How much watering does my San Diego lawn need?

You may want to start by checking with your town’s regulations due to the ongoing drought California and the Southwest has been dealing with. Whenever we have a drought her in the Midatlantic states, they limit how often we can use water for watering the lawn or washing cars, etc.

I lived in SD for a long time and if you are actually IN San Diego, near the beach or slightly inland, Claremont area, etc. you should probably be able to water 3x a week, maybe Mon. Weds. Fri./Sat. for about 10–15 minutes a section. General rule, if the temps. are 90 or below ( which 90 is pushing it for SD ) the 3x per week should be fine. Anthing over 90 you may need to ramp it up a bit.
Yes to what @hearkat said. Since CA. is in a drought, check with your city/neighbors for any watering restrictions.

I am up here in NorCal and it gets pretty hot, we are on a 3 day a week watering schedule based on odd/even address.

@Coloma – how many minutes a day? My lawn needs 15 min, but maybe because I have only one head going?

@ RocektGuy
I’d say 15–20 depending on the temps. Under 90 15, over 90, 20. Heh..the irony, it is 11 P.M. here and I am frantically watering after being out of town all day. Jesus..I am so tired, but the grass must stay green. lol

I know! We converted our front lawn to “drought-tolerant” so that I wouldn’t be paying to keep up a green lawn for neighborhood dogs to pee on.