September is one of the warmer months of the year in Corpus Christi, with average highs near 31.8°C and lows around 24.7°C (mean 28.3°C). It is a relatively wet time of year, averaging 113 mm of rainfall and 74% relative humidity across the period.
September is one of the warmer months of the year in Corpus Christi. Across 45 years of records, the warmest September in Corpus Christi was 2023 — when the month averaged 31.3°C — while the coldest were 1984 and 1991 at 26.7°C. Typical September days reach 31.8°C with nights near 24.7°C. The long-term trend is warming, about 0.3°C per decade.
September is a relatively wet time of year in Corpus Christi, averaging 113 mm of rainfall. The wettest September on record was 2010 with 312 mm, while the driest was 1982 at 22 mm.
Relative humidity in Corpus Christi during September averages 74%. The most humid September was 2018 at 83%, and the least humid was 2011 at 61%.
September receives about 5.3 kWh/m²/day of solar energy in Corpus Christi. The sunniest September was 2023 at 6.2 kWh/m²/day, and the cloudiest were 1984 and 2018 at 4.5.
Average wind speed in Corpus Christi during September is 3.2 m/s. The windiest September was 1986 at 3.9 m/s, while the calmest was 2022 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.9°C | 28.0°C | 27.9°C | 28.7°C | 29.3°C | +1.4°C |
| Avg High | 31.5°C | 31.5°C | 31.4°C | 32.1°C | 33.1°C | +1.6°C |
| Avg Low | 24.4°C | 24.4°C | 24.5°C | 25.4°C | 25.3°C | +0.9°C |
| Avg Rain | 84 mm | 109 mm | 129 mm | 143 mm | 82 mm | -2 mm |
September temperatures in Corpus Christi have risen by about 1.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 13.2°C (1985) to a record high of 39.9°C (2000).
Rainfall in September is a relatively wet time of year, averaging 113 mm, with a wettest year of 312 mm.
A quieter season to visit Corpus Christi
If your dates are flexible, the more temperate months of April and November tend to be the most comfortable for visiting Corpus Christi. That said, September — with days averaging 31.8°C and nights around 24.7°C (mean 28.3°C) and higher rainfall (113 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 34.1°C | 30.1°C | 26.1°C | 36.9°C | 22.0°C | 58 mm | 68% | 2.9 m/s | 5.6 |
| 2024 | 32.9°C | 29.1°C | 25.3°C | 34.6°C | 20.9°C | 149 mm | 77% | 2.9 m/s | 5 |
| 2023 🔥 | 35.5°C | 31.3°C | 27.0°C | 38.4°C | 25.4°C | 45 mm | 70% | 2.9 m/s | 6.2 |
| 2022 | 32.3°C | 28.7°C | 25.0°C | 34.6°C | 19.5°C | 64 mm | 74% | 2.3 m/s | 5.3 |
| 2021 | 32.5°C | 28.7°C | 24.8°C | 35.3°C | 17.7°C | 84 mm | 74% | 3 m/s | 5.7 |
| 2020 | 31.4°C | 27.6°C | 23.9°C | 34.9°C | 14.6°C | 93 mm | 76% | 3.6 m/s | 4.9 |
| 2019 | 33.2°C | 30.0°C | 26.8°C | 35.0°C | 24.9°C | 63 mm | 74% | 3.6 m/s | 5.3 |
| 2018 | 30.5°C | 28.0°C | 25.6°C | 33.6°C | 21.7°C | 307 mm | 83% | 2.9 m/s | 4.5 |
| 2017 | 32.5°C | 28.7°C | 24.9°C | 34.9°C | 20.3°C | 62 mm | 71% | 3.5 m/s | 5.5 |
| 2016 | 32.5°C | 29.2°C | 25.8°C | 35.0°C | 19.4°C | 77 mm | 75% | 2.9 m/s | 5.6 |
| 2015 | 32.5°C | 28.8°C | 25.2°C | 34.6°C | 22.0°C | 86 mm | 74% | 3 m/s | 5.6 |
| 2014 | 30.7°C | 28.0°C | 25.3°C | 34.2°C | 22.1°C | 204 mm | 81% | 3.4 m/s | 4.9 |
| 2013 | 31.0°C | 28.0°C | 25.1°C | 34.6°C | 19.4°C | 190 mm | 79% | 3.3 m/s | 4.9 |
| 2012 | 32.6°C | 28.6°C | 24.6°C | 36.0°C | 21.0°C | 104 mm | 71% | 3.3 m/s | 5.6 |
| 2011 | 34.9°C | 30.0°C | 25.2°C | 39.4°C | 21.4°C | 29 mm | 61% | 3.2 m/s | 6 |
| 2010 🌧️ | 30.5°C | 27.8°C | 25.0°C | 33.2°C | 15.9°C | 312 mm | 80% | 3.1 m/s | 5 |
| 2009 | 30.9°C | 27.5°C | 24.0°C | 33.9°C | 18.4°C | 185 mm | 78% | 2.7 m/s | 4.7 |
| 2008 | 30.7°C | 26.9°C | 23.0°C | 35.8°C | 18.5°C | 85 mm | 74% | 3 m/s | 5.2 |
| 2007 | 30.8°C | 28.0°C | 25.1°C | 32.1°C | 22.9°C | 84 mm | 80% | 2.7 m/s | 5.3 |
| 2006 | 31.0°C | 27.8°C | 24.5°C | 34.9°C | 19.0°C | 206 mm | 76% | 3.1 m/s | 5 |
| 2005 | 33.7°C | 30.0°C | 26.3°C | 38.9°C | 24.6°C | 83 mm | 73% | 3.3 m/s | 5.4 |
| 2004 | 31.9°C | 28.5°C | 25.0°C | 34.4°C | 22.1°C | 116 mm | 74% | 2.8 m/s | 5.3 |
| 2003 | 29.9°C | 27.2°C | 24.5°C | 32.4°C | 20.8°C | 229 mm | 80% | 2.9 m/s | 4.7 |
| 2002 | 31.1°C | 27.4°C | 23.8°C | 34.2°C | 18.3°C | 187 mm | 78% | 3.5 m/s | 5.2 |
| 2001 | 30.6°C | 27.3°C | 23.9°C | 33.5°C | 18.4°C | 89 mm | 78% | 3.3 m/s | 5.5 |
| 2000 | 33.2°C | 28.8°C | 24.4°C | 39.9°C | 15.7°C | 26 mm | 66% | 3.5 m/s | 6 |
| 1999 | 31.4°C | 27.6°C | 23.8°C | 33.8°C | 17.5°C | 105 mm | 73% | 3.1 m/s | 5.6 |
| 1998 | 31.7°C | 28.5°C | 25.2°C | 35.2°C | 22.9°C | 184 mm | 80% | 3.2 m/s | 4.6 |
| 1997 | 32.5°C | 28.9°C | 25.3°C | 35.6°C | 19.3°C | 109 mm | 72% | 2.9 m/s | 5.6 |
| 1996 | 31.0°C | 27.6°C | 24.2°C | 34.8°C | 15.2°C | 108 mm | 79% | 3 m/s | 5.5 |
| 1995 | 31.9°C | 28.4°C | 24.8°C | 34.3°C | 14.4°C | 134 mm | 74% | 2.7 m/s | 5.6 |
| 1994 | 31.4°C | 27.3°C | 23.1°C | 34.6°C | 16.1°C | 90 mm | 71% | 2.7 m/s | 5.4 |
| 1993 | 32.4°C | 28.4°C | 24.5°C | 35.1°C | 17.6°C | 39 mm | 72% | 3.4 m/s | 5.5 |
| 1992 | 31.5°C | 28.0°C | 24.6°C | 35.2°C | 16.9°C | 80 mm | 74% | 3.4 m/s | 5.4 |
| 1991 | 29.5°C | 26.7°C | 23.9°C | 32.8°C | 15.1°C | 155 mm | 79% | 3.1 m/s | 4.9 |
| 1990 | 31.5°C | 28.1°C | 24.7°C | 34.4°C | 18.0°C | 89 mm | 74% | 2.7 m/s | 5.1 |
| 1989 | 31.4°C | 27.1°C | 22.9°C | 35.0°C | 14.1°C | 73 mm | 68% | 3.3 m/s | 5.8 |
| 1988 | 31.5°C | 27.9°C | 24.3°C | 33.7°C | 19.9°C | 148 mm | 75% | 3.8 m/s | 5.2 |
| 1987 | 32.6°C | 28.5°C | 24.5°C | 35.9°C | 18.7°C | 48 mm | 70% | 3.4 m/s | 5.6 |
| 1986 | 31.9°C | 28.8°C | 25.8°C | 33.5°C | 24.2°C | 55 mm | 77% | 3.9 m/s | 5.2 |
| 1985 | 31.3°C | 28.0°C | 24.7°C | 35.6°C | 13.2°C | 169 mm | 75% | 3.8 m/s | 5.3 |
| 1984 ❄️ | 29.9°C | 26.7°C | 23.5°C | 33.0°C | 13.9°C | 86 mm | 75% | 3.8 m/s | 4.5 |
| 1983 | 30.3°C | 27.2°C | 24.2°C | 36.0°C | 15.5°C | 124 mm | 77% | 3.5 m/s | — |
| 1982 | 33.3°C | 29.2°C | 25.1°C | 36.7°C | 18.9°C | 22 mm | 66% | 3.3 m/s | — |
| 1981 | 31.2°C | 27.8°C | 24.3°C | 33.1°C | 16.0°C | 31 mm | 73% | 3.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 31.8°C with lows near 24.7°C (mean 28.3°C), based on 45 years of NASA POWER data.
September averages 113 mm of rainfall in Corpus Christi, a relatively wet time of year. The wettest on record was 312 mm in 2010.
The hottest September reached 39.9°C in 2000. The coldest dipped to 13.2°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.8°C. Daytime highs moved from 31.2°C to 33.5°C and overnight lows from 24.4°C to 25.6°C over the same span.
September is one of the warmer months of the year in Corpus Christi and a relatively wet time of year, so plan for around 31.8°C daytime highs and 24.7°C at night.
Not quite — September is the 9th coolest month in Corpus Christi, averaging 28.3°C.
For September in Corpus Christi, pack light, breathable clothing and sun protection, with typical highs of 31.8°C and lows of 24.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 74% — moderately humid.
Average wind speed in September is 3.2 m/s. The windiest September on record averaged 3.9 m/s (1986).
The wettest September on record was 2010 with 312 mm. On average, September sees 113 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Corpus Christi behaves each September, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for September specifically, along with year-by-year records and how the month has changed over the decades.
