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Will it freeze in Portland in the next 7 nights?
No overnight lows at or below 32°F are forecast in Portland during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 66°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 66°F Above 36°F · Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
- Fri, Nov 6 63°F Above 36°F · Mostly Cloudy
- Sat, Nov 7 61°F Above 36°F · Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
- Sun, Nov 8 58°F Above 36°F · Chance Rain Showers
- Mon, Nov 9 58°F Above 36°F · Slight Chance Rain Showers
- Tue, Nov 10 61°F Above 36°F · Mostly Cloudy
- Wed, Nov 11 62°F Above 36°F · 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 Portland
The median first fall hard-freeze date (28°F) is January 1, from NOAA’s 1991–2020 Climate Normals at Corpus Christi NWS. 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 | Jan 18 · Feb 18 · Mar 12 | Nov 16 · Dec 7 · Jan 4 | 297 days |
| 32°F freeze | Dec 24 · Jan 31 · Mar 2 | Nov 29 · Dec 22 · Feb 1 | 331 days |
| 28°F hard freeze | Dec 13 · Jan 11 · Feb 17 | Dec 7 · Jan 1 · Feb 4 | 364 days |
Average high temperature by month
1991–2020 normals at Corpus Christi NWS
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 Portland, TX come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Corpus Christi NWS (station USC00412011, elevation 44 ft), 13 mi from Portland. 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 Portland
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Corpus Christi, TX | 7.5 mi | Jan 31 | Dec 22 |
| Ingleside, TX | 7.5 mi | rare | rare |
| Aransas Pass, TX | 14 mi | rare | rare |
| Sinton, TX | 14 mi | Feb 1 | Dec 17 |
| Rockport, TX | 21 mi | Jan 31 | Dec 25 |
| Robstown, TX | 22 mi | Jan 26 | Dec 24 |
| Kingsville, TX | 42 mi | Jan 25 | Dec 20 |
| Beeville, TX | 43 mi | Feb 17 | Dec 8 |
| Alice, TX | 46 mi | Jan 29 | Dec 29 |
| Port Lavaca, TX | 66 mi | Feb 1 | Dec 21 |
Frequently asked questions
When is the last frost in Portland?
On average, the last spring frost (32°F) in Portland is around January 31. In about 1 year in 10 it comes after March 2, and in 9 years in 10 it comes after December 24.
When is the first frost in Portland?
The first fall frost (32°F) usually arrives around December 22. There’s a 10% chance of a freeze by November 29 and a 90% chance by February 1.
Can it frost in Portland 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 February 18.
What growing zone is Portland?
Portland is in USDA Plant Hardiness Zone 10a (average annual extreme minimum temperature 30 to 35°F), based on the 2023 USDA map for ZIP code 78374. See growing zones in Texas.
More: all Texas frost dates · Texas growing zones · frost vs. freeze