Climate and monthly weather forecastSulphur, LA
Climate and monthly weather forecast
The climate of Sulphur
The town of Sulphur, Louisiana boasts a Humid Subtropical Climate, also known as Cfa in the Köppen climate classification. Nestled within this climatic zone, there is no discernible dry season, and rainfall remains relatively heavy all year round. Throughout the year, temperatures fluctuate from a low of 44.2°F (6.8°C) in the coldest month to a high of 91.9°F (33.3°C) during the hottest months. The humidity remains fairly constant throughout the year, hovering at about 75%.Rainfall spans from 2.36" (60mm) on the lower end to a high of 3.9" (99mm). The number of days with rainfall varies month by month, reaching a peak of 17.7 days and dropping to a lowest point of 9.9 days. Snowfall is virtually absent throughout the year, with only a negligible 0.12" (3mm) occurring during the entire year.
The amount of sunlight also varies across the calendar. There are shorter daylight hours in winter, around 10.2 hours in the shortest month, extending to approximately 14.1 hours in the heart of summer. Correspondingly, sunshine hours range from 5 hours to a high of 10.6 hours. Cloud cover varies as well throughout the year, with the clearest months at 26% coverage and the cloudiest ones with 50% coverage.
Interestingly, the wind speed hovers between 5.9mph (9.5km/h) and 8.9mph (14.3km/h), with maximum wind speeds reaching up to 9.6mph (15.4km/h). Wind gusts can reach a peak of 13.9mph (22.4km/h).
The best time to visit Sulphur
Choosing the optimal time to visit Sulphur brings a host of factors into consideration. For travelers who prefer warm weather, the summer season is highly recommended, particularly July and August when temperatures ascend to the high 80s and low 90s°F with 14.1 hours of daylight and long hours of sunshine.The worst time to visit Sulphur
For those who prefer cooler weather, winter, namely January and February, may seem less than appealing. Temperatures dwindle down to lows of 44.2°F (6.8°C) during these months, and the daylight hours plummet to around 10.2 hours with minimal sunshine hours.Spring weather in Sulphur
Spring heralds in a time of rejuvenation in Sulphur, with temperatures climbing from 59.2°F (15.1°C) in March to 78.3°F (25.7°C) in May. Rainfall ranges between 1.81" (46mm) to 2.52" (64mm), and the number of rainy days increases from 13.1 to 12.4. It has relatively high UV index reaching from 5 in March to 7 in May, therefore sun protection measures are advisable.Summer weather in Sulphur
Summer in Sulphur brings high temperatures from 84.6°F (29.2°C) in June to a peak of 91.9°F (33.3°C) in August. These months, despite the hotter temperatures, boast prolonged daylight hours ranging from 14.1 hours in June to 13.2 hours by August. Sun protection is essential during these months due to substantially high UV index of 7 throughout the season.Autumn weather in Sulphur
Transitioning into autumn witnesses temperatures dropping from 87.6°F (30.9°C) in September to 68.9°F (20.5°C) by November. Rainfall rises to approximately 2.64" (67mm) by October. Initially, sunshine hours decrease to 9.7 hours in September and drop further to 5.8 hours by November. Cloud cover increases, particularly in November, coalescing to a significant 36%.Winter weather in Sulphur
Winter in Sulphur brings moderated temperatures, from 61.7°F (16.5°C) in December falling to 44.2°F (6.8°C) by February. During the colder months, daylight remains at a consistent 10.2 hours and sunshine hours sink to around 5 hours. Rainfall registers approximately 2.48" (63mm) in December and drops down to 2.36" (60mm) by February. During this season, cloud cover peaks at 46% in December, making it the cloudiest month in the town of Sulphur, Louisiana.Weather in January
January ushers in the new year with appreciable temperatures, from 44.2°F (6.8°C) to 59.2°F (15.1°C) in Sulphur, Louisiana. The chilly start of the year is characterized by a relative humidity of 78%, thus keeping the air slightly moist. Weather in January »Weather in February
Despite the leap from January, February’s climate still bags the winter attributes, albeit with marginally warmer temperatures. The Northeast winds blow at an average of 8.4mph (13.5km/h), producing a breezy, yet comfortable atmosphere for outdoor activities. Weather in February »Weather in March
The gateway to spring, March, is significantly warmer and invites more sunshine into Sulphur, Louisiana, as the days get longer. The whispers of spring can be felt in the increasingly prevalent wind, blowing at speeds occasionally reaching 13.2mph (21.2km/h). Weather in March »Weather in April
As the heart of spring, April pushes the mercury up to 78.3°F (25.7°C) making it a warm yet pleasant month. The extra sunshine of about 9.2 hours per day drives the walkers and cyclists onto the streets. Unlike March, the wind speed decreases, providing a much more comfortable environment for outdoor pursuits. Weather in April »Weather in May
A precursor to summer, May, transports people closer to the heart of the heat. It witnesses an increase in both daylight hours and temperatures, painting a typical summer picture. The beautifully clear skies of Sulphur are a testament to the 31% cloud coverage that the month boasts. Weather in May »Weather in June
June introduces the intense summer season with temperatures soaring up to 90°F (32.2°C) and above. The relative humidity remains consistently above 75%, contributing to the sweltering heat of the season. Although rain showers are more prevalent, they offer minimal respite as the temperature remains mostly unaffected. Weather in June »Weather in July
In July, Sulphur, Louisiana settles into the depths of summer, with the thermostat reading a toasty 91.2°F (32.9°C). The month is characterized by the longest and warmest days, a telltale sign of peak summer. The relentless heat, coupled with a high humidity of 76% and negligible wind, calls for keeping air conditioners in full swing. Weather in July »Weather in August
August, remaining true to the summer spirit, continues to bring intense heat to Sulphur, Louisiana. As the mercury reaches the annual peak at 91.9°F (33.3°C), any hopes of respite from the heat are quashed. The days are filled with maximum sunshine hours, complementing the warm temperatures. Weather in August »Weather in September
The advent of September marks a mild decrease in temperature, hinting at the approaching season change. The weather promises the arrival of fall, as the persistent heat begins to fade away. However, the decrease in temperature to 87.6°F (30.9°C) is only modest and the air remains warm overall. Weather in September »Weather in October
October brings the much-awaited fall season to Sulphur, Louisiana, as temperatures drop further. With the clouds covering 26% of the sky, the sunshine is still visible yet mild and enjoyable. The temperatures continue their downward trend, offering a welcomed break from the preceding hot months. Weather in October »Weather in November
As November arrives, so does a significant drop in temperature, with visible changes in the environment and foliage. Trees shed leaves and the landscape takes on a distinctly autumnal hue, painting a picturesque fall scene. The drop in temperature to 68.9°F (20.5°C) matches the overcast skies and shorter daylight hours, all signs of the approaching winter. Weather in November »Weather in December
In December, winter makes its presence known in Sulphur, Louisiana, as temperatures dip down to 61.7°F (16.5°C). With the shortest daylight hours of the year, the surroundings take on a decidedly wintery appeal. The cooling temperatures and increased chance of rainfall creates a holiday-like atmosphere around the city. Weather in December »Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Sulphur experiences its average lowest temperatures in January, reaching a peak of 59.2°F (15.1°C) and a minimum of 44.2°F (6.8°C).
Throughout the year, there are 160.8 rainfall days, and 28.54" (725mm) of precipitation is accumulated.
The only month with snowfall is January.
The month with the most snowfall is January, when snow falls for 0.2 days and typically aggregates up to 0.12" (3mm) of snow.
In Sulphur, during the entire year, snow falls for 0.2 days and aggregates up to 0.12" (3mm) of snow.
February is the most humid month in Sulphur, with an average relative humidity of 81%.
February is the month with the least rainfall. Rain falls for 11.8 days and accumulates 1.54" (39mm) of precipitation.
February through December are months without snowfall.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
The months with the highest UV index are May through August, with an average maximum UV index of 7.
June has the longest days of the year, with an average of 14h and 6min of daylight.
With an average of 10.6h of sunshine, June has the most sunshine of the year.
In Sulphur, August records the average highest temperatures, peaking at 91.9°F (33.3°C) and reaching a low of 75.4°F (24.1°C).
The month with the most rainfall is August, when the rain falls for 17.7 days and typically aggregates up to 3.9" (99mm) of precipitation.
The least humid month is October, with an average relative humidity of 72%.
The month with the shortest days in Sulphur is December, with an average of 10h and 12min of daylight.
With an average of 5h of sunshine, December has the least sunshine of the year.
December is the month with the lowest UV index, with an average maximum UV index of 3.
Average temperature
Sulphur, LA
The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is January (59.2°F).
The month with the highest average low temperature is July (75.7°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure
Sulphur, LA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.94"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Sulphur, LA
- Average wind speed in January:
8mph - Average wind speed in February:
8.4mph - Average wind speed in March:
8.4mph - Average wind speed in April:
8.9mph - Average wind speed in May:
8mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
6mph - Average wind speed in August:
5.9mph - Average wind speed in September:
6.2mph - Average wind speed in October:
7.1mph - Average wind speed in November:
7.8mph - Average wind speed in December:
8mph
The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity
Sulphur, LA
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Sulphur, LA
- Average rainfall in January:
2.36" - Average rainfall in February:
1.54" - Average rainfall in March:
1.81" - Average rainfall in April:
1.93" - Average rainfall in May:
2.52" - Average rainfall in June:
2.36"
The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is February (1.54").
Average rainfall days
Sulphur, LA
- Average rainfall days in January:
10.6 days - Average rainfall days in February:
11.8 days - Average rainfall days in March:
13.1 days - Average rainfall days in April:
13 days - Average rainfall days in May:
12.4 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
16.5 days - Average rainfall days in August:
17.7 days - Average rainfall days in September:
15.7 days - Average rainfall days in October:
11.6 days - Average rainfall days in November:
9.9 days - Average rainfall days in December:
13.1 days
The month with the highest number of rainy days is August (17.7 days).
The month with the least rainy days is November (9.9 days).
Average snowfall
Sulphur, LA
The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days
Sulphur, LA
- Average snowfall days in January:
0.2 days - Average snowfall days in February:
0 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight / Average sunshine
Sulphur, LA
- Average daylight in January:
10h and 30min - Average daylight in February:
11h and 6min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 54min - Average daylight in May:
13h and 42min - Average daylight in June:
14h and 6min
- Average daylight in July:
13h and 54min - Average daylight in August:
13h and 12min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 24min - Average daylight in November:
10h and 36min - Average daylight in December:
10h and 12min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in January:
5h and 18min - Average sunshine in February:
5h and 30min - Average sunshine in March:
7h and 12min - Average sunshine in April:
9h and 12min - Average sunshine in May:
10h and 12min - Average sunshine in June:
10h and 36min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 30min - Average sunshine in September:
9h and 42min - Average sunshine in October:
6h and 30min - Average sunshine in November:
5h and 48min - Average sunshine in December:
5h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days
Sulphur, LA
- Average sunshine days in January:
18.3 days - Average sunshine days in February:
14.1 days - Average sunshine days in March:
15.8 days - Average sunshine days in April:
15.3 days - Average sunshine days in May:
16 days - Average sunshine days in June:
11.8 days
- Average sunshine days in July:
12 days - Average sunshine days in August:
10.6 days - Average sunshine days in September:
12.7 days - Average sunshine days in October:
17.7 days - Average sunshine days in November:
17.9 days - Average sunshine days in December:
16.5 days
The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is August (10.6 days).
Average UV index
Sulphur, LA
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
Sulphur, LA
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 26).
Average visibility
Sulphur, LA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
