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🍂 First Frost Dates for Oskaloosa, Kansas 66066

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 8. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Oskaloosa, KS 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 22
20% chanceSep 26
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 30
20% chanceOct 4
30% chanceOct 8
40% chanceOct 11
50% chanceOct 14
60% chanceOct 17
70% chanceOct 20
80% chanceOct 23
90% chanceOct 27
Probability of moderate freeze (28°F) on or before...
10% chanceOct 8
20% chanceOct 14
30% chanceOct 18
40% chanceOct 21
50% chanceOct 24
60% chanceOct 27
70% chanceOct 31
80% chanceNov 2
90% chanceNov 7
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 18
20% chanceOct 24
30% chanceOct 28
40% chanceNov 1
50% chanceNov 3
60% chanceNov 6
70% chanceNov 9
80% chanceNov 14
90% chanceNov 20
Probability of hard freeze (20°F) on or before...
10% chanceOct 28
20% chanceNov 2
30% chanceNov 6
40% chanceNov 10
50% chanceNov 13
60% chanceNov 16
70% chanceNov 21
80% chanceNov 26
90% chanceDec 1
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 5
20% chanceNov 11
30% chanceNov 15
40% chanceNov 19
50% chanceNov 24
60% chanceNov 27
70% chanceDec 1
80% chanceDec 5
90% chanceDec 11

Agricultural climatic data from weather station: OSKALOOSA 4 NE (USC00146100)

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