With the month of September at a close, weather records for Del Rio, Texas with the year 2019 on top continue to add up. While September 2019's records are not as numerous as August 2019's, there are a couple worth noting, along with some honorable mentions. Records are taken from Del Rio Airport, since 1906. Here they are:
September 2019 in Del Rio set a record for the warmest monthly-average daily minimum temperature. This value comes by averaging the minimum temperature for each day of the month. This September, the average was 76.7°F. Second place for this record goes to 1911, a whole 1.6°F lower than 2019 at 75.1°F. The normal average monthly mean minimum temperature is 69.8°F. For this to occur, minimum temperatures much drop into the 60's at least a few times during the month, but in September 2019, no low temperature ever dropped into the 60's - which makes September 2019 one of only three total Septembers to never drop below 70 degrees - the other two being 1911 and 1933. Of note, 2019 and 1911 share the first place record for the warmest monthly-minimum temperature in the month of September, at 72°F, meaning that no temperature ever dropped below 72°F during the entire month.
September 2019 also claimed first place for the warmest monthly average temperature - which is computed by averaging the highs and lows of each day together. September 2019's average temperature was 87.6°F, with second place going again to 1911, which averaged 86.8°F. The normal average temperature for September is 80.3°F.
September 2019 did not claim first place for the warmest average daily maximum temperature, but came in close second place with an average daily high temperature of 98.4°F, which ties with 1911. First place remains to be held by September 1977, when the average high temperature was 0.2°F higher at 98.6°F. The normal daily high averages at 90.8°F.
Del Rio's September 2019 came in fourth place for the most 100°F-or-greater days, with 10 total. September of 1977 clocked 12 days, with 1912 and 2000 recording 11 days each. So far this year, Del Rio has accumulated 66 days of 100°F-or-greater temperatures, placing 2019 in sixth place overall, behind 1951 and 1998 with 69 total days, 2001 with 72 total days, 1953 with 78 total days, and 2011 with a whopping 85 total days of 100°F-or-greater.
September 2019 in Del Rio did manage to score 0.10 inches of rainfall at the Del Rio Airport, 0.09 inches of which fell on September 30th, hours prior to end of the month. This places September 2019 in seventh place overall for the driest September on record, beat by 1907, 1930, 1931, 1952, 1999, and 2005. The normal rainfall during September is 2.20 inches. However, September 2019 marked the first time since July 1st, 2019, in which measurable rainfall was recorded at the Del Rio Airport, making it the driest July-September on record. To date, 13.36 inches of rain has fallen in 2019 at the Del Rio Airport, with a normal accumulation of 15.71 inches year-to-date.