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Will it freeze in Port Arthur in the next 7 nights?
No overnight lows at or below 32°F are forecast in Port Arthur 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 · Mostly Clear
- Fri, Nov 6 66°F Above 36°F · Partly Cloudy
- Sat, Nov 7 60°F Above 36°F · Mostly Cloudy
- Sun, Nov 8 56°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 57°F Above 36°F · Partly Cloudy then Slight Chance Rain Showers
- Tue, Nov 10 58°F Above 36°F · Partly Cloudy then Slight Chance Rain Showers
- Wed, Nov 11 60°F Above 36°F · Partly 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 Port Arthur
The median first fall hard-freeze date (28°F) is January 1, from NOAA’s 1991–2020 Climate Normals at Port Arthur SE Tx 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 | Feb 5 · Mar 4 · Mar 27 | Nov 3 · Nov 23 · Dec 12 | 264 days |
| 32°F freeze | Jan 17 · Feb 14 · Mar 13 | Nov 15 · Dec 7 · Jan 9 | 301 days |
| 28°F hard freeze | Dec 23 · Jan 28 · Mar 3 | Dec 1 · Jan 1 · Feb 3 | 338 days |
Average high temperature by month
1991–2020 normals at Port Arthur SE Tx 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 Port Arthur, TX come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Port Arthur SE Tx Airport (station USW00012917, elevation 16 ft), 8.3 mi from Port Arthur. 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 Port Arthur
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Groves, TX | 3.7 mi | Feb 14 | Dec 7 |
| Port Neches, TX | 5.6 mi | Feb 14 | Dec 7 |
| Nederland, TX | 8.1 mi | Feb 14 | Dec 7 |
| Bridge City, TX | 9.3 mi | Feb 14 | Dec 7 |
| Vidor, TX | 17 mi | Feb 14 | Dec 4 |
| Orange, TX | 17 mi | Feb 28 | Nov 23 |
| Beaumont, TX | 20 mi | Feb 14 | Dec 4 |
| Lumberton, TX | 31 mi | Feb 25 | Nov 30 |
| Silsbee, TX | 35 mi | Feb 25 | Nov 30 |
| Sulphur, LA | 39 mi | Feb 14 | Dec 7 |
Frequently asked questions
When is the last frost in Port Arthur?
On average, the last spring frost (32°F) in Port Arthur is around February 14. In about 1 year in 10 it comes after March 13, and in 9 years in 10 it comes after January 17.
When is the first frost in Port Arthur?
The first fall frost (32°F) usually arrives around December 7. There’s a 10% chance of a freeze by November 15 and a 90% chance by January 9.
Can it frost in Port Arthur 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 March 4.
What growing zone is Port Arthur?
Port Arthur is in USDA Plant Hardiness Zone 9b (average annual extreme minimum temperature 25 to 30°F), based on the 2023 USDA map for ZIP code 77640. See growing zones in Texas.
More: all Texas frost dates · Texas growing zones · UV index today in Port Arthur · frost vs. freeze