Weather in Sulphur, Louisiana
Roses open on the Piedmont edge. Day 59 of spring. Read this microseason across nine climate regions →
- TodayMay 16Overcast—83°70°
- SundayMay 17Light Drizzle27%85°73°
- MondayMay 18Thunderstorm14%86°76°
- TuesdayMay 19Overcast27%89°74°
- WednesdayMay 20Light Showers71%88°72°
- ThursdayMay 21Light Showers62%85°72°
- FridayMay 22Overcast64%90°72°
- PM 2.5
- 9.3 μg/m³
- PM 10
- 12.7 μg/m³
- NO₂
- 1.9 μg/m³
- Ozone
- 87.0 μg/m³
- UV Index
- 0.0 Low
When the dew is on the grass, rain will never come to pass.
- Moonrise
- 11:36 AM
- Moonset
- 1:22 AM
- In sign
- ♊︎ Gemini
Roses open on the Piedmont edge
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: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Peak growing season
As of May 17, 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.
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.