Mercedes Weather Forecast
- 77
- 99
Hot
- 77
- 100
Hot
- 79
- 100
Hot
- 78
- 101
Hot
- 79
- 101
Hot
- 79
- 99
Hot
Today 30 Jul Southern Hidalgo
Mostly sunny. Hot with Highs around 100. Southeast Winds 5 to 10 Mph. Heat index Values up to 107 this afternoon.
Tonight 30 Jul Southern Hidalgo
Partly cloudy. Lows in the upper 70s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Heat index Values up to 106 early in the evening.
Mercedes Temperature Statistics
July Temperature
Harlingen, Rio Grande Valley International Airport (16.8 miles)
Lowest 17 July, 2025
71.7 °FAverage July
85.8 °FHighest 24 July, 2025
100.7 °F
Climate (2020–Present)
Harlingen, Rio Grande Valley International Airport (16.8 miles)
Average Low 2020–2025
65.4 °FAverage 2020–2025
75.2 °FAverage High 2020–2025
86 °F