One important factor to consider is how much water your lawn needs. In general, there is a best time of day to water depending on the type of grass that you have. Cool season grasses, such as bluegrass and fescue, should be watered at night. Warm season grasses, such as Bermuda or zoysia, can tolerate being watered in the morning or evening.
To determine how much water your lawn needs, you can use a soil moisture meter to test the moisture level in your soil. Once you know how much water your lawn needs, you can then begin to think about what time of day best suits your schedule and watering needs.
Another thing to keep in mind when deciding when to water your lawn is the weather. If it is hot and sunny, it is best to water in the morning or evening when it is cooler. If it is raining, you don't need to water your lawn.