% chanceNov 7
30% chanceNov 11
40% chanceNov 15
50% chanceNov 18
60% chanceNov 22
70% chanceNov 26
80% chanceDec 1
90% chanceDec 6

Agricultural climatic data from weather station: FORT SUPPLY 3SE (USC00343304)

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