Question: 2 mm of rain is how much?
Answer: Moderate rain — when the precipitation rate is between 2.5 mm (0.098 in) - 7.6 mm (0.30 in) or 10 mm (0.39 in) per hour. Heavy rain — when the precipitation rate is > 7.6 mm (0.30 in) per hour,[105]or between 10 mm (0.39 in) and 50 mm (2.0 in) per hour.