University of Texas weather in September

In September, University of Texas sees average daytime highs of 89°F and overnight lows near 70°F, with 3.0 in of rain across 8 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 92°F in the first days to 86°F by the end. The sky is clear or mostly clear about 51% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is University of Texas's 2nd-clearest and 12th-windiest month. For the whole year in context, see University of Texas's year-round climate.

Daytime high
89°
4th warmest
Overnight low
70°
9th coldest
Rainfall
3.0 in
8 wet days
Daylight
12 h 12 min
6:20 AM – 6:31 PM
Cloud cover
45%
2nd clearest
Wind
6 mph
12th windiest
Solar energy
5.17 kWh/m²
Travel score
4.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 92°F in the first days to 86°F by the end.

A typical September day in University of Texas reaches about 89°F in the afternoon and slips back to 70°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 81°F and 96°F. Set against its neighbours, September runs about 6°F cooler than August and about 9°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19373
29373
39273
49273
59273
69172
79172
89172
99172
109071
119071
129071
139071
148971
158970
168970
178970
188969
198869
208869
218868
228868
238767
248767
258767
268767
278766
288666
298665
308665

How September really feels in University of Texas

Once humidity and wind are folded in, September averages 20 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
20
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.

University of Texas weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan61° / 42°2.47.110.35.5
Feb65° / 45°2.47.410.96.2
Mar72° / 52°2.9911.86.9
Apr79° / 59°3.38.712.77.0
May85° / 67°4.610.813.55.2
Jun91° / 73°3.09.213.93.7
Jul95° / 75°1.65.713.82.9
Aug95° / 75°2.35.613.12.7
Sep89° / 70°3.0812.24.4
Oct81° / 60°3.37.211.37.0
Nov70° / 50°2.96.710.57.1
Dec62° / 43°2.87.410.15.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% 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 32%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16832
26832
36832
46634
56634
66535
76535
86535
96337
106337
116337
126337
136238
146337
156337
166436
176535
186535
196634
206733
216832
227030
237129
247327
257426
267525
277525
287624
297624
307624

Chance of precipitation in September

Any precipitation

University of Texas gets around 3.0 in of rain over 8 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 26% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
125
225
326
427
527
628
728
829
929
1029
1130
1230
1330
1430
1530
1629
1729
1828
1928
2027
2126
2225
2324
2423
2523
2622
2721
2821
2920
3020

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 63% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1361538381
2371537371
3471537371
4471436371
5571436361
6571436361
7571436361
8671435371
9671335371
10771335371
11781334381
12881234381
13881233381
14981233370
15991332370
161091331360
171091430360
1811101429350
1913101528340
2014111527320
2115121626310
2217121626290
2318131725280
2420131724260
2521131723250
2622141823230
2723141823220
2824141922200
2925141922190
3026141922180

Wind in September

Winds average 6 mph in September, the calmest month.

Across September, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 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 54 minutes over September. Sunrise moves from 6:11 AM to 6:28 AM, and sunset from 6:50 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:116:50
212.66:126:49
312.66:136:47
412.66:136:46
512.56:146:45
612.56:146:44
712.56:156:42
812.46:156:41
912.46:166:40
1012.46:166:39
1112.36:176:37
1212.36:186:36
1312.36:186:35
1412.26:196:33
1512.26:196:32
1612.26:206:31
1712.16:206:29
1812.16:216:28
1912.16:226:27
2012.16:226:25
2112.06:236:24
2212.06:236:23
2312.06:246:22
2411.96:246:20
2511.96:256:19
2611.96:266:18
2711.86:266:16
2811.86:276:15
2911.86:276:14
3011.76:286:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.17 kWh/m².

For context, solar energy here swings from a low near 2.68 kWh/m² to a high of 6.72 kWh/m² in July across the year — September's 5.17 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.5Bright
45.5Bright
55.5Bright
65.4Bright
75.4Bright
85.3Bright
95.3Bright
105.2Bright
115.2Bright
125.2Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
274.9Bright
284.9Bright
294.9Bright
304.8Bright
Planning a trip in September

Is September a good time to visit University of Texas?

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

4.4
Sightseeing
9th-best month of the year
7.0
Beach & pool
2nd-best month of the year

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

What to pack for University of Texas in September

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

In September, University of Texas sees daytime highs around 89°F and nights near 70°F. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in University of Texas 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 University of Texas peaks around July 24 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 24UV 11Dec 20UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7High
Apr10Very high
May10Extreme
Jun10Extreme
Jul11Extreme
Aug11Extreme
Sep8Very high
Oct6High
Nov5Moderate
Dec4Moderate

Air quality in University of Texas 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 University of Texas is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1418 µg/m³Nov 237 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar9Good
Apr10Good
May14Moderate
Jun16Moderate
Jul18Moderate
Aug13Moderate
Sep11Good
Oct7Good
Nov7Good
Dec7Good
Location & terrain

Where is University of Texas?

University of Texas sits at 30.3°N, 97.7°W, 600 ft above sea level, in United States. The nearest listed city is Austin, 1.2 mi away.

Topography around University of Texas

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

Within 2 miles, the terrain around University of Texas has only modest variations in elevation — a maximum elevation change of 253 ft around an average of 568 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 735 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,647 ft.

The land around University of Texas is covered by artificial surfaces (58%) and trees (35%) within 2 miles, trees (51%) and artificial surfaces (28%) within 10 miles, and trees (44%) and grassland (44%) within 50 miles.

2 miles
253 ft
10 miles
735 ft
50 miles
1,647 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Austin 1.2 mi · Jollyville 11 mi · Pflugerville 13 mi · Brushy Creek 16 mi · Round Rock 16 mi · Cedar Park 16 mi · Hutto 21 mi · Leander 21 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 University of Texas (30.286°, -97.7389°, elevation 600 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).