The Dallam/Hartley bi-county area is blessed with a mild climate. Average daytime high in the winter is about 55 degrees, while in the summer the average daytime high is a dry 85 degrees with nights cooling to the 60s. Winds are south to southwesterly most of the year. In the winter, northerly winds predominate. Average annual rainfall is 18 inches, which includes 10-12 inches of snowfall during the winter. The growing season lasts approximately 178 days, with the average last frost on April 23 and the average first frost on October 18.

Dalhart, its name a combination of the two counties in which it lies, was briefly known as Twist Junction and then as Denrock. Dalhart was first incorporated in 1902.

The XIT Ranch, no longer in existence, consisted of 3 million acres, which the Texas state government deeded to an investment group in Chicago in exchange for building the Texas State Capitol in 1888.

The Texas AgriLife Extension Service in Dallam & Hartley counties strives to serve a population who derives its main income from production agriculture mainly wheat, corn, cattle, and swine.

Mission: To provide quality, relevant outreach and continuing education programs and services to the people of Dallam County.