Sulphur weather by month
What a typical year looks like in Sulphur, Louisiana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Lake Charles Regional Airport, 17 km from Sulphur; records cover 1961–2026.
The year at a glance
- Precipitation a year
- 59.7 in1518 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 12
- First fall freeze
- Dec 1
- Heating degree days
- 1,314
- Cooling degree days
- 3,064
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 29°−2° (heating, 99%) and 98°37° (cooling, 1%).
Month by month
Sulphur in January
Highs average 63°17° and lows 43°6°, with 5.9 in150 mm of precipitation in a typical January.
- Record high
- 82°28° (1989)
- Record low
- 6°−14° (2025)
- Heating degree days
- 379
- Cooling degree days
- 14
Sulphur in February
Highs average 67°19° and lows 47°8°, with 3.3 in83 mm of precipitation in a typical February.
- Record high
- 84°29° (2026)
- Record low
- 16°−9° (2021)
- Heating degree days
- 250
- Cooling degree days
- 24
Sulphur in March
Highs average 73°23° and lows 53°12°, with 3.7 in93 mm of precipitation in a typical March.
- Record high
- 90°32° (2008)
- Record low
- 23°−5° (2002)
- Heating degree days
- 130
- Cooling degree days
- 71
Sulphur in April
Highs average 79°26° and lows 59°15°, with 4.4 in113 mm of precipitation in a typical April.
- Record high
- 95°35° (1987)
- Record low
- 34°1° (1971)
- Heating degree days
- 34
- Cooling degree days
- 159
Sulphur in May
Highs average 85°30° and lows 67°20°, with 5.4 in137 mm of precipitation in a typical May.
- Record high
- 99°37° (2005)
- Record low
- 42°6° (2013)
- Heating degree days
- 2
- Cooling degree days
- 354
Sulphur in June
Highs average 91°33° and lows 74°23°, with 6.5 in166 mm of precipitation in a typical June.
- Record high
- 103°39° (2011)
- Record low
- 56°13° (1984)
- Heating degree days
- 0
- Cooling degree days
- 513
Sulphur in July
Highs average 92°33° and lows 76°24°, with 5.7 in145 mm of precipitation in a typical July.
- Record high
- 102°39° (1980)
- Record low
- 61°16° (1967)
- Heating degree days
- 0
- Cooling degree days
- 586
Sulphur in August
Highs average 93°34° and lows 75°24°, with 6.2 in157 mm of precipitation in a typical August.
- Record high
- 109°43° (2023)
- Record low
- 59°15° (1992)
- Heating degree days
- 0
- Cooling degree days
- 587
Sulphur in September
Highs average 89°32° and lows 71°22°, with 5.2 in132 mm of precipitation in a typical September.
- Record high
- 105°41° (2000)
- Record low
- 47°8° (1967)
- Heating degree days
- 0
- Cooling degree days
- 452
Sulphur in OctoberThis month
Highs average 82°28° and lows 60°16°, with 4.8 in122 mm of precipitation in a typical October.
- Record high
- 96°36° (2019)
- Record low
- 30°−1° (1993)
- Heating degree days
- 28
- Cooling degree days
- 222
Sulphur in November
Highs average 72°22° and lows 51°10°, with 4.1 in105 mm of precipitation in a typical November.
- Record high
- 88°31° (2016)
- Record low
- 23°−5° (1976)
- Heating degree days
- 166
- Cooling degree days
- 58
Sulphur in December
Highs average 65°19° and lows 45°7°, with 4.6 in116 mm of precipitation in a typical December.
- Record high
- 82°28° (1966)
- Record low
- 11°−12° (1989)
- Heating degree days
- 325
- Cooling degree days
- 24