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Will it freeze in Woodburn in the next 7 nights?
No overnight lows at or below 32°F are forecast in Woodburn during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 39°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 39°F Above 36°F · Patchy Fog
- Fri, Nov 6 45°F Above 36°F · Chance Light Rain then Mostly Cloudy
- Sat, Nov 7 48°F Above 36°F · Light Rain
- Sun, Nov 8 39°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 46°F Above 36°F · Light Rain Likely
- Tue, Nov 10 47°F Above 36°F · Chance Light Rain
- Wed, Nov 11 44°F Above 36°F · Chance Light Rain
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 Woodburn
The median first fall hard-freeze date (28°F) is December 1, from NOAA’s 1991–2020 Climate Normals at Aurora State Airport. 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 | Mar 27 · Apr 15 · May 4 | Oct 9 · Oct 26 · Nov 14 | 193 days |
| 32°F freeze | Feb 21 · Mar 16 · Apr 7 | Oct 27 · Nov 14 · Dec 6 | 242 days |
| 28°F hard freeze | Jan 4 · Feb 15 · Mar 8 | Nov 9 · Dec 1 · Dec 30 | 292 days |
Average high temperature by month
1991–2020 normals at Aurora State Airport
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 Woodburn, OR come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Aurora State Airport (station USW00094281, elevation 196 ft), 8.3 mi from Woodburn. 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 Woodburn
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Silverton, OR | 11 mi | Mar 28 | Nov 10 |
| Canby, OR | 12 mi | Mar 18 | Nov 13 |
| Newberg, OR | 12 mi | Mar 21 | Nov 22 |
| Wilsonville, OR | 12 mi | Mar 18 | Nov 13 |
| Keizer, OR | 13 mi | Apr 3 | Nov 1 |
| Molalla, OR | 14 mi | Mar 16 | Nov 19 |
| Sherwood, OR | 15 mi | Mar 21 | Nov 22 |
| Tualatin, OR | 16 mi | Apr 1 | Nov 6 |
| McMinnville, OR | 17 mi | Apr 5 | Nov 7 |
| Salem, OR | 17 mi | Apr 3 | Nov 1 |
Frequently asked questions
When is the last frost in Woodburn?
On average, the last spring frost (32°F) in Woodburn is around March 16. In about 1 year in 10 it comes after April 7, and in 9 years in 10 it comes after February 21.
When is the first frost in Woodburn?
The first fall frost (32°F) usually arrives around November 14. There’s a 10% chance of a freeze by October 27 and a 90% chance by December 6.
Can it frost in Woodburn 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 April 15.
What growing zone is Woodburn?
Woodburn is in USDA Plant Hardiness Zone 8b (average annual extreme minimum temperature 15 to 20°F), based on the 2023 USDA map for ZIP code 97071. See growing zones in Oregon.
More: all Oregon frost dates · Oregon growing zones · UV index today in Woodburn · frost vs. freeze