Purchase a patio mister kit. Patio mister kits consist of pressure hoses, nozzle tees, clamps, nozzles and a water faucet hook-up or spigot.
Consider purchasing a high-pressure mist system with a pump for optional cooling. The pump increases water pressure and produces tiny drops of water. The super small drops of water cool areas more effectively. Remember that all patio misters drip a little bit. To avoid having drops of water falling on you, don't put patio furniture directly beneath misters.
Visit online outlets like Big Fogg and Aeromist or visit local home improvement stores, such as Lowes and Home Dept, to purchase patio misters (see Resources below). Speak to sales associates for installation tips.