Corpus Christi weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Fair
Best time to visit: October – May
What is the weather like in Corpus Christi in September?
In September, Corpus Christi is hot: daytime highs average 30 °C, and even at night it stays warm at around 25 °C. The sea averages 29.2 °C – almost as warm as a bath. The sun shines for around 7 hours a day. Rain is frequent, with about 13 rainy days and 110 mm in total. On about 17 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a so-so month for a holiday in Corpus Christi.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 56 | 53 | 78 |
| Day | 32° | 30° | 27° |
| Night | 27° | 25° | 21° |
| Sea | 29° | 29° | 27° |
| Sun | 9 h | 7 h | 6 h |
| Rain days | 9 | 13 | 9 |
More details for September
- Daylight
- 12 h 22 min07:14 – 19:36
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 27 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 47 %on averageAll months
- Hot days
- 17 days30 °C or moreAll months
- Time zone
- UTC−5America/Chicago
How the score comes together
- Temperatureweight 50 %60 %
- Sunshineweight 20 %62 %
- Few rainy daysweight 30 %34 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Corpus Christi in September: quick answers
Is Corpus Christi hot in September?
Yes. In September, Corpus Christi is hot: daytime highs average 30 °C and nights stay around 25 °C. On about 17 days the thermometer climbs to 30 °C or more.
Can you swim in Corpus Christi in September?
Yes. In September the sea averages 29.2 °C – almost as warm as a bath.
Does it rain much in Corpus Christi in September?
Rain is frequent, with about 13 rainy days and 110 mm in total.
Corpus Christi month by month
The whole year in Corpus ChristiAll destinations: USAWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences