1) Water in the Morning
If watering is necessary, water in the morning to reduce evaporation from the hot summer sun. Watering in the afternoon will lose more water and creates the ideal conditions for fungal diseases: hot and humid.
2) Water deeply and less often
Watering the soil deeply when you water will keep more water in the soil longer. It also encourages roots to grow down deep in search of that water, longer roots means stronger plants.When you water frequently the roots don't have to grow deep into the soil to get water so they remain in the upper layers which makes a weaker root system.
3) Consider purchasing and using rain barrels.
4) Mulching
Mulching your gardens with a good layer of mulch (about 2 inches) will keep the soil cooler and retain much more moisture in the soil. Last Thursday I moved a plant to a new garden and dug into the soil underneath the mulched garden bed and found moisture, after almost two weeks of no rain. It's almost like striking oil for the gardener!
5) Soaker Hoses not sprinklers
When you water use soaker hoses to keep the moisture on the ground. Sprinklers send water up into the air which increases evaporation and results in the plants receiving less water while you receive a higher water bill. Soaker hoses aren't practical for watering lawns but unless you are starting new seed you really should go easy on watering the lawn. Covering the soaker hose with mulch also helps to increase the amount of moisture retained in the soil.
Hopefully rain will be plentiful this summer, but one thing is for sure, you can never count on the weather to do what you want!
(click on the pictures above to visit Gardener's Supply Company)