Last frost date in Port Arthur, TX

Average last frost
February 14

Expect the last frost in Port Arthur around February 14. Frost after March 13 happens in only one year out of ten. The first fall frost usually arrives about December 7, which leaves 301 frost-free days. An early freeze before November 15 happens one year in ten.

Safe after (10% risk)
Mar 13
Average first frost
Dec 7
Frost-free season
301 days
Hard freeze (28°F) ends
Jan 28
Next 7 nights in Port Arthur

No frost in the next 7 nights

National Weather Service forecast, updated Oct 22, 12:57 UTC

  1. ThuOct 2264°
  2. FriOct 2368°
  3. SatOct 2466°
  4. SunOct 2566°
  5. MonOct 2665°
  6. TueOct 2765°
  7. WedOct 2865°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Feb 14First frost Dec 7301 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND301 frost-free days
Frost risk through the year at Port Arthur SE Tx Airport, 8.3 miles from Port Arthur.

Planting calendar for Port Arthur

Windows count forward or back from the average frost dates above. Click a crop for dates across Texas.

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesFeb 21–Mar 7
PumpkinsFeb 28–Mar 14
SunflowersFeb 15–Mar 8
CucumbersFeb 28–Mar 7
CornFeb 21–Mar 7
Sweet potatoesMar 7–Mar 21
WatermelonFeb 28–Mar 14
Green beansFeb 21–Mar 14
ZucchiniFeb 21–Mar 7
OkraMar 7–Mar 21
PeppersFeb 28–Mar 14
BasilFeb 21–Mar 7
Butternut squashFeb 21–Mar 7
CantaloupeFeb 28–Mar 14
EggplantFeb 28–Mar 14
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesJan 17–Jan 31
OnionsJan 3–Jan 24
CarrotsJan 24–Feb 28
LettuceJan 31–Feb 21
BroccoliJan 17–Jan 31
BeetsJan 17–Feb 28
PeasJan 3–Jan 17
CabbageJan 17–Jan 31
RadishesJan 10–Feb 21
Brussels sproutsJan 31–Feb 14
SpinachJan 3–Jan 24
CilantroJan 31–Feb 21
KaleJan 17–Jan 31
Collard greensJan 17–Jan 31
TurnipsJan 17–Jan 31
DillFeb 14–Feb 28
CeleryFeb 21–Feb 28
CauliflowerJan 31–Feb 14
LeeksJan 31–Feb 14
Swiss chardJan 31–Feb 28
ParsleyJan 31–Feb 21
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsDec 15–Jan 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesJan 17–Jan 31
AsparagusJan 17–Jan 31

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FJan 17Feb 14Mar 13Nov 15Dec 7Jan 9
Hard freeze, 28°FDec 23Jan 28Mar 3Dec 1Jan 1Feb 3

Read the spring 10% column as the date after which only one year in ten still gets frost. That is the safer date for tomatoes, peppers and basil.

Where these numbers come from

NOAA station Port Arthur SE Tx Airport (USW00012917) sits 8.3 miles from the center of Port Arthur at 16 feet. Its averages cover 1991 to 2020. Low spots, valleys and open fields can keep getting frost a week or two after the station stops; city centers and lakeshores usually get less of it.

Questions

When is the last frost in Port Arthur, TX?

The average last frost date in Port Arthur is February 14, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after March 13.

When is the first frost in Port Arthur?

The first frost in fall usually comes around December 7. One year in ten it arrives before November 15.

How long is the growing season in Port Arthur?

About 301 days between the average last and first frost.

When should I plant tomatoes in Port Arthur?

Plant tomato seedlings outside from February 21 to March 7. Start seeds indoors six to eight weeks earlier.

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