The best way to combat the cold hose water is to keep a couple of cheap extra hoses on hand. Even the cheap 50' vinyl hoses are good enough and with summer starting to wind down, they can be bought for about $5.00 per hose.

On warm days, connect all the hoses together and ensure that you have a garden hose nozzle or garden wand attached and turned off. Turn the water tap on then lay the hoses streched out on the ground (concrete or asphalt is best) and wait 1/2 an hour or so. The warmth of the sun and ground will heat the water in the hose.

Keep the water tap on very low (just enough to create some pressure). As long as you are not heavy fingered on the hose nozzle, there will now be enough warm water to have a decent shower without getting jolted with cold water.

This is also a good way to have warm water for dishwashing etc.

SD.