While it may seem that you can water your lawn at any time, that is not the case, and doing so can cost you a lot of money while still leaving you with a less than pristine lawn. Water it too much and you can end up with rotten grass, water it too little and you will end up with brown grass. The same can be said of watering your lawn when it is too hot and when it is too cold.
The absolute best time to water your garden is in the morning, starting around the time that the sun rises, and stopping before the sun fully reaches its zenith or highest point. In most cases this means from around 5:30 am to 10:30 am. This watering time period will make sure that the grass is kept cool and nourished in the heat of the day, while at the same time not allowing water to cause root rot or other issues overnight.
If you find that you are unable to water in the early morning, you must at all cost avoid watering during mid day. Any time after 10:30 am and up until almost 5:00 pm should be avoided as you will cook your grass, lose a large amount of water to evaporation, and may end up spending a lot more money to get the results you need. Even if you find that you have time during your lunch break, you should avoid trying to water during these times and should instead push yourself to be patient.
The second best time for you to water your garden is actually from around 5pm to 7pm in the evening. This is the time when the sun is setting, but when it has not completely disappeared. The area that you are watering should still have to hace sunlight, and the temperature should not be decreasing. Watering at this time may cause some evaporation before the water gets to the roots but it will not cause any damage, and is less wasteful than watering during the late evening into the night.
Overall, knowing when to water will save you time, save you money, and help keep your lawn look green while everyone else struggles to keep theirs in good condition. Keeping this in mind, always ensure that you are not flooding an area, watering too lightly, or causing damage with sprinklers that are set too high. Checking once a month if you have automated sprinklers will keep these problems from occurring. If you think that your sprinkler system is not properly working then contact a local irrigation company for a quick check up and repair.