🌷 Your Ultimate Garden Calendar!

🌷 Last Frost Dates for San Marcos, Texas 78666

The last 36°F Spring frost date is 30% likely to be on Mar 23. (See detailed probabilities below.)

The last 32°F light freeze date is 30% likely to be on Mar 11. (See detailed probabilities below.)

(See also 🍂 First Fall Frost Dates.)

Last frost date probabilities for San Marcos, TX 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 Last Frost Date?

The last spring frost signals when your area is safe from freezing temperatures. Tender plants can now grow outdoors without cold damage! This marks the beginning of the growing season. Last spring frost serves as your essential starting point for planting warm-season crops. It's also time to remove winter protection from your perennials. Enjoy the longer days and warmer weather!

How to use the Last Frost Date?

Start seeds indoors several weeks before your last frost date. This gives plants time to reach transplanting size when weather permits. Plan your outdoor planting schedule around your area's average last frost date. Plant some crops before and some after this date to protect against weather changes. Look for spots in your yard where frost stays longer or disappears earlier. Create your own frost map to use all available growing space and extend your season. Keep watching your local weather forecast to catch any surprise late frosts.

Last Frost Date Probabilities

Probability of frost (36°F) on or after…
10% chanceApr 4
20% chanceMar 29
30% chanceMar 23
40% chanceMar 19
50% chanceMar 15
60% chanceMar 11
70% chanceMar 7
80% chanceMar 2
90% chanceFeb 24
Probability of light freeze (32°F) on or after…
10% chanceMar 23
20% chanceMar 16
30% chanceMar 11
40% chanceMar 7
50% chanceMar 2
60% chanceFeb 27
70% chanceFeb 21
80% chanceFeb 15
90% chanceFeb 4
Probability of moderate freeze (28°F) on or after…
10% chanceMar 11
20% chanceMar 4
30% chanceFeb 27
40% chanceFeb 20
50% chanceFeb 14
60% chanceFeb 7
70% chanceFeb 1
80% chanceJan 25
90% chanceJan 11
Probability of moderate hard freeze (24°F) on or after…
10% chanceMar 1
20% chanceFeb 16
30% chanceFeb 8
40% chanceFeb 2
50% chanceJan 26
60% chanceJan 20
70% chanceJan 10
80% chanceJan 1
90% chanceDec 24
Probability of hard freeze (20°F) on or after…
10% chanceFeb 13
20% chanceFeb 2
30% chanceJan 25
40% chanceJan 17
50% chanceJan 7
60% chanceJan 2
70% chanceDec 30
80% chanceDec 25
90% chanceDec 17
Probability of severe hard freeze (16°F) on or after…
10% chanceFeb 1
20% chanceJan 18
30% chanceJan 9
40% chanceJan 4
50% chanceDec 31
60% chanceDec 29
70% chanceDec 26
80% chanceDec 19
90% chanceDec 13

Agricultural climatic data from weather station: AUSTIN SAN ANTONIO (USW00012971)

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