Why water before 8 a.m. or
after 8 p.m?
Watering when it is dark out, can reduce water wasted from evaporation by as much as 50 percent! Imaging pouring--and paying for--100 gallons of water on your lawn and half of it literally goes up in the air. Between 8 p.m. and 8 a.m., there are lower temperatures, less solar radiation, less wind and more humidity, making it the most efficient time to irrigate. Because of Colorado's semi-arid environment, there generally aren't issues with mold or fungus when watering at night. This does mean, however, that you will have to take the time to periodically check your system during the day to ensure there aren't any broken or misaligned heads. As long as you are physically present during daytime maintenance, this won't be considered watering during the day.