There have been no rain the last month and it's now illegal to water the lawn. It's been a week since I last watered the lawn, and the long-term forecast predicts no rain the coming two weeks.

I live in a place where it normally rains a lot. May is usually the driest month with about 13 rainy days and 100 mm total precipitation. It was no rain at all this May. The average daily maximum temperature in May is normally about 15-20 oC. The last two weeks however it's been about 26-30 oC. All weather records have been shattered this year. 

The soil isn't deep (I don't know exactly how deep), and the lawn is just one year old. The grass is cold season grass.

Should I mow the lawn, or it's it better to leave it alone during the drought?