Whether you find it annoying or a bonus, rainfall during the summer months can be useful in the garden. ‘A moderate rainfall will give the ground 0.2 of an inch of water per hour,' says Stacie Smith, owner of lawn care specialists Smithson Exteriors. 'So, if you get 6-7 hours of rain per week, you might not need to water your lawn at all for either warm or cool season grasses.’ She also adds, ‘It is better to water deeply and infrequently than it is to water daily.’