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🌷 Last Frost Dates for Palouse, Washington 99161

A 36°F frost is always a risk here. (See detailed probabilities below.)

The last 32°F light freeze date is 30% likely to be on May 16. (See detailed probabilities below.)

(See also 🍂 First Fall Frost Dates.)

Last frost date probabilities for Palouse, 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% chancealways
20% chancealways
30% chancealways
40% chancealways
50% chancealways
60% chancealways
70% chancealways
80% chancealways
90% chancealways
Probability of light freeze (32°F) on or after…
10% chanceMay 27
20% chanceMay 20
30% chanceMay 16
40% chanceMay 13
50% chanceMay 10
60% chanceMay 6
70% chanceMay 3
80% chanceApr 30
90% chanceApr 24
Probability of moderate freeze (28°F) on or after…
10% chanceMay 10
20% chanceMay 3
30% chanceApr 30
40% chanceApr 25
50% chanceApr 21
60% chanceApr 16
70% chanceApr 10
80% chanceApr 3
90% chanceMar 27
Probability of moderate hard freeze (24°F) on or after…
10% chanceApr 19
20% chanceApr 8
30% chanceApr 2
40% chanceMar 28
50% chanceMar 22
60% chanceMar 15
70% chanceMar 9
80% chanceMar 4
90% chanceFeb 24
Probability of hard freeze (20°F) on or after…
10% chanceMar 21
20% chanceMar 13
30% chanceMar 7
40% chanceMar 3
50% chanceFeb 28
60% chanceFeb 22
70% chanceFeb 17
80% chanceFeb 11
90% chanceFeb 2
Probability of severe hard freeze (16°F) on or after…
10% chanceMar 8
20% chanceMar 2
30% chanceFeb 25
40% chanceFeb 19
50% chanceFeb 14
60% chanceFeb 8
70% chanceFeb 2
80% chanceJan 26
90% chanceJan 12

Agricultural climatic data from weather station: PULLMAN 2 NW (USC00456789)

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