Sulphur in Summer
In summer (June, July and August), Sulphur sees average daytime highs around 90°F and overnight lows near 75°F, with 14.9 in of rain over about 47 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 90°F. The sky is clear or mostly clear about 32% of the time across summer, and the air most often feels oppressive.
Summer is Sulphur's weakest season of the year to visit on our travel score. For the whole year in context, see Sulphur's year-round climate.
- Avg daytime high
- 90°F
- warmest season of the year
- Avg overnight low
- 75°F
- Rainfall
- 14.9 in
- 47 wet days
- Avg wind
- 5 mph
- Travel score
- 3.5
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Sulphur in Summer
Across summer, daytime highs hold fairly steady around 90°F.
A typical summer day in Sulphur reaches about 90°F and drops to 75°F overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Sulphur
Once humidity and wind are folded in, summer brings about 92 days that feel above 90°F and 0 that feel at or below 32°F.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Sulphur weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 61° / 44° | 5.1 | 9.9 | 10.3 | 5.2 |
| Feb | 65° / 48° | 3.7 | 9.4 | 10.9 | 5.9 |
| Mar | 71° / 54° | 4.1 | 10.3 | 11.8 | 6.6 |
| Apr | 77° / 60° | 4.7 | 10 | 12.7 | 6.9 |
| May | 84° / 68° | 4.2 | 11.1 | 13.5 | 5.6 |
| Jun | 88° / 74° | 5.5 | 15.4 | 13.9 | 3.8 |
| Jul | 90° / 75° | 4.5 | 16.2 | 13.8 | 3.3 |
| Aug | 91° / 75° | 4.9 | 15.7 | 13.1 | 3.3 |
| Sep | 87° / 70° | 5.1 | 11.5 | 12.2 | 4.6 |
| Oct | 80° / 61° | 3.9 | 8.2 | 11.3 | 7.0 |
| Nov | 70° / 51° | 4.3 | 8.8 | 10.5 | 6.8 |
| Dec | 63° / 46° | 4.9 | 9.7 | 10.1 | 5.7 |
Cloud cover in Summer
The sky is clear or mostly clear about 32% of the time across summer.
Chance of precipitation in Summer
Sulphur gets around 14.9 in of rain over 47 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 5 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 48 min in early June to 12 h 42 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.0 kWh/m².
Hazard calendar for Sulphur
In summer, Sulphur overlaps its atlantic hurricane season. The full year is below, with each hazard's peak months called out.
Sulphur sits in the Atlantic hurricane belt; the season peaks August–October.
Is summer a good time to visit Sulphur?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Sulphur.
What to pack for Sulphur in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Sulphur sees daytime highs around 90°F and nights near 75°F. Pack light clothes, rain gear and sun protection. About 47 days see rain.
Sea temperature near Sulphur in Summer
The nearest coast averages about 85°F across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 42 mi away) is warmest in August at about 86°F and coldest in January near 59°F.
It's comfortable for a long swim from Apr 1 to Nov 22 — about 7.8 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 59 | 60 | 65 | 71 | 78 | 84 | 86 | 86 | 84 | 78 | 69 | 63 |
| Comfort | Cool | Cool | Cool | Refreshing | Warm | Tropical | Tropical | Tropical | Tropical | Warm | Refreshing | Cool |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 59 | Cool |
| Feb | 60 | Cool |
| Mar | 65 | Cool |
| Apr | 71 | Refreshing |
| May | 78 | Warm |
| Jun | 84 | Tropical |
| Jul | 86 | Tropical |
| Aug | 86 | Tropical |
| Sep | 84 | Tropical |
| Oct | 78 | Warm |
| Nov | 69 | Refreshing |
| Dec | 63 | Cool |
UV index in Sulphur in Summer
Clear-sky midday UV across summer averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sulphur peaks around July 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 6 | 7 | 10 | 10 | 10 | 10 | 9 | 8 | 6 | 5 | 4 |
| Level | Moderate | High | High | Very high | Extreme | Very high | Extreme | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 6 | High |
| Mar | 7 | High |
| Apr | 10 | Very high |
| May | 10 | Extreme |
| Jun | 10 | Very high |
| Jul | 10 | Extreme |
| Aug | 9 | Very high |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 5 | Moderate |
| Dec | 4 | Moderate |
Air quality in Sulphur in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Sulphur is worst in July — around 22 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (December, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 10 | 11 | 12 | 11 | 13 | 18 | 22 | 17 | 14 | 11 | 9 | 8 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 11 | Good |
| Mar | 12 | Good |
| Apr | 11 | Good |
| May | 13 | Moderate |
| Jun | 18 | Moderate |
| Jul | 22 | Moderate |
| Aug | 17 | Moderate |
| Sep | 14 | Moderate |
| Oct | 11 | Good |
| Nov | 9 | Good |
| Dec | 8 | Good |
Where is Sulphur?
Sulphur sits at 30.2°N, 93.4°W, 16 ft above sea level, in United States. The nearest listed city is Lake Charles, 11 mi away.
Topography around Sulphur
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Sulphur.
Within 2 miles, the terrain around Sulphur has only modest variations in elevation — a maximum elevation change of 82 ft around an average of 26 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 144 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 381 ft.
The land around Sulphur is covered by trees (55%) and grassland (25%) within 2 miles, trees (53%) and grassland (28%) within 10 miles, and trees (48%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sulphur (30.2366°, -93.3774°, elevation 16 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.