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Monthly climate in Port Sulphur, Louisiana, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Port Sulphur features a humid subtropical climate (Cfa). Temperatures typically range between 14 °C (57 °F) and 28 °C (83 °F) through the year, but rarely can drop to 0 °C (32 °F) or can rise to as high as 32 °C (90 °F). The average annual precipitation amounts to about 1647 mm (64.8 inches) and receives 144 rainy days on the 1 mm (0.04 inches) threshold annually. Port Sulphur enjoys an average of 3311 hours of sunshine throughout the year, and daylight varies from 10 hours 16 minutes to 13 hours 59 minutes per day.

Monthly average temperatures in Port Sulphur, Louisiana, United States §

The warmest months in Port Sulphur are June, July and August, with daily mean temperatures ranging from 27 to 28 °C (81 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 14 to 16 °C (57 - 61 °F) throughout the day. On average each year, Port Sulphur experiences 139 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Port Sulphur, Louisiana, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 24°C
(75°F)		 23°C
(75°F)		 25°C
(77°F)		 26°C
(79°F)		 30°C
(86°F)		 31°C
(87°F)		 32°C
(90°F)		 31°C
(88°F)		 32°C
(90°F)		 29°C
(84°F)		 26°C
(78°F)		 23°C
(74°F)
Mean maximum 21°C
(70°F)		 21°C
(70°F)		 23°C
(74°F)		 25°C
(77°F)		 28°C
(82°F)		 29°C
(85°F)		 31°C
(89°F)		 31°C
(88°F)		 30°C
(87°F)		 28°C
(83°F)		 24°C
(75°F)		 22°C
(71°F)
Average high 16°C
(61°F)		 17°C
(63°F)		 20°C
(67°F)		 22°C
(72°F)		 26°C
(78°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(85°F)		 28°C
(83°F)		 25°C
(78°F)		 20°C
(68°F)		 18°C
(64°F)
Daily mean 14°C
(57°F)		 16°C
(61°F)		 18°C
(65°F)		 21°C
(70°F)		 25°C
(77°F)		 27°C
(81°F)		 28°C
(83°F)		 28°C
(83°F)		 27°C
(81°F)		 24°C
(76°F)		 19°C
(66°F)		 16°C
(61°F)
Average low 12°C
(54°F)		 14°C
(58°F)		 17°C
(63°F)		 20°C
(68°F)		 24°C
(75°F)		 26°C
(80°F)		 27°C
(81°F)		 27°C
(81°F)		 26°C
(80°F)		 23°C
(74°F)		 17°C
(64°F)		 14°C
(58°F)
Mean minimum 4°C
(40°F)		 7°C
(46°F)		 9°C
(49°F)		 14°C
(58°F)		 20°C
(68°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 23°C
(74°F)		 15°C
(60°F)		 11°C
(52°F)		 8°C
(46°F)
Minimum -0°C
(32°F)		 0°C
(33°F)		 6°C
(42°F)		 12°C
(53°F)		 17°C
(62°F)		 24°C
(75°F)		 25°C
(76°F)		 24°C
(76°F)		 21°C
(70°F)		 12°C
(54°F)		 7°C
(45°F)		 6°C
(43°F)

Compare climate in Port Sulphur with other places

Compare temperature, precipitation, sunshine, UV index in Port Sulphur, Louisiana, United States with other places around the world.

Monthly average precipitation in Port Sulphur, Louisiana, United States §

Port Sulphur usually has the most precipitation in June, July and August, with an average of 18 rainy days and 235 mm (9.2 inches) of precipitation per month. The driest months in Port Sulphur are February, March and November. On average, 71 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Port Sulphur, Louisiana, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 106 (4.2) 91 (3.6) 69 (2.7) 107 (4.2) 119 (4.7) 195 (7.7) 238 (9.4) 272 (10.7) 162 (6.4) 124 (4.9) 52 (2.1) 113 (4.4)
Average precipitation days (≥ 1 mm) 8 11 8 9 10 14 20 21 14 12 6 11

Monthly sunshine hours in Port Sulphur, Louisiana, United States §

The sunniest months in Port Sulphur are May, July and August, when the sun shines an average of 10 hours 19 minutes a day. Least sunny months in Port Sulphur: January, February and December receive an average of 6 hours 54 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Port Sulphur, Louisiana, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 187 214 284 291 331 305 314 314 281 294 263 226
Mean daily daylight hours 10h 29m 11h 8m 12h 0m 12h 53m 13h 37m 13h 59m 13h 47m 13h 8m 12h 17m 11h 24m 10h 39m 10h 16m

Solar UV radiation in Port Sulphur, Louisiana, United States §

Port Sulphur experiences the highest level of ultraviolet (UV) radiation in April, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Port Sulphur UV Index data.

Average daily maximum UV levels by month for Port Sulphur, Louisiana, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 5 8 9 11 11 11 12 12 11 9 6 5

Detailed Monthly Weather Insights for Port Sulphur, Louisiana, United States

Discover in-depth weather details for every month in Port Sulphur. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Port Sulphur's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.