Texline is a small town located in the Northwest corner of Dallam County, Texas. The climate in Texline is classified as semi-arid, with hot summers and mild winters. Summers can be quite hot, with temperatures averaging in the mid-90s Fahrenheit, while winters are relatively mild, averaging in the mid-40s Fahrenheit. The region experiences low levels of precipitation, with an average annual rainfall of around 17 inches.

Hydrology in Texline primarily consists of the underground Ogallala Aquifer, which provides water for agricultural and domestic use. The constituents of the aquifer include calcium, magnesium, sodium, and bicarbonate, resulting in hard water.

Outdoor recreation opportunities in Texline are centered around the town's natural surroundings. Nearby Lake Rita Blanca State Park offers activities such as fishing, boating, and camping. The park is home to a variety of wildlife, making it a popular spot for birdwatching and nature photography. Hiking and biking trails can also be found in the surrounding area, allowing visitors to explore the beautiful landscapes of Texline.