Del Rio Shatters March Heat Records With Weekend Temperatures Near 100 Degrees

Del Rio hit 98 degrees on Saturday, March 21, breaking a long-standing daily temperature record and capping the hottest weekend the city has seen in March, as a sprawling heat dome baked Val Verde County along with much of the rest of Texas and the Southwest.

The 96-degree reading recorded on Sunday, March 22, matched an existing record for that date. Back-to-back record-tier temperatures over a single weekend made the event exceptional even by Del Rio's already warm standards. The typical high in Del Rio during March sits around 81°F, meaning Saturday's reading ran roughly 17 degrees above the seasonal average.

The heat was part of a much larger atmospheric event. A strong ridge of high pressure, commonly referred to as a heat dome, developed over the Southwest and Texas, driving temperatures to remarkable levels across a wide corridor. Dozens of cities from Texas to South Dakota and east to the Carolinas broke daily record highs during the same stretch. Many of those records date back more than 100 years, highlighting how unusual this event was for mid to late March.

Del Rio's weekend surge arrived just days after the broader heat dome set all-time national benchmarks further west. Yuma, Arizona, hit 109 degrees, which broke the national March record of 108 degrees previously set at Rio Grande City, Texas. That prior record had stood since 1954, underscoring just how extraordinary the regional pattern was.

National Weather Service forecasters described it as "the hottest stretch of the year so far, arriving very early in the season and with little time for acclimation," adding that the relatively dry airmass did not lessen the significance of the heat.

March typically brings variable conditions, but this pattern delivered persistent, widespread, and record-breaking warmth across multiple climate regions simultaneously, driven by a strong upper-level ridge, dry air, and clear skies that allowed temperatures to climb rapidly and remain elevated over several consecutive days.

An unusually strong and sprawling heat dome was the catalyst, but the magnitude was undoubtedly being worsened by planet-warming pollution, according to climate scientists analyzing the event.

Del Rio's temperature records stretch back to 1905, making Saturday's broken mark one with more than a century of data behind it. Early-season heat of this magnitude can influence water demand, agriculture, and wildfire risk, especially in already dry regions. Val Verde County, which sits along the Rio Grande in a semi-arid climate zone, faces all three of those pressures when temperatures surge this far above normal this early in the year. Forecast models showed no meaningful rainfall for at least seven days following the heat surge, with dry conditions likely persisting into late March.