Hutto weather in September

In September, Hutto sees average daytime highs of 89°F and overnight lows near 70°F, with 2.9 in of rain across 7.5 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 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 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 Hutto's 2nd-clearest and 12th-windiest month. For the whole year in context, see Hutto's year-round climate.

Daytime high
89°
4th warmest
Overnight low
70°
9th coldest
Rainfall
2.9 in
7.5 wet days
Daylight
12 h 12 min
6:19 AM – 6:30 PM
Cloud cover
44%
2nd clearest
Wind
7 mph
12th windiest
Solar energy
5.18 kWh/m²
Travel score
4.5
out of 10

Hutto is city in Williamson County, Texas, United States.

Density
1,129/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 92°F in the first days to 86°F by the end.

A typical September day in Hutto reaches about 89°F in the afternoon and slips back to 70°F overnight — a 19°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)
19374
29373
39273
49273
59273
69273
79172
89172
99172
109172
119071
129071
139071
148971
158970
168970
178970
188969
198869
208869
218868
228868
238868
248767
258767
268767
278766
288766
298666
308665

How September really feels in Hutto

Once humidity and wind are folded in, September averages 19 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
19
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.

Hutto 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 daysDaylight (hours)Travel score
Jan61° / 41°2.57.210.25.4
Feb65° / 45°2.57.710.96.1
Mar71° / 52°3.09.111.86.8
Apr78° / 58°3.18.512.77.0
May85° / 67°4.410.713.55.3
Jun91° / 73°2.88.913.93.7
Jul95° / 75°1.55.713.82.8
Aug95° / 75°2.25.713.12.7
Sep89° / 70°2.97.512.24.5
Oct80° / 60°3.67.111.37.0
Nov70° / 50°2.9710.57.1
Dec62° / 43°2.97.610.15.8

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 31%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16832
26832
36733
46733
56634
66634
76535
86535
96436
106436
116337
126337
136337
146436
156436
166436
176634
186733
196832
206931
217030
227228
237327
247426
257624
267624
277723
287723
297723
307624

Chance of precipitation in September

Any precipitation

Hutto gets around 2.9 in of rain over 7.5 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 25% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
123
224
325
425
526
627
727
827
928
1028
1128
1228
1328
1428
1528
1627
1727
1826
1925
2025
2124
2223
2322
2421
2520
2620
2719
2819
2919
3019

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 62% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1361536391
2471536381
3471535381
4571535381
5571535381
6671534371
7671534371
8771533381
9771533381
10871532371
11871532381
12871532380
13971531380
14971531370
151081530370
161181629360
171181629350
181291628340
1914101627330
2015101726320
2116111726300
2218121725290
2319121724270
2421131724260
2522141723240
2623141723220
2725141723210
2826151723200
2927151723180
3028151723170

Wind in September

Winds average 7 mph in September, the calmest month.

Across September, daily wind ranges from about 7 mph on the calmest days to 7 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
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:10 AM to 6:27 AM, and sunset from 6:49 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:106:49
212.66:116:48
312.66:126:47
412.66:126:46
512.56:136:44
612.56:136:43
712.56:146:42
812.46:146:40
912.46:156:39
1012.46:166:38
1112.36:166:37
1212.36:176:35
1312.36:176:34
1412.26:186:33
1512.26:186:31
1612.26:196:30
1712.26:206:29
1812.16:206:27
1912.16:216:26
2012.16:216:25
2112.06:226:23
2212.06:236:22
2312.06:236:21
2411.96:246:19
2511.96:246:18
2611.96:256:17
2711.86:266:16
2811.86:266:14
2911.86:276:13
3011.76:276:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.18 kWh/m².

For context, solar energy here swings from a low near 2.67 kWh/m² to a high of 6.76 kWh/m² in July across the year — September's 5.18 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.4Bright
75.4Bright
85.3Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.2Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in September

Is September a good time to visit Hutto?

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

4.5
Sightseeing
9th-best month of the year
7.0
Beach & pool
2nd-best month of the year

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

What to pack for Hutto in September

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

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

light clothessun protection

UV index in Hutto 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 Hutto 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 Hutto 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 Hutto is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1417 µg/m³Dec 127 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar9Good
Apr10Good
May14Moderate
Jun15Moderate
Jul18Moderate
Aug13Moderate
Sep10Good
Oct7Good
Nov7Good
Dec7Good
Location & terrain

Where is Hutto?

Hutto sits at 30.5°N, 97.5°W, 663 ft above sea level, in United States. The nearest listed city is Round Rock, 8.1 mi away.

Topography around Hutto

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

Within 2 miles, the terrain around Hutto has only modest variations in elevation — a maximum elevation change of 141 ft around an average of 653 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 472 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,371 ft.

The land around Hutto is covered by cropland (34%), grassland (31%) and artificial surfaces (26%) within 2 miles, grassland (41%) and cropland (32%) within 10 miles, and grassland (46%) and trees (39%) within 50 miles.

2 miles
141 ft
10 miles
472 ft
50 miles
1,371 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Round Rock 8.1 mi · Pflugerville 8.1 mi · Taylor 8.7 mi · Georgetown 9.9 mi · Brushy Creek 12 mi · Jollyville 16 mi · Cedar Park 17 mi · Leander 19 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 Hutto (30.5427°, -97.5467°, elevation 663 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).