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Will it freeze in Prineville in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 30°F (Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST).
Tonight: forecast low 30°F. Freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
5 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 30°F Freeze · Partly Cloudy
- Fri, Nov 6 32°F Freeze · Mostly Cloudy
- Sat, Nov 7 37°F Above 36°F · Mostly Cloudy
- Sun, Nov 8 30°F Freeze · Mostly Cloudy
- Mon, Nov 9 35°F Frost possible · Mostly Cloudy then Slight Chance Rain Showers
- Tue, Nov 10 37°F Above 36°F · Slight Chance Rain Showers
- Wed, Nov 11 36°F Frost possible · Slight Chance Rain Showers then 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 Prineville
The median first fall hard-freeze date (28°F) is October 8, from NOAA’s 1991–2020 Climate Normals at Prineville. 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 | May 31 · Jun 19 · Jul 8 | Aug 15 · Sep 4 · Sep 23 | 77 days |
| 32°F freeze | May 8 · Jun 1 · Jun 22 | Aug 31 · Sep 22 · Oct 9 | 113 days |
| 28°F hard freeze | Apr 19 · May 5 · Jun 1 | Sep 18 · Oct 8 · Oct 27 | 153 days |
Average high temperature by month
1991–2020 normals at Prineville
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 Prineville, OR come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Prineville (station USC00356883, elevation 2,876 ft), 1.0 mi from Prineville. 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 Prineville
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Redmond, OR | 16 mi | Jun 9 | Sep 14 |
| Bend, OR | 28 mi | Jun 6 | Sep 20 |
| Madras, OR | 29 mi | May 19 | Oct 4 |
| The Dalles, OR | 91 mi | Apr 11 | Oct 26 |
| Sweet Home, OR | 91 mi | Apr 12 | Oct 28 |
| Estacada, OR | 100 mi | Mar 27 | Nov 14 |
| Stayton, OR | 102 mi | Mar 29 | Nov 6 |
| Lebanon, OR | 103 mi | Mar 14 | Nov 18 |
| Sandy, OR | 103 mi | Mar 27 | Nov 18 |
| Hood River, OR | 103 mi | Apr 20 | Oct 13 |
Frequently asked questions
When is the last frost in Prineville?
On average, the last spring frost (32°F) in Prineville is around June 1. In about 1 year in 10 it comes after June 22, and in 9 years in 10 it comes after May 8.
When is the first frost in Prineville?
The first fall frost (32°F) usually arrives around September 22. There’s a 10% chance of a freeze by August 31 and a 90% chance by October 9.
Can it frost in Prineville 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 June 19.
What growing zone is Prineville?
Prineville is in USDA Plant Hardiness Zone 6b (average annual extreme minimum temperature −5 to 0°F), based on the 2023 USDA map for ZIP code 97753. See growing zones in Oregon.
More: all Oregon frost dates · Oregon growing zones · frost vs. freeze