The average annual temperature gradually increases from about 52°F in the northern Panhandle of Texas to about 68°F in the Lower Rio Grande Valley, except for isolated mountainous areas of far west Texas, where temperatures are cooler than the surrounding arid valleys and basins. In Far West Texas, the average annual temperature sharply increases from about 56°F in the Davis and Guadalupe mountains to about 64°F in the Presidio and Big Bend areas.
Explore the previous year's temperature data in the following slides to learn more about these variations.