Things will be flattened
Most places in the Eastern US will see an inch of rain in a day at least once a year, and often as much as two inches. Here is last May in DC, where we got 1.24 inches (31 mm) on 5/2.
31 mm is a lot different from 0.8 mm. That means that every square meter of surface area will get hit with 31 kg of rainwater. Even if your body's upwards facing surface area is 0.1 m$^2$, you will still be hit with a 3 kg weight at terminal velocity. Ouch. But its worse for your house. Your 150 m$^2$ of roof just got hit with two tons of water, also at terminal velocity. Housing insurance will cost more in this world, to say the least.
Loose soil will be churned up and run off. Leaves will be stripped from trees. Grass and flowers will be crushed. The falling sheet of water will destroy all flying bugs.
In short, this would be a bad thing, and neither plants nor human infrastructure would exist as we know it.