| Index | Long name | Definition | Units |
| RX1 day | Max 1-day precipitation amount | Monthly maximum 1-day precipitation | mm |
| RX5 day | Max 5-day precipitation amount | Monthly maximum consecutive 5-day precipitation | mm |
| SDII | Simple daily intensity index | Annual total precipitation divided by number of wet days (defined as PRCP ≥ 1.0 mm) in the year | mmd−1 |
| R10 | Number of heavy precipitation days | Annual count of days when PRCP ≥ 10 mm | Days |
| R20 | Number of very heavy precipitation days | Annual count of days when PRCP ≥ 20 mm | Days |
| CDD | Consecutive dry days | Maximum number of consecutive days with PRCP < 1 mm | Days |
| CWD | Consecutive wet days | Maximum number of consecutive days with PRCP ≥ 1 mm | Days |
| R95p | Very wet days | Annual total PRCP when PRCP > 95th percentile | mm |
| R99p | Extremely wet days | Annual total PRCP when PRCP > 99th percentile | mm |
| PRCPTOT | Annual total wet-day precipitation | Annual total PRCP in wet days (PRCP ≥ 1 mm) | mm |