United States point rain rate distribution values (mm/hour) versus percent of year rain rate is exceeded.  Information is from work done by Robert K. Crane.

Percent of Year               Rain Climate Region

                              B      C      D1      D2      D3      E      F

0.0010 (5 min)                54.0   80.0   90.0    102.0   127.0   164.0  66.0
0.0020 (11 min)               40.0   62.0   72.0    86.0    107.0   144.0  51.0
0.0050 (26 min)               26.0   41.0   50.0    64.0    81.0    117.0  34.0
0.0100 (1 hrs)                19.0   28.0   37.0    49.0    63.0    98.0   23.0
0.0200 (1.8 hrs)              14.0   18.0   27.0    35.0    48.0    77.0   14.0
0.0500 (4 hrs)                 9.5   11.0   16.0    22.0    31.0    52.0    8.0
0.1000 (9 hrs)                 6.8    7.2   11.0    15.0    22.0    35.0    5.5
0.2000 (18 hrs)                4.8    4.8    7.5     9.5    14.0    21.0    3.2
0.5000 (44 hrs)                2.7    2.8    4.0     5.2     7.0    8.5     1.2
1.0000 (88 hrs)                1.8    1.9    2.2     3.0     4.0    4.0     0.8
2.0000 (175 hrs)               1.2    1.2    1.3     1.8     2.5    2.0     0.4

Notes

• Drizzle = 0.25 mm/hour
• Light rain = 1.0 mm/hour
• Moderate rain = 4.0 mm/hour
• Heavy rain = 16.0 mm/hour
• Thunderstorm = 35.0 mm/hour
• Intense thunderstorm = 100.0 mm/hour
• Region B = Polar taiga (moderate)
• Region C = Temerate maritime
• Region D1 = Temperate continental (dry)
• Region D2 = Temperate continental (mid)
• Region D3 = Temperate continental (wet)
• Region E = Sub-tropical (wet)
• Region F = Sub-tropical (arid)