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Will it freeze in Toppenish in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Sun, Nov 8: 32°F (Sun, Nov 8, 6:00 PM PST to Mon, Nov 9, 6:00 AM PST).
Tonight: forecast low 33°F. Frost possible.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
4 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 33°F Frost possible · Areas Of Fog
- Fri, Nov 6 36°F Frost possible · Chance Rain Showers then Areas Of Fog
- Sat, Nov 7 39°F Above 36°F · Patchy Fog
- Sun, Nov 8 32°F Freeze · Mostly Cloudy
- Mon, Nov 9 34°F Frost possible · Chance Rain Showers
- Tue, Nov 10 38°F Above 36°F · Chance Rain Showers
- Wed, Nov 11 38°F Above 36°F · Mostly Cloudy
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Toppenish
The median first fall hard-freeze date (28°F) is October 26, from NOAA’s 1991–2020 Climate Normals at Wapato. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Apr 22 · May 6 · May 25 | Sep 25 · Oct 5 · Oct 16 | 150 days |
| 32°F freeze | Apr 1 · Apr 21 · May 7 | Oct 4 · Oct 15 · Oct 27 | 176 days |
| 28°F hard freeze | Mar 10 · Mar 31 · Apr 21 | Oct 13 · Oct 26 · Nov 9 | 210 days |
Average high temperature by month
1991–2020 normals at Wapato
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Toppenish, WA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Wapato (station USC00458959, elevation 841 ft), 6.4 mi from Toppenish. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Toppenish
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Union Gap, WA | 15 mi | May 8 | Oct 4 |
| Sunnyside, WA | 16 mi | May 1 | Oct 6 |
| Yakima, WA | 19 mi | Apr 8 | Oct 23 |
| Selah, WA | 21 mi | May 5 | Oct 4 |
| Grandview, WA | 21 mi | May 1 | Oct 6 |
| Prosser, WA | 29 mi | Apr 14 | Oct 22 |
| Ellensburg, WA | 44 mi | May 8 | Oct 2 |
| West Richland, WA | 44 mi | Apr 6 | Oct 24 |
| Richland, WA | 49 mi | Apr 6 | Oct 24 |
| Kennewick, WA | 56 mi | Mar 28 | Oct 30 |
Frequently asked questions
When is the last frost in Toppenish?
On average, the last spring frost (32°F) in Toppenish is around April 21. In about 1 year in 10 it comes after May 7, and in 9 years in 10 it comes after April 1.
When is the first frost in Toppenish?
The first fall frost (32°F) usually arrives around October 15. There’s a 10% chance of a freeze by October 4 and a 90% chance by October 27.
Can it frost in Toppenish after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after May 6.
What growing zone is Toppenish?
Toppenish is in USDA Plant Hardiness Zone 7a (average annual extreme minimum temperature 0 to 5°F), based on the 2023 USDA map for ZIP code 98921. See growing zones in Washington.
More: all Washington frost dates · Washington growing zones · frost vs. freeze