Temperatures climbed well above typical early September levels. McAllen reached 104°F, exceeding its normal of 96°. Harlingen saw temperatures of 100°F, compared to an average of 94°.

Brownsville also experienced triple-digit heat. No records were broken despite the unseasonably hot day. Further information is available from ValleyCentral.

The heat affected areas across the Rio Grande Valley, with multiple locations reporting high temperatures.