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Will it freeze in Philomath in the next 7 nights?
No overnight lows at or below 32°F are forecast in Philomath during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 40°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 40°F Above 36°F · Mostly Cloudy
- Fri, Nov 6 45°F Above 36°F · Chance Light Rain then Mostly Cloudy
- Sat, Nov 7 47°F Above 36°F · Light Rain
- Sun, Nov 8 40°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 45°F Above 36°F · Chance Light Rain
- 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 Philomath
The median first fall hard-freeze date (28°F) is October 28, from NOAA’s 1991–2020 Climate Normals at Corvallis Water Bureau. 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 21 · Jun 8 · Jun 26 | Sep 3 · Sep 19 · Oct 5 | 102 days |
| 32°F freeze | Apr 28 · May 15 · Jun 2 | Sep 24 · Oct 8 · Oct 26 | 145 days |
| 28°F hard freeze | Apr 2 · Apr 25 · May 10 | Oct 9 · Oct 28 · Nov 13 | 186 days |
Average high temperature by month
1991–2020 normals at Corvallis Water Bureau
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 Philomath, OR come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Corvallis Water Bureau (station USC00351877, elevation 592 ft), 5.3 mi from Philomath. 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 Philomath
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Corvallis, OR | 4.3 mi | Apr 17 | Oct 28 |
| Albany, OR | 14 mi | Apr 17 | Oct 28 |
| Lebanon, OR | 22 mi | Mar 14 | Nov 18 |
| Monmouth, OR | 22 mi | Apr 16 | Nov 1 |
| Independence, OR | 23 mi | Apr 16 | Nov 1 |
| Junction City, OR | 24 mi | Apr 11 | Oct 23 |
| Dallas, OR | 26 mi | Apr 16 | Nov 1 |
| Salem, OR | 31 mi | Apr 3 | Nov 1 |
| Stayton, OR | 33 mi | Mar 29 | Nov 6 |
| Sweet Home, OR | 34 mi | Apr 12 | Oct 28 |
Frequently asked questions
When is the last frost in Philomath?
On average, the last spring frost (32°F) in Philomath is around May 15. In about 1 year in 10 it comes after June 2, and in 9 years in 10 it comes after April 28.
When is the first frost in Philomath?
The first fall frost (32°F) usually arrives around October 8. There’s a 10% chance of a freeze by September 24 and a 90% chance by October 26.
Can it frost in Philomath 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 8.
What growing zone is Philomath?
Philomath 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 97331. See growing zones in Oregon.
More: all Oregon frost dates · Oregon growing zones · frost vs. freeze