Port Arthur weather by month
What a typical year looks like in Port Arthur, Texas: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Port Arthur SE Tx Regional Airport, 14 km from Port Arthur; records cover 1901–2026.
The year at a glance
- Precipitation a year
- 62.1 in1578 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 3
- First fall freeze
- Dec 2
- Heating degree days
- 1,262
- Cooling degree days
- 3,076
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 30°−1° (heating, 99%) and 98°37° (cooling, 1%).
Month by month
Port Arthur in January
Highs average 64°18° and lows 44°7°, with 5.3 in135 mm of precipitation in a typical January.
- Record high
- 86°30° (1917)
- Record low
- 11°−12° (1930)
- Heating degree days
- 367
- Cooling degree days
- 15
Port Arthur in February
Highs average 67°20° and lows 48°9°, with 3.1 in78 mm of precipitation in a typical February.
- Record high
- 90°32° (1906)
- Record low
- 10°−12° (1906)
- Heating degree days
- 235
- Cooling degree days
- 26
Port Arthur in March
Highs average 73°23° and lows 53°12°, with 3.6 in92 mm of precipitation in a typical March.
- Record high
- 95°35° (1946)
- Record low
- 20°−7° (1922)
- Heating degree days
- 125
- Cooling degree days
- 72
Port Arthur in April
Highs average 79°26° and lows 60°15°, with 3.9 in100 mm of precipitation in a typical April.
- Record high
- 94°34° (1987)
- Record low
- 32°0° (1987)
- Heating degree days
- 32
- Cooling degree days
- 162
Port Arthur in May
Highs average 86°30° and lows 67°20°, with 4.7 in119 mm of precipitation in a typical May.
- Record high
- 101°38° (1905)
- Record low
- 42°6° (2013)
- Heating degree days
- 2
- Cooling degree days
- 358
Port Arthur in June
Highs average 91°33° and lows 73°23°, with 6.7 in170 mm of precipitation in a typical June.
- Record high
- 106°41° (1902)
- Record low
- 53°12° (1903)
- Heating degree days
- 0
- Cooling degree days
- 510
Port Arthur in July
Highs average 93°34° and lows 75°24°, with 6.9 in174 mm of precipitation in a typical July.
- Record high
- 108°42° (1902)
- Record low
- 61°16° (1967)
- Heating degree days
- 0
- Cooling degree days
- 577
Port Arthur in August
Highs average 93°34° and lows 74°24°, with 6.9 in175 mm of precipitation in a typical August.
- Record high
- 111°44° (2023)
- Record low
- 58°14° (1911)
- Heating degree days
- 0
- Cooling degree days
- 581
Port Arthur in September
Highs average 90°32° and lows 71°21°, with 6.7 in170 mm of precipitation in a typical September.
- Record high
- 105°41° (2000)
- Record low
- 45°7° (1967)
- Heating degree days
- 0
- Cooling degree days
- 452
Port Arthur in OctoberThis month
Highs average 82°28° and lows 61°16°, with 5.5 in139 mm of precipitation in a typical October.
- Record high
- 99°37° (1905)
- Record low
- 30°−1° (1993)
- Heating degree days
- 26
- Cooling degree days
- 231
Port Arthur in November
Highs average 72°22° and lows 52°11°, with 3.9 in99 mm of precipitation in a typical November.
- Record high
- 94°34° (1923)
- Record low
- 22°−6° (1976)
- Heating degree days
- 158
- Cooling degree days
- 65
Port Arthur in December
Highs average 66°19° and lows 46°8°, with 5 in126 mm of precipitation in a typical December.
- Record high
- 86°30° (1918)
- Record low
- 12°−11° (1989)
- Heating degree days
- 317
- Cooling degree days
- 27