Corpus Christi weather in September

In September, Corpus Christi sees average daytime highs of 89°F and overnight lows near 74°F, with 4.4 in of rain across 13.5 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 91°F in the first days to 87°F by the end. The sky is clear or mostly clear about 45% 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 48 min by month's end. Set against the rest of the year, September is Corpus Christi's 5th-clearest and 12th-windiest month. For the whole year in context, see Corpus Christi's year-round climate.

Daytime high
89°
4th warmest
Overnight low
74°
9th coldest
Rainfall
4.4 in
13.5 wet days
Daylight
12 h 12 min
6:19 AM – 6:29 PM
Cloud cover
51%
5th clearest
Wind
8 mph
12th windiest
Solar energy
5.14 kWh/m²
Travel score
4.0
out of 10

Corpus Christi is city and county seat of Nueces County, Texas, United States.

Density
242/km²
people per km²
Founded
1839

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 87°F by the end.

A typical September day in Corpus Christi reaches about 89°F in the afternoon and slips back to 74°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 84°F and 93°F. Set against its neighbours, September runs about 3°F cooler than August and about 6°F warmer than October.

60°70°80°90°100°151015202530
Avg high (°F)Avg low (°F)
19176
29176
39176
49076
59076
69076
79076
89076
99076
108976
118975
128975
138975
148975
158975
168974
178874
188874
198874
208874
218873
228873
238773
248773
258772
268772
278772
288771
298771
308671

How September really feels in Corpus Christi

Once humidity and wind are folded in, September averages 30 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
30
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.

Corpus Christi weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan67° / 50°1.96.910.46.6
Feb70° / 54°1.56.2116.9
Mar75° / 60°2.36.811.87.4
Apr80° / 66°2.0712.66.9
May86° / 72°2.8913.45.3
Jun90° / 77°2.99.613.74.2
Jul91° / 78°2.37.913.63.8
Aug92° / 77°2.39.2133.4
Sep89° / 74°4.413.512.24.0
Oct83° / 67°3.29.311.36.3
Nov75° / 58°2.1710.67.4
Dec68° / 52°2.17.310.36.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% 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 38%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25644
35743
45644
55545
65545
75545
85545
95545
105644
115644
125743
135743
145842
155842
165941
176040
186139
196337
206436
216535
226634
236733
246832
257030
267129
277228
287228
297327
307426

Chance of precipitation in September

Any precipitation

Corpus Christi gets around 4.4 in of rain over 13.5 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 45% and peaks near 52% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
147
248
349
449
550
651
751
852
952
1052
1152
1251
1351
1450
1550
1649
1748
1846
1945
2043
2142
2240
2339
2437
2536
2635
2734
2833
2933
3032

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 40% of days. Sticky, muggy-or-worse air turns up on roughly 89% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100154647
200264646
301264645
401264644
501264744
601374743
701374743
801374642
901384642
1011384541
1111494541
1211494441
13124104340
14125114240
15125124239
16125134138
17126133938
18236143837
19237153736
20338163635
21349163534
22349173432
234410173331
244511183329
254512183228
265613183226
275613193225
285614193223
296714193322
306715193320

Wind in September

Winds average 8 mph in September, the calmest month.

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

0246810151015202530
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over September. Sunrise moves from 6:12 AM to 6:26 AM, and sunset from 6:47 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:126:47
212.66:126:46
312.56:136:44
412.56:136:43
512.56:146:42
612.46:146:41
712.46:156:40
812.46:156:38
912.46:166:37
1012.36:166:36
1112.36:176:35
1212.36:176:34
1312.26:186:32
1412.26:186:31
1512.26:196:30
1612.26:196:29
1712.16:196:28
1812.16:206:26
1912.16:206:25
2012.06:216:24
2112.06:216:23
2212.06:226:21
2312.06:226:20
2411.96:236:19
2511.96:236:18
2611.96:246:17
2711.96:246:15
2811.86:256:14
2911.86:256:13
3011.86:266:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.14 kWh/m².

For context, solar energy here swings from a low near 2.75 kWh/m² to a high of 6.61 kWh/m² in July across the year — September's 5.14 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.4Bright
55.4Bright
65.3Bright
75.3Bright
85.3Bright
95.2Bright
105.2Bright
115.2Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Hazard calendar for Corpus Christi

In seasonPeak

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

Corpus Christi 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 Corpus Christi?

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

4.0
Sightseeing
10th-best month of the year
6.1
Beach & pool
7th-best month of the year

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

What to pack for Corpus Christi in September

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

In September, Corpus Christi sees daytime highs around 89°F and nights near 74°F. Pack light clothes. Worth having: rain gear and sun protection. About 14 days see rain.

light clothesrain gearsun protection

Sea temperature near Corpus Christi in September

The nearest coast averages about 84°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 mi away) is warmest in September at about 84°F and coldest in February near 64°F.

It's comfortable for a long swim from Mar 29 to Dec 20 — about 8.8 months when the water holds above 68°F.

60°70°80°90°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan65Cool
Feb64Cool
Mar66Cool
Apr71Refreshing
May77Warm
Jun82Tropical
Jul83Tropical
Aug84Tropical
Sep84Tropical
Oct80Warm
Nov73Refreshing
Dec69Refreshing

UV index in Corpus Christi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Corpus Christi peaks around June 16 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highHighModerateJun 16UV 11Dec 21UV 4
UV index (midday)Level
Jan5Moderate
Feb6High
Mar7High
Apr10Very high
May11Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep10Very high
Oct7High
Nov5High
Dec4Moderate

Air quality in Corpus Christi 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 Corpus Christi is worst in July — around 20 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (November, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1419 µg/m³Nov 116 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar12Good
Apr12Good
May16Moderate
Jun17Moderate
Jul20Moderate
Aug13Moderate
Sep11Good
Oct6Good
Nov6Good
Dec7Good
Location & terrain

Where is Corpus Christi?

Corpus Christi sits at 27.8°N, 97.4°W, 7 ft above sea level, in United States. The nearest listed city is Portland, 6.8 mi away.

Topography around Corpus Christi

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

Within 2 miles, the terrain around Corpus Christi has only modest variations in elevation — a maximum elevation change of 85 ft around an average of 13 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 108 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 407 ft.

The land around Corpus Christi is covered by water (45%) and artificial surfaces (36%) within 2 miles, water (40%) and cropland (24%) within 10 miles, and water (31%) and grassland (25%) within 50 miles.

2 miles
85 ft
10 miles
108 ft
50 miles
407 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Portland 6.8 mi · Kingsville 34 mi · Alice 41 mi · Victoria 73 mi · Harlingen 112 mi · Edinburg 114 mi · San Benito 116 mi · Mercedes 119 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 Corpus Christi (27.8006°, -97.3964°, elevation 7 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). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).