In August, Harlingen typically sees daytime highs of 34.6°C and overnight lows around 24.1°C. Compared to the annual average high of 28.5°C, August runs +6.1°C.
August in Harlingen averages a daytime high of 34.6°C and an overnight low of 24.1°C.
August runs +6.1°C compared to Harlingen's annual average high of 28.5°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 34.6°C and cooler evenings around 24.1°C.