Sulphur Springs weather in September

In September, Sulphur Springs sees average daytime highs of 87°F and overnight lows near 67°F, with 2.9 in of rain across 6.5 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 90°F in the first days to 83°F by the end. The sky is clear or mostly clear about 54% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Sulphur Springs's 1st-clearest and 10th-windiest month. For the whole year in context, see Sulphur Springs's year-round climate.

Daytime high
87°
4th warmest
Overnight low
67°
9th coldest
Rainfall
2.9 in
6.5 wet days
Daylight
12 h 12 min
6:11 AM – 6:23 PM
Cloud cover
41%
1st clearest
Wind
6 mph
10th windiest
Solar energy
5.06 kWh/m²
Travel score
5.4
out of 10

Sulphur Springs is city in Hopkins County, Texas, USA.

Density
263/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 90°F in the first days to 83°F by the end.

A typical September day in Sulphur Springs reaches about 87°F in the afternoon and slips back to 67°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 94°F. Set against its neighbours, September runs about 6°F cooler than August and about 10°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19172
29172
39071
49071
59071
68971
78970
88970
98970
108869
118869
128869
138768
148768
158768
168767
178667
188667
198666
208666
218566
228565
238565
248564
258464
268464
278463
288363
298362
308362

How September really feels in Sulphur Springs

Once humidity and wind are folded in, September averages 11 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
11
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Sulphur Springs weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan55° / 37°3.37.80.410.13.7
Feb59° / 40°3.68.70.610.84.6
Mar66° / 48°4.69.80.211.76.2
Apr74° / 55°5.29.4012.87.0
May82° / 64°5.411.8013.76.0
Jun89° / 72°3.79.7014.14.4
Jul93° / 75°2.37.50143.4
Aug93° / 74°2.06.4013.23.4
Sep87° / 67°2.96.5012.25.4
Oct76° / 56°4.17.8011.27.4
Nov65° / 46°3.58.10.110.36.3
Dec56° / 39°4.28.10.39.94.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 30%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16931
26931
36931
46832
56832
66832
76733
86733
96832
106832
116832
126832
136733
146733
156832
166832
176832
186931
197030
207030
217129
227228
237327
247426
257525
267525
277525
287525
297525
307525

Chance of precipitation in September

Any precipitation

Sulphur Springs gets around 2.9 in of rain over 6.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 22% and peaks near 25% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
123
223
323
424
524
624
724
825
925
1025
1125
1225
1325
1425
1524
1624
1724
1823
1922
2022
2121
2220
2319
2418
2517
2616
2716
2816
2916
3016

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the muggy band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 53% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1471738341
2571737330
3581736330
4681736320
5791735320
6891735310
7991735300
8991635300
910101635290
1011101634290
1111101634280
1212111634270
1313111634270
1413121633260
1514121633250
1615131632240
1715131732230
1816141731220
1918141730210
2019151729200
2120161728190
2222161726180
2324171825170
2425181824150
2527181823140
2628191822130
2729201821130
2831201820120
2932211719110
3034211718100

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over September. Sunrise moves from 6:01 AM to 6:20 AM, and sunset from 6:44 PM to 6:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:016:44
212.76:016:42
312.76:026:41
412.66:036:40
512.66:036:38
612.56:046:37
712.56:056:35
812.56:056:34
912.46:066:33
1012.46:076:31
1112.46:076:30
1212.36:086:28
1312.36:096:27
1412.36:096:26
1512.26:106:24
1612.26:116:23
1712.26:116:21
1812.16:126:20
1912.16:136:19
2012.16:136:17
2112.06:146:16
2212.06:156:14
2312.06:156:13
2411.96:166:11
2511.96:176:10
2611.96:186:09
2711.86:186:07
2811.86:196:06
2911.76:206:04
3011.76:206:03

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.06 kWh/m².

For context, solar energy here swings from a low near 2.43 kWh/m² to a high of 6.6 kWh/m² in July across the year — September's 5.06 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.4Bright
45.4Bright
55.3Bright
65.3Bright
75.3Bright
85.2Bright
95.2Bright
105.2Bright
115.1Bright
125.1Bright
135.1Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.7Bright
Planning a trip in September

Is September a good time to visit Sulphur Springs?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.4
Sightseeing
6th-best month of the year
7.5
Beach & pool
1st-best month of the year

September is a reasonable time to visit Sulphur Springs for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sulphur Springs in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Sulphur Springs sees daytime highs around 87°F and nights near 67°F. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Sulphur Springs in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (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 Springs peaks around June 22 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 22UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr9Very high
May9Very high
Jun10Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Sulphur Springs in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Sulphur Springs is worst in July — around 21 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (January, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1621 µg/m³Jan 117 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar11Good
Apr11Good
May14Moderate
Jun17Moderate
Jul21Moderate
Aug16Moderate
Sep13Moderate
Oct8Good
Nov8Good
Dec7Good
Location & terrain

Where is Sulphur Springs?

Sulphur Springs sits at 33.1°N, 95.6°W, 502 ft above sea level, in United States. The nearest listed city is Greenville, 29 mi away.

Topography around Sulphur Springs

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Sulphur Springs.

Within 2 miles, the terrain around Sulphur Springs has only modest variations in elevation — a maximum elevation change of 128 ft around an average of 499 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 272 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 554 ft.

The land around Sulphur Springs is covered by grassland (45%) and trees (33%) within 2 miles, grassland (63%) and trees (31%) within 10 miles, and grassland (51%) and trees (40%) within 50 miles.

2 miles
128 ft
10 miles
272 ft
50 miles
554 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Greenville 29 mi · Paris 36 mi · Mount Pleasant 37 mi · Terrell 48 mi · Rockwall 52 mi · Wylie 55 mi · Tyler 57 mi · Forney 57 mi

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
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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 Springs (33.1384°, -95.6011°, elevation 502 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).