After a record-breaking August with respect to hot temperatures in Del Rio, it's no surprise that this summer has also claimed top distinction in the record books for heat. While records aren't specifically taken for seasons, since start and end dates of these seasons fluctuate slightly from year to year, it's unlikely that these fluctuations in the dates make significant impact on temperature records (perhaps more so on precipitation records).
Since weather records have been taken beginning in 1906, 2019's summer (June 21st - September 22nd) claimed first place in average daily maximum temperature, average daily minimum temperature, average daily temperature (the average of the maximum and minimum), the total number of 100°F-plus days, and scored in 6th place as the driest on record.
For Average Daily High Temperature: This summer averaged 100.3°F, coming in at first place, with the normal average high (since 1906) of 95°F.
For Average Daily Low Temperature: This summer average 76.9°F, coming in at first place, with the normal average low (since 1906) of 74°F.
The Average Daily Temperature: Combining the average highs and lows, 2019 comes in first place with approximately 88.6°F, with the normal average (since 1906) being 84.5°F.
This year also placed in first place for triple-digits, with 60 days of 100°F-plus high temperatures.
Although the recent drought does put this year as the driest on record from July 1st until the end of summer (with only 0.01 inches recorded at the Del Rio Airport), rainfall during the second half of June (which was technically during the summer season) contributed to a total rainfall accumulation of 1.21 inches during the entire summer, placing 2019 in sixth place overall for driest on record, with a normal average (since 1906) of approximately 6.03 inches.
Of note, 1.13 inches fell on June 21st, 2019 - which was the first full day of summer this year - and aside from this, only 0.08 inches of rain fell between June 22nd and September 22nd. If it wasn't for June 21st's rainfall, this summer would place in first for driest on record.