Kerrville weather in September

In September, Kerrville sees average daytime highs of 86°F and overnight lows near 66°F, with 2.6 in of rain across 7.5 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 89°F in the first days to 84°F by the end. The sky is clear or mostly clear about 48% of the time in September, and the air most often feels muggy.

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 Kerrville's 3rd-clearest and 12th-windiest month. For the whole year in context, see Kerrville's year-round climate.

Daytime high
86°
4th warmest
Overnight low
66°
9th coldest
Rainfall
2.6 in
7.5 wet days
Daylight
12 h 12 min
6:26 AM – 6:36 PM
Cloud cover
45%
3rd clearest
Wind
7 mph
12th windiest
Solar energy
5.19 kWh/m²
Travel score
5.4
out of 10

Kerrville is city in Kerr County, Texas, United States.

Density
409/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 89°F in the first days to 84°F by the end.

A typical September day in Kerrville reaches about 86°F in the afternoon and slips back to 66°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 93°F. Set against its neighbours, September runs about 6°F cooler than August and about 8°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
18969
28969
38969
48969
58869
68869
78868
88868
98768
108768
118767
128767
138667
148667
158667
168666
178666
188566
198565
208565
218565
228565
238564
248464
258464
268463
278463
288363
298362
308362

How September really feels in Kerrville

Once humidity and wind are folded in, September averages 5 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
5
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.

Kerrville weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan59° / 40°1.65.610.35.2
Feb64° / 43°1.96.110.96.3
Mar70° / 49°2.67.911.86.9
Apr77° / 56°2.77.912.77.3
May83° / 64°3.610.813.55.9
Jun89° / 69°2.48.713.94.5
Jul91° / 71°1.6613.73.9
Aug92° / 71°1.86.513.13.8
Sep86° / 66°2.67.512.25.4
Oct78° / 57°2.67.111.37.5
Nov67° / 48°2.26.210.56.9
Dec60° / 41°1.9610.15.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17030
27030
37030
46931
56832
66733
76733
86535
96535
106436
116436
126436
136436
146436
156436
166634
176634
186733
196733
206931
217030
227129
237228
247327
257426
267426
277525
287426
297426
307426

Chance of precipitation in September

Any precipitation

Kerrville gets around 2.6 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 26% and peaks near 30% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
126
226
327
427
528
629
729
829
930
1030
1130
1230
1330
1429
1529
1628
1727
1827
1926
2025
2124
2223
2322
2421
2520
2619
2719
2819
2919
3019

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 40% of days. Sticky, muggy-or-worse air turns up on roughly 48% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
151030469
261030469
361029459
471029459
571029459
681028459
781028459
891027459
9910264510
101010254510
111010254610
121110244610
13121023469
14131023469
15131022459
16141122459
17161121448
18171221438
19191220418
20201320407
21221320387
22241419376
23251519356
24271519336
25281619325
26301619305
27311719295
28321719285
29331719275
30341719264

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 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 6:17 AM to 6:34 AM, and sunset from 6:55 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:176:55
212.66:186:54
312.66:186:53
412.56:196:52
512.56:196:50
612.56:206:49
712.56:216:48
812.46:216:47
912.46:226:45
1012.46:226:44
1112.36:236:43
1212.36:236:41
1312.36:246:40
1412.26:246:39
1512.26:256:38
1612.26:266:36
1712.16:266:35
1812.16:276:34
1912.16:276:32
2012.16:286:31
2112.06:286:30
2212.06:296:28
2312.06:296:27
2411.96:306:26
2511.96:316:25
2611.96:316:23
2711.86:326:22
2811.86:326:21
2911.86:336:19
3011.76:346:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.19 kWh/m².

For context, solar energy here swings from a low near 2.86 kWh/m² to a high of 6.74 kWh/m² in July across the year — September's 5.19 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
195.1Bright
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 Kerrville?

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

5.4
Sightseeing
8th-best month of the year
7.3
Beach & pool
1st-best month of the year

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

What to pack for Kerrville in September

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

In September, Kerrville sees daytime highs around 86°F and nights near 66°F. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Kerrville in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kerrville peaks around August 10 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 highHighModerateAug 10UV 11Dec 19UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7Very high
Apr10Very high
May11Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep9Very high
Oct7High
Nov5Moderate
Dec4Moderate

Air quality in Kerrville 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 Kerrville is worst in July — around 16 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (December, 5 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1415 µg/m³Dec 135 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb6Good
Mar7Good
Apr8Good
May13Moderate
Jun13Moderate
Jul16Moderate
Aug11Good
Sep9Good
Oct5Good
Nov5Good
Dec5Good
Location & terrain

Where is Kerrville?

Kerrville sits at 30.0°N, 99.1°W, 1,637 ft above sea level, in United States. The nearest listed city is Canyon Lake, 54 mi away.

Topography around Kerrville

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

Within 2 miles, the terrain around Kerrville has only modest variations in elevation — a maximum elevation change of 377 ft around an average of 1,716 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 732 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,663 ft.

The land around Kerrville is covered by trees (45%), artificial surfaces (29%) and grassland (24%) within 2 miles, trees (58%) and grassland (38%) within 10 miles, and trees (60%) and grassland (37%) within 50 miles.

2 miles
377 ft
10 miles
732 ft
50 miles
1,663 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Canyon Lake 54 mi · San Antonio 58 mi · Live Oak 58 mi · Converse 62 mi · Universal City 62 mi · Schertz 62 mi · Cibolo 64 mi · New Braunfels 65 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 Kerrville (30.0474°, -99.1403°, elevation 1,637 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).