Canyon Lake weather in September

In September, Canyon Lake sees average daytime highs of 87°F and overnight lows near 68°F, with 3.0 in of rain across 8.3 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 91°F in the first days to 85°F by the end. The sky is clear or mostly clear about 49% 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 Canyon Lake's 3rd-clearest and 12th-windiest month. For the whole year in context, see Canyon Lake's year-round climate.

Daytime high
87°
4th warmest
Overnight low
68°
9th coldest
Rainfall
3.0 in
8.3 wet days
Daylight
12 h 12 min
6:22 AM – 6:33 PM
Cloud cover
46%
3rd clearest
Wind
6 mph
12th windiest
Solar energy
5.16 kWh/m²
Travel score
4.9
out of 10

Canyon Lake is census designated place in Comal County, Texas, United States.

Density
52/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 91°F in the first days to 85°F by the end.

A typical September day in Canyon Lake reaches about 87°F in the afternoon and slips back to 68°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 80°F and 94°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)
19172
29172
39171
49071
59071
69071
78971
88970
98970
108970
118870
128870
138869
148869
158769
168769
178768
188768
198768
208667
218667
228667
238666
248666
258566
268565
278565
288565
298564
308464

How September really feels in Canyon Lake

Once humidity and wind are folded in, September averages 14 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
14
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.

Canyon Lake 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
Jan60° / 41°2.36.910.35.4
Feb64° / 45°2.37.310.96.1
Mar71° / 51°2.99.311.86.8
Apr78° / 58°3.18.912.77.0
May84° / 66°4.211.613.55.4
Jun90° / 71°2.99.713.94.1
Jul93° / 73°1.86.113.73.4
Aug94° / 73°2.36.713.13.2
Sep87° / 68°3.08.312.24.9
Oct79° / 59°3.17.511.37.2
Nov69° / 50°2.6710.57.0
Dec62° / 43°2.67.710.15.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16832
26733
36733
46634
56634
66535
76436
86436
96337
106337
116337
126337
136337
146337
156337
166337
176436
186535
196634
206733
216832
226931
237030
247129
257228
267327
277327
287426
297426
307426

Chance of precipitation in September

Any precipitation

Canyon Lake gets around 3.0 in of rain over 8.3 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 28% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
127
228
328
428
529
629
730
830
931
1031
1131
1231
1331
1431
1531
1631
1730
1830
1929
2028
2127
2226
2325
2425
2524
2623
2723
2822
2922
3022

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 35% 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 (%)
136164332
237164232
337164231
447164231
548164230
648154230
748154230
858154230
958144230
1068144230
1169144230
1269134130
1379134130
14710134030
15810143929
16810143829
17911153729
181011153528
191112163427
201312173226
211413173125
221613172924
231714182823
241914182722
252014192621
262115192520
272315192419
282415202418
292515202417
302615202316

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 6 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
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 6:14 AM to 6:30 AM, and sunset from 6:52 PM to 6:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:146:52
212.66:146:51
312.66:156:49
412.56:156:48
512.56:166:47
612.56:176:46
712.56:176:44
812.46:186:43
912.46:186:42
1012.46:196:40
1112.36:196:39
1212.36:206:38
1312.36:206:37
1412.26:216:35
1512.26:216:34
1612.26:226:33
1712.16:236:31
1812.16:236:30
1912.16:246:29
2012.16:246:28
2112.06:256:26
2212.06:256:25
2312.06:266:24
2411.96:276:22
2511.96:276:21
2611.96:286:20
2711.86:286:19
2811.86:296:17
2911.86:296:16
3011.76:306:15

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.16 kWh/m².

For context, solar energy here swings from a low near 2.72 kWh/m² to a high of 6.7 kWh/m² in July across the year — September's 5.16 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.3Bright
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
275.0Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in September

Hazard calendar for Canyon Lake

In seasonPeak

In September, Canyon Lake sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Canyon Lake sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Canyon Lake?

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

4.9
Sightseeing
9th-best month of the year
7.1
Beach & pool
1st-best month of the year

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

What to pack for Canyon Lake in September

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

In September, Canyon Lake sees daytime highs around 87°F and nights near 68°F. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Canyon Lake 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 Canyon Lake peaks around August 11 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 highHighModerateAug 11UV 11Dec 20UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7Very high
Apr10Very high
May10Extreme
Jun10Extreme
Jul11Extreme
Aug11Extreme
Sep9Very high
Oct6High
Nov5High
Dec4Moderate

Air quality in Canyon Lake 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 Canyon Lake is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1416 µg/m³Dec 136 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar8Good
Apr9Good
May14Moderate
Jun14Moderate
Jul17Moderate
Aug12Good
Sep10Good
Oct6Good
Nov6Good
Dec6Good
Location & terrain

Where is Canyon Lake?

Canyon Lake sits at 29.9°N, 98.3°W, 965 ft above sea level, in United States. The nearest listed city is New Braunfels, 14 mi away.

Topography around Canyon Lake

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

Within 2 miles, the terrain around Canyon Lake has only modest variations in elevation — a maximum elevation change of 259 ft around an average of 961 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 850 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,857 ft.

The land around Canyon Lake is covered by trees (39%) and water (39%) within 2 miles, trees (72%) and grassland (21%) within 10 miles, and trees (51%) and grassland (38%) within 50 miles.

2 miles
259 ft
10 miles
850 ft
50 miles
1,857 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: New Braunfels 14 mi · San Marcos 19 mi · Cibolo 22 mi · Live Oak 22 mi · Schertz 22 mi · Universal City 22 mi · Kyle 24 mi · Converse 25 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 Canyon Lake (29.8752°, -98.2625°, elevation 965 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).