WEATHER BLOG: When does the first autumn cold front arrive in Corpus Christi?

Late summer and early fall bring strong anticipation for relief from the summer heat of S TX. Here’s a look at how cooler temperatures come in the fall

CORPUS CHRISTI, Texas — It’s a popular question that comes from a long, hot summer in South Texas — “When is the first fall cold front coming?” Cold fronts are one of those things where “beauty is in the eye of the beholder”. This means that a cold front can happen, but is it cold enough for a particular person’s taste? NOTE: there is no “cool” faceplate 🙂

Instead of talking about when the first cold front crosses the Coastal Bend on average, let’s look at when certain temperature thresholds are reached. I broke down when the temperature drops below 70, 65, 60, 55, and 50 for the first time at any time of the day (usually not the afternoon highs). I then broke the data down into historical averages going back to the 1800s, the 30-year average (1991-2020), and last year (2021).

September is a month that usually brings the first post-summer temperature reading below 70°. For me, this is remarkable because it often stays above 70° all summer in Corpus Christi. For example, this year, it has not been below 70° at any time of the day since May 26. On average, mid-September brings temperatures below 70°, usually due to a less humid atmosphere, not necessarily a cold front. It hasn’t happened yet in 2022.

In late September and into October the fronts get a bit stronger and temperatures (usually overnight) will hit the mid 60’s. That doesn’t mean EVERY night will get there, these are just dates when the first time a temperature reading is below a threshold occurs.

During mid to late October/early November, temperatures can periodically hit the 50s or even the 40s overnight. Colder air filters further south as the days get shorter and the Earth’s axial tilt moves away from the sun in the northern hemisphere during winter, which means less direct sunlight and for shorter duration each day.

CURRENT FORECAST (SEPTEMBER 20) – A weak cold front will likely cross southern Texas early next week (September 26/27). Although not strong, it could keep daytime temperatures below 90 and overnight drop into the 60s by the middle of next week. A step in the right direction if you’re looking for relief from the summer heat; at least for a short time. It won’t be a cold front that makes the jackets stand out…not even close.

About Jimmie P. Ricks

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