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🍂 First Frost Dates for Lanham, Maryland 20706

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

The first 32°F light freeze date is 30% likely to be on Oct 26. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Lanham, MD 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% chanceOct 6
20% chanceOct 11
30% chanceOct 15
40% chanceOct 18
50% chanceOct 21
60% chanceOct 23
70% chanceOct 26
80% chanceOct 30
90% chanceNov 4
Probability of light freeze (32°F) on or before...
10% chanceOct 17
20% chanceOct 22
30% chanceOct 26
40% chanceOct 30
50% chanceNov 1
60% chanceNov 4
70% chanceNov 7
80% chanceNov 11
90% chanceNov 16
Probability of moderate freeze (28°F) on or before...
10% chanceOct 30
20% chanceNov 4
30% chanceNov 8
40% chanceNov 12
50% chanceNov 15
60% chanceNov 18
70% chanceNov 21
80% chanceNov 26
90% chanceDec 2
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 12
20% chanceNov 18
30% chanceNov 23
40% chanceNov 27
50% chanceDec 1
60% chanceDec 4
70% chanceDec 7
80% chanceDec 13
90% chanceDec 21
Probability of hard freeze (20°F) on or before...
10% chanceNov 28
20% chanceDec 2
30% chanceDec 7
40% chanceDec 11
50% chanceDec 16
60% chanceDec 20
70% chanceDec 24
80% chanceDec 29
90% chanceJan 6
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 8
20% chanceDec 14
30% chanceDec 20
40% chanceDec 25
50% chanceDec 29
60% chanceJan 2
70% chanceJan 8
80% chanceJan 15
90% chanceJan 24

Agricultural climatic data from weather station: COLLEGE PARK (USC00181995)

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