The Office of the Texas State Climatologist (OSC) is housed in the Department of Atmospheric Sciences, College of Geosciences, Texas A&M University. The OSC serves as a clearinghouse for climate information for the state of Texas. The OSC issues regular climate updates and conducts research on climate monitoring and climate prediction in Texas and the southern United States. The OSC is an AASC-Recognized State Climate Office. The OSC receives its base funding from Texas A&M University.

The State Climatologist is Prof. John Nielsen-Gammon. Nielsen-Gammon became State Climatologist in 2000 following the retirement of John Griffiths. Also affiliated with OSC are research associates Brent McRoberts, David Coates, and Matthew Raper and undergraduate Andrew Cook.

Currently active research projects include the development of tools to better monitor rapidly-changing drought conditions at the county scale, a study of the effect of weather and climate on the range of a tick that serves as a livestock disease vector, and the development of a drought forecasting tool to assist decision-making for farmers and ranchers.