Increase nozzle size. Spray when wind is less than 10 mph. Spray when wind is moving away from sensitive crops. Do not spray when air is VERY calm. Use a drift control additive when needed.
Timely rainfall is a blessing in agricultural and horticultural cropping systems.
However, the homeowners are not dumb, and should exercise their intelligence to shut their systems off during any rainy period. Running the stationary heads for just 1 hour will deliver 1 inch of water, while running the rotary heads for 1 hour will deliver about 0.3 to 0.4 inch of water. This terminology often fails to communicate just how much water this is to the average user. For every 1000 square feet of turf or other area irrigated in this fashion, figure about 624 gallons for each inch of water. That's almost 5,000 gallons of water for the average lawn of 8,000 square feet.