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Will it freeze in Pendleton in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 31°F (Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST).
Tonight: forecast low 31°F. Freeze.
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 31°F Freeze · Mostly Clear
- Fri, Nov 6 36°F Frost possible · Mostly Cloudy
- Sat, Nov 7 39°F Above 36°F · Mostly Cloudy then Slight Chance Rain Showers
- Sun, Nov 8 34°F Frost possible · Mostly Cloudy
- Mon, Nov 9 36°F Frost possible · Slight Chance Rain Showers
- Tue, Nov 10 40°F Above 36°F · Slight Chance Rain Showers
- Wed, Nov 11 39°F Above 36°F · Slight Chance Rain Showers
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 Pendleton
The median first fall hard-freeze date (28°F) is October 24, from NOAA’s 1991–2020 Climate Normals at Pendleton Dwtn. 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 24 · May 7 · May 20 | Sep 15 · Sep 29 · Oct 12 | 144 days |
| 32°F freeze | Apr 3 · Apr 22 · May 8 | Sep 27 · Oct 9 · Oct 26 | 170 days |
| 28°F hard freeze | Mar 10 · Mar 31 · Apr 21 | Oct 7 · Oct 24 · Nov 11 | 206 days |
Average high temperature by month
1991–2020 normals at Pendleton Dwtn
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 Pendleton, OR come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Pendleton Dwtn (station USC00356541, elevation 1,040 ft), 1.2 mi from Pendleton. 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 Pendleton
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Hermiston, OR | 25 mi | Apr 26 | Oct 10 |
| Milton-Freewater, OR | 27 mi | Mar 25 | Oct 29 |
| Umatilla, OR | 30 mi | Mar 30 | Nov 4 |
| College Place, WA | 32 mi | May 2 | Oct 1 |
| Walla Walla, WA | 35 mi | Mar 27 | Oct 31 |
| Kennewick, WA | 40 mi | Mar 28 | Oct 30 |
| La Grande, OR | 43 mi | May 6 | Oct 1 |
| Pasco, WA | 43 mi | Apr 27 | Oct 11 |
| Richland, WA | 48 mi | Apr 6 | Oct 24 |
| West Richland, WA | 52 mi | Apr 6 | Oct 24 |
Frequently asked questions
When is the last frost in Pendleton?
On average, the last spring frost (32°F) in Pendleton is around April 22. In about 1 year in 10 it comes after May 8, and in 9 years in 10 it comes after April 3.
When is the first frost in Pendleton?
The first fall frost (32°F) usually arrives around October 9. There’s a 10% chance of a freeze by September 27 and a 90% chance by October 26.
Can it frost in Pendleton 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 7.
What growing zone is Pendleton?
Pendleton 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 97801. See growing zones in Oregon.
More: all Oregon frost dates · Oregon growing zones · frost vs. freeze