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🍂 First Frost Dates for Chevy Chase, Maryland 20815

The first 36°F frost date is 30% likely to be on Oct 11. (See detailed probabilities below.)

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

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Chevy Chase, 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 4
20% chanceOct 8
30% chanceOct 11
40% chanceOct 15
50% chanceOct 18
60% chanceOct 21
70% chanceOct 24
80% chanceOct 28
90% chanceNov 2
Probability of light freeze (32°F) on or before...
10% chanceOct 13
20% chanceOct 18
30% chanceOct 22
40% chanceOct 26
50% chanceOct 29
60% chanceNov 1
70% chanceNov 3
80% chanceNov 7
90% chanceNov 12
Probability of moderate freeze (28°F) on or before...
10% chanceOct 24
20% chanceOct 30
30% chanceNov 2
40% chanceNov 5
50% chanceNov 9
60% chanceNov 12
70% chanceNov 16
80% chanceNov 21
90% chanceNov 28
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 5
20% chanceNov 11
30% chanceNov 16
40% chanceNov 20
50% chanceNov 24
60% chanceNov 29
70% chanceDec 1
80% chanceDec 5
90% chanceDec 12
Probability of hard freeze (20°F) on or before...
10% chanceNov 17
20% chanceNov 25
30% chanceDec 1
40% chanceDec 3
50% chanceDec 6
60% chanceDec 10
70% chanceDec 15
80% chanceDec 20
90% chanceDec 27
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 1
20% chanceDec 7
30% chanceDec 11
40% chanceDec 16
50% chanceDec 21
60% chanceDec 25
70% chanceDec 29
80% chanceJan 4
90% chanceJan 15

Agricultural climatic data from weather station: DALECARLIA RSVR (USC00182325)

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