Linn, Texas is a small unincorporated community located in Hidalgo County. The climate in Linn is typically warm and semi-arid, characterized by hot summers and mild winters. Summers can be quite hot, with temperatures often reaching into the high 90s°F (mid-30s°C), while winters are generally mild, with average temperatures in the low 60s°F (around 15°C).

Hydrologically, Linn is in close proximity to the Rio Grande, which serves as a major water source for the region. This river is significant to both the local community and the wildlife in the area. The surrounding landscape is mainly agricultural, with farming being a prominent activity.

For outdoor recreation enthusiasts, Linn offers a few opportunities. The nearby Lower Rio Grande Valley National Wildlife Refuge provides nature lovers with the chance to explore diverse ecosystems and observe a variety of wildlife. The refuge offers trails for hiking and birdwatching, making it an ideal destination for outdoor enthusiasts. Additionally, the region is known for its birding opportunities, attracting birdwatchers from around the world who visit the area to spot rare and unique bird species.