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Will it freeze in Sweet Home in the next 7 nights?
No overnight lows at or below 32°F are forecast in Sweet Home during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 38°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 38°F Above 36°F · Partly Cloudy
- Fri, Nov 6 42°F Above 36°F · Slight Chance Light Rain then Mostly Cloudy
- Sat, Nov 7 45°F Above 36°F · Light Rain
- Sun, Nov 8 39°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 44°F Above 36°F · Chance Light Rain
- Tue, Nov 10 45°F Above 36°F · Chance Light Rain
- Wed, Nov 11 43°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 Sweet Home
The median first fall hard-freeze date (28°F) is November 18, from NOAA’s 1991–2020 Climate Normals at Foster Dam. 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 17 · May 6 · May 25 | Sep 14 · Oct 6 · Oct 27 | 153 days |
| 32°F freeze | Mar 16 · Apr 12 · May 5 | Oct 5 · Oct 28 · Nov 21 | 197 days |
| 28°F hard freeze | Feb 12 · Mar 9 · Apr 11 | Oct 25 · Nov 18 · Dec 16 | 252 days |
Average high temperature by month
1991–2020 normals at Foster Dam
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 Sweet Home, OR come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Foster Dam (station USC00353047, elevation 550 ft), 1.6 mi from Sweet Home. 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 Sweet Home
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Lebanon, OR | 14 mi | Mar 14 | Nov 18 |
| Albany, OR | 25 mi | Apr 17 | Oct 28 |
| Springfield, OR | 28 mi | Apr 11 | Oct 23 |
| Junction City, OR | 28 mi | Apr 11 | Oct 23 |
| Stayton, OR | 28 mi | Mar 29 | Nov 6 |
| Corvallis, OR | 30 mi | Apr 17 | Oct 28 |
| Eugene, OR | 32 mi | Apr 11 | Oct 23 |
| Philomath, OR | 34 mi | May 15 | Oct 8 |
| Creswell, OR | 37 mi | Apr 24 | Oct 25 |
| Salem, OR | 39 mi | Apr 3 | Nov 1 |
Frequently asked questions
When is the last frost in Sweet Home?
On average, the last spring frost (32°F) in Sweet Home is around April 12. In about 1 year in 10 it comes after May 5, and in 9 years in 10 it comes after March 16.
When is the first frost in Sweet Home?
The first fall frost (32°F) usually arrives around October 28. There’s a 10% chance of a freeze by October 5 and a 90% chance by November 21.
Can it frost in Sweet Home 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 Sweet Home?
Sweet Home 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 97386. See growing zones in Oregon.
More: all Oregon frost dates · Oregon growing zones · frost vs. freeze