Classify

Rain per hour

Daily Rainfall

Monthly Rainfall

Very Light

<1 mm/hour

<5 mm/24 hours

0 - 50 mm

Light

1 - 5 mm/hour

5 - 20 mm/24 hours

50 - 100 mm

Moderate

5 - 10 mm/hour

21 - 50 mm/24 hours

100 - 300 mm

Heavy

10 - 20 mm/hour

50 - 100 mm/24 hours

300 - 500 mm

Very Heavy

>20 mm/hour

>100 mm/24 hours

>500 mm