I haven't actually taken a ruler to it, but my back lawn has definitely needed mowing twice/week this month after all the rain.  My front lawn isn't growing that fast though.  In June/July when we got almost zero rain, I was barely mowing every 10 days.

When I saw multiple days of rain in the forecast for early Aug, I did a light fertilizing just before it too.  That helped as well. Looks way better than it has all year.

I have a battery-powered mower, set to mulch.  It'll bog down too much and leave clumps if I try to cut too much at once.  I'm probably cutting about 1.5"-2" each time.