I normally have it around 60C, however it's very hard to measure by describing how it feels, generally I'd say it's just short of scolding. I didn't have gas so no hot water for the whole day today and found it hard. I used a lot more water, stubborn marks took more work to come off and my working day was longer. The sun was splitting the flagstones as well, so plenty of ambient temperature.
There is a big difference between hot and warm. I reckon it equates to at least 2 or 3 average jobs a day.
Simon.