Climate
The County Has a Subtropical Climate With Intense Summer Heat
Hidalgo County has a subtropical climate with July highs near 96°F, about 23 inches of annual rain, and a risk of severe tropical weather.
Average January lows are around 47°F, while July averages reach about 96°F. Annual rainfall is roughly 23 inches, most of it falling in the summer and fall. The county is inland from the Gulf but still in the path of tropical storms moving up from the Gulf of Mexico.
Heat is a serious health hazard here from May through September. If you are new to the region, plan outdoor work and activity for the early morning. Check the National Weather Service forecast office for current conditions and heat advisories.
Source to confirm: Handbook of Texas – Hidalgo County