Sulphur, Louisiana Weather
Fireflies pulse through the magnolias. Day 78 of spring. Read this microseason across nine climate regions →
Sulphur weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Light Drizzle54%0.01″81°73°—
- FridayJun 5Overcast27%—86°70°+5°
- SaturdayJun 6Light Drizzle43%—89°73°+3°
- SundayJun 7Heavy Drizzle21%—88°74°-1°
- MondayJun 8Light Drizzle——91°74°+3°
- TuesdayJun 9Light Drizzle31%—87°70°-4°
- WednesdayJun 10Partly Cloudy27%—91°71°+4°
Ozone at AQI 32. AQI flat over the last 6 hours (within ±3 points). Overcast through the UV peak window (cloud cover ~64%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 32. Overcast through the UV peak window (cloud cover ~64%) — afternoon ozone should stay flat.
- Present
- AQI 32
- UV peak
- 0.1 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 4:52 AM
- Moonset
- 3:41 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Sulphur at a glance
- Today vs. normal: 8°F below the seasonal normal for this latitude
- Last frost: February 16 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Sulphur
SPC has placed Sulphur in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
Sulphur's warmest month is August (~84°F mean) and its coldest is January (~53°F). Rainfall peaks in June (6.5 inches) and bottoms out in February (3.3 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 53° | 5.9″ | 6 |
| February | 57° | 3.3″ | 5 |
| March | 63° | 3.7″ | 5 |
| April | 69° | 4.4″ | 5 |
| May | 76° | 5.4″ | 5 |
| June | 82° | 6.5″ | 8 |
| July | 84° | 5.7″ | 8 |
| August | 84° | 6.2″ | 7 |
| September | 80° | 5.2″ | 6 |
| October | 71° | 4.8″ | 5 |
| November | 61° | 4.1″ | 5 |
| December | 55° | 4.6″ | 6 |
Regional context
Sulphur sits within a humid subtropical climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: New Orleans, LA, Baton Rouge, LA, Shreveport, LA, Lafayette, LA, Lake Charles, LA.
Frequently asked
- When does it freeze in Sulphur?
- Sulphur's last spring frost typically falls around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in Sulphur?
- June is the wettest month with about 6.5 inches of rain on average; the city receives roughly 60 inches annually.
- What is the warmest month in Sulphur?
- August is typically warmest, averaging about 84°F.
- What is the coldest month in Sulphur?
- January is typically coldest, averaging about 53°F.
- When can I start a vegetable garden in Sulphur?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-March); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Sulphur get?
- Sulphur averages about 71 rainy days per year.
- What hardiness zone is Sulphur?
- Sulphur's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Sulphur, Louisiana sits in a humid subtropical climate zone. January means hover near 53°F while July averages 84°F — a 31°F seasonal swing.
Across the year, Sulphur receives about 60 inches of precipitation spread over roughly 71 rainy days.
The rhythm of the year is set by latitude (30.2°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.