🍂 2026 First Frost Dates for Glenwood, Washington 98619
A 36°F frost is always a risk here. (See detailed probabilities below.)
A 32°F light freeze is always a risk here. (See detailed probabilities below.)
(See also 🌷 Last Spring Frost Dates.)
First frost date probabilities for Glenwood, 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 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% chance | always |
| 20% chance | always |
| 30% chance | always |
| 40% chance | always |
| 50% chance | always |
| 60% chance | always |
| 70% chance | always |
| 80% chance | always |
| 90% chance | always |
| Probability of light freeze (32°F) on or before... | |
|---|---|
| 10% chance | always |
| 20% chance | always |
| 30% chance | always |
| 40% chance | always |
| 50% chance | always |
| 60% chance | always |
| 70% chance | always |
| 80% chance | always |
| 90% chance | always |
| Probability of moderate freeze (28°F) on or before... | |
|---|---|
| 10% chance | Aug 28 |
| 20% chance | Sep 4 |
| 30% chance | Sep 8 |
| 40% chance | Sep 12 |
| 50% chance | Sep 16 |
| 60% chance | Sep 21 |
| 70% chance | Sep 26 |
| 80% chance | Sep 30 |
| 90% chance | Oct 4 |
| Probability of moderate hard freeze (24°F) on or before... | |
|---|---|
| 10% chance | Sep 10 |
| 20% chance | Sep 19 |
| 30% chance | Sep 26 |
| 40% chance | Sep 30 |
| 50% chance | Oct 2 |
| 60% chance | Oct 5 |
| 70% chance | Oct 9 |
| 80% chance | Oct 14 |
| 90% chance | Oct 20 |
| Probability of hard freeze (20°F) on or before... | |
|---|---|
| 10% chance | Oct 1 |
| 20% chance | Oct 5 |
| 30% chance | Oct 9 |
| 40% chance | Oct 15 |
| 50% chance | Oct 19 |
| 60% chance | Oct 23 |
| 70% chance | Oct 28 |
| 80% chance | Nov 1 |
| 90% chance | Nov 14 |
| Probability of severe hard freeze (16°F) on or before... | |
|---|---|
| 10% chance | Oct 15 |
| 20% chance | Oct 21 |
| 30% chance | Oct 28 |
| 40% chance | Nov 1 |
| 50% chance | Nov 6 |
| 60% chance | Nov 13 |
| 70% chance | Nov 23 |
| 80% chance | Dec 1 |
| 90% chance | Dec 11 |
Agricultural climatic data from weather station: GLENWOOD #2 (USC00453184:frost)