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Will it freeze in Coos Bay in the next 7 nights?
No overnight lows at or below 32°F are forecast in Coos Bay during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 42°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 42°F Above 36°F · Mostly Cloudy
- Fri, Nov 6 46°F Above 36°F · Mostly Cloudy
- Sat, Nov 7 50°F Above 36°F · Light Rain
- Sun, Nov 8 44°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 49°F Above 36°F · Chance Light Rain
- Tue, Nov 10 50°F Above 36°F · Chance Light Rain
- Wed, Nov 11 47°F Above 36°F · Light Rain Likely
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 Coos Bay
Most years have no 28°F hard freeze at North Bend Regional Airport, according to NOAA’s 1991–2020 Climate Normals. Check the short-term forecast above during cold snaps.
| 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 1 · Apr 2 · May 1 | Oct 24 · Nov 15 · Dec 11 | 224 days |
| 32°F freeze | Dec 31 · Feb 21 · Mar 25 | Nov 12 · Dec 9 · Jan 28 | 294 days |
| 28°F hard freeze | Dec 3 · Jan 4 · Feb 22 | Nov 25 · Dec 22 · Feb 15 | 365 days |
Average high temperature by month
1991–2020 normals at North Bend Regional 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 Coos Bay, OR come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: North Bend Regional Airport (station USW00024284, elevation 17 ft), 2.3 mi from Coos Bay. 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 Coos Bay
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| North Bend, OR | 1.9 mi | Feb 21 | Dec 9 |
| Florence, OR | 43 mi | Apr 10 | Nov 15 |
| Winston, OR | 45 mi | Mar 23 | Nov 18 |
| Roseburg, OR | 45 mi | Mar 23 | Nov 18 |
| Sutherlin, OR | 46 mi | Mar 31 | Nov 5 |
| Veneta, OR | 63 mi | Apr 18 | Oct 25 |
| Cottage Grove, OR | 65 mi | Apr 24 | Oct 25 |
| Creswell, OR | 71 mi | Apr 24 | Oct 25 |
| Eugene, OR | 73 mi | Apr 11 | Oct 23 |
| Junction City, OR | 77 mi | Apr 11 | Oct 23 |
Frequently asked questions
When is the last frost in Coos Bay?
On average, the last spring frost (32°F) in Coos Bay is around February 21. In about 1 year in 10 it comes after March 25, and in 9 years in 10 it comes after December 31.
When is the first frost in Coos Bay?
The first fall frost (32°F) usually arrives around December 9. There’s a 10% chance of a freeze by November 12 and a 90% chance by January 28.
Can it frost in Coos Bay 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 2.
What growing zone is Coos Bay?
Coos Bay is in USDA Plant Hardiness Zone 9a (average annual extreme minimum temperature 20 to 25°F), based on the 2023 USDA map for ZIP code 97420. See growing zones in Oregon.
More: all Oregon frost dates · Oregon growing zones · frost vs. freeze