What is the normal amount of precipitation in millimeters?

Normal precipitation is generally 10-49.9 mm.

Precipitation is generally measured as daily rainfall. Among them, light rain means the daily rainfall is less than 10 millimeters; moderate rain means 10 to 24.9 millimeters; heavy rain means 25 to 49.9 millimeters; and heavy rain means 50 to 99.9 millimeters.

Precipitation is generally measured with a rain gauge, so precipitation may contain a small amount of dew, frost, and condensation. In meteorology, there are often precipitation amounts for the year, month, day, 12 hours, 6 hours or even 1 hour. The rain and snow that fell in 6 hours all melt into water, which is called 6-hour precipitation; the rain and snow that fell in 24 hours are all Melted into water, it is called 24-hour precipitation.