Stephenville weather in September

In September, Stephenville sees average daytime highs of 87°F and overnight lows near 67°F, with 2.4 in of rain across 6.2 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 91°F in the first days to 84°F by the end. The sky is clear or mostly clear about 56% 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 Stephenville's 2nd-clearest and 11th-windiest month. For the whole year in context, see Stephenville's year-round climate.

Daytime high
87°
4th warmest
Overnight low
67°
9th coldest
Rainfall
2.4 in
6.2 wet days
Daylight
12 h 12 min
6:21 AM – 6:33 PM
Cloud cover
41%
2nd clearest
Wind
7 mph
11th windiest
Solar energy
5.23 kWh/m²
Travel score
5.3
out of 10

Stephenville is city in and the county seat of Erath County, Texas, United States.

Density
652/km²
people per km²
Founded
1856

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 91°F in the first days to 84°F by the end.

A typical September day in Stephenville 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 95°F. Set against its neighbours, September runs about 7°F cooler than August and about 10°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19172
29171
39171
49071
59071
69070
78970
88970
98969
108869
118869
128869
138868
148768
158768
168767
178767
188667
198666
208666
218666
228565
238565
248565
258564
268564
278463
288463
298463
308362

How September really feels in Stephenville

Once humidity and wind are folded in, September averages 8 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
8
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.

Stephenville weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan57° / 37°2.05.60.510.14.7
Feb62° / 40°2.260.510.85.7
Mar69° / 48°3.18.10.111.86.8
Apr76° / 55°3.17.2012.87.4
May83° / 64°4.110.4013.65.8
Jun91° / 71°2.98.1014.13.9
Jul95° / 75°1.75.9013.92.9
Aug94° / 74°1.96.4013.23.1
Sep87° / 67°2.46.2012.25.3
Oct77° / 57°3.36.8011.27.5
Nov66° / 46°2.35.90.210.36.9
Dec58° / 38°2.15.30.49.95.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17426
27327
37327
47228
57129
67228
77129
87030
97030
106931
116931
126931
136931
147030
157030
167030
177030
187129
197129
207228
217327
227525
237525
247624
257723
267723
277822
287822
297822
307822

Chance of precipitation in September

Any precipitation

Stephenville gets around 2.4 in of rain over 6.2 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 21% 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
224
324
424
525
625
725
825
925
1024
1124
1224
1324
1423
1523
1622
1722
1821
1921
2020
2119
2218
2317
2417
2516
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 33% of days. Sticky, muggy-or-worse air turns up on roughly 41% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1516293911
2616293811
3716283811
4816283711
5916283611
61015283611
71115283611
81114283611
91213273611
101313273611
111412273611
121412263711
131512263711
141611263710
151711253710
16181225369
17191225368
18211224358
19221323347
20241423337
21261422326
22281521305
23301621295
24321620284
25341720263
26351720253
27371720233
28381820222
29401820212
30411819202

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237light breeze
247light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze

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 6:12 AM to 6:30 AM, and sunset from 6:53 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:126:53
212.76:126:52
312.66:136:51
412.66:146:49
512.66:146:48
612.56:156:47
712.56:166:45
812.56:166:44
912.46:176:43
1012.46:176:41
1112.46:186:40
1212.36:196:39
1312.36:196:37
1412.36:206:36
1512.26:216:34
1612.26:216:33
1712.26:226:32
1812.16:236:30
1912.16:236:29
2012.16:246:27
2112.06:256:26
2212.06:256:25
2312.06:266:23
2411.96:266:22
2511.96:276:21
2611.96:286:19
2711.86:286:18
2811.86:296:16
2911.86:306:15
3011.76:306:14

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.23 kWh/m².

For context, solar energy here swings from a low near 2.75 kWh/m² to a high of 6.9 kWh/m² in July across the year — September's 5.23 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.3Bright
115.3Bright
125.3Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
294.9Bright
304.9Bright
Planning a trip in September

Is September a good time to visit Stephenville?

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

5.3
Sightseeing
7th-best month of the year
7.5
Beach & pool
1st-best month of the year

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

What to pack for Stephenville in September

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

In September, Stephenville sees daytime highs around 87°F and nights near 67°F. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

UV index in Stephenville in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Stephenville peaks around July 18 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 18UV 11Dec 20UV 3
UV index (midday)Level
Jan4Moderate
Feb5High
Mar6High
Apr9Very high
May10Very high
Jun10Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Stephenville 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 Stephenville is worst in July — around 16 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (December, 5 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1516 µg/m³Dec 125 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar8Good
Apr9Good
May13Moderate
Jun14Moderate
Jul16Moderate
Aug12Moderate
Sep10Good
Oct6Good
Nov6Good
Dec5Good
Location & terrain

Where is Stephenville?

Stephenville sits at 32.2°N, 98.2°W, 1,273 ft above sea level, in United States. The nearest listed city is Weatherford, 44 mi away.

Topography around Stephenville

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

Within 2 miles, the terrain around Stephenville has only modest variations in elevation — a maximum elevation change of 180 ft around an average of 1,299 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 614 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,457 ft.

The land around Stephenville is covered by grassland (42%), trees (31%) and artificial surfaces (22%) within 2 miles, grassland (63%) and trees (29%) within 10 miles, and grassland (58%) and trees (36%) within 50 miles.

2 miles
180 ft
10 miles
614 ft
50 miles
1,457 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Weatherford 44 mi · Cleburne 48 mi · Benbrook 53 mi · Breckenridge 55 mi · Burleson 56 mi · White Settlement 57 mi · Brownwood 58 mi · Gatesville 60 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 Stephenville (32.2207°, -98.2023°, elevation 1,273 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).