In North Texas, the Winter can be as different from the Summer as day is to night.
Shorter days with cooler temperatures means less evaporation so overwatering needs to be avoided. However, your lawn still needs watering as needed.
Place your sprinkler system on ‘Manual’ and periodically use a moisture sensor to check if watering is necessary. While a dormant lawn is still in need of moisture, regularly scheduled watering can overwater your grass causing damage to the root system.
Winter weather varies more so than it does in the Summer months, with wind causing most of the evaporation. Since everyday is not usually windy, it is recommended to apply water on an as needed basis.
Place the probe of your moisture sensor at root level or just below and water only when necessary.
If you are taking an organic approach to your lawn, now is a good time to add Beneficial Nematodes for the control of grubs, fleas, fungus gnats, root weevils, sod worms and other subterranean pests that feed on turf roots.