🌷 Your Ultimate Garden Calendar!

🌷 Last Frost Dates for Rosemead, California 91770

The last 36°F Spring frost date is 30% likely to be on Feb 6. (See detailed probabilities below.)

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

(See also 🍂 First Fall Frost Dates.)

Last frost date probabilities for Rosemead, CA 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% chanceFeb 28
20% chanceFeb 16
30% chanceFeb 6
40% chanceFeb 1
50% chanceJan 25
60% chanceJan 17
70% chanceJan 10
80% chanceJan 2
90% chanceDec 24
Probability of light freeze (32°F) on or after…
10% chanceFeb 10
20% chanceFeb 1
30% chanceJan 22
40% chanceJan 13
50% chanceJan 7
60% chanceJan 3
70% chanceDec 31
80% chanceDec 26
90% chanceDec 16
Probability of moderate freeze (28°F) on or after…
10% chancerarely
20% chancerarely
30% chancerarely
40% chancerarely
50% chancerarely
60% chancerarely
70% chancerarely
80% chancerarely
90% chancerarely
Probability of moderate hard freeze (24°F) on or after…
10% chancerarely
20% chancerarely
30% chancerarely
40% chancerarely
50% chancerarely
60% chancerarely
70% chancerarely
80% chancerarely
90% chancerarely
Probability of hard freeze (20°F) on or after…
10% chancerarely
20% chancerarely
30% chancerarely
40% chancerarely
50% chancerarely
60% chancerarely
70% chancerarely
80% chancerarely
90% chancerarely
Probability of severe hard freeze (16°F) on or after…
10% chancerarely
20% chancerarely
30% chancerarely
40% chancerarely
50% chancerarely
60% chancerarely
70% chancerarely
80% chancerarely
90% chancerarely

Agricultural climatic data from weather station: SAN GABRIEL FIRE DEPT (USC00047785)

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