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🌷 Last Frost Dates for Soap Lake, Washington 98851

The last 36°F Spring frost date is 30% likely to be on May 16. (See detailed probabilities below.)

The last 32°F light freeze date is 30% likely to be on May 3. (See detailed probabilities below.)

(See also 🍂 First Fall Frost Dates.)

Last frost date probabilities for Soap Lake, WA 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% chanceMay 25
20% chanceMay 20
30% chanceMay 16
40% chanceMay 12
50% chanceMay 9
60% chanceMay 6
70% chanceMay 3
80% chanceApr 30
90% chanceApr 26
Probability of light freeze (32°F) on or after…
10% chanceMay 12
20% chanceMay 7
30% chanceMay 3
40% chanceApr 30
50% chanceApr 28
60% chanceApr 24
70% chanceApr 21
80% chanceApr 16
90% chanceApr 10
Probability of moderate freeze (28°F) on or after…
10% chanceApr 29
20% chanceApr 24
30% chanceApr 19
40% chanceApr 14
50% chanceApr 10
60% chanceApr 6
70% chanceApr 1
80% chanceMar 28
90% chanceMar 21
Probability of moderate hard freeze (24°F) on or after…
10% chanceApr 14
20% chanceApr 5
30% chanceMar 31
40% chanceMar 26
50% chanceMar 19
60% chanceMar 13
70% chanceMar 7
80% chanceMar 2
90% chanceFeb 24
Probability of hard freeze (20°F) on or after…
10% chanceMar 22
20% chanceMar 11
30% chanceMar 5
40% chanceMar 1
50% chanceFeb 26
60% chanceFeb 21
70% chanceFeb 16
80% chanceFeb 11
90% chanceFeb 5
Probability of severe hard freeze (16°F) on or after…
10% chanceMar 3
20% chanceFeb 26
30% chanceFeb 20
40% chanceFeb 16
50% chanceFeb 12
60% chanceFeb 8
70% chanceFeb 4
80% chanceJan 31
90% chanceJan 20

Agricultural climatic data from weather station: EPHRATA MUNI AP (USW00024141)

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