Rainfall tercile tables for several locations in the East of the South Island. Data are based on the 30-year period 1971-2000. The ranges for each tercile are: below normal = second lowest to 33rd percentile; near normal = 34th to 66th percentile; above normal = 67th percentile to second highest.
Historical rainfall total (mm) range for forecast area ESI for the 3-month period Mar-Apr-May
| Station Name | No. years | Below Normal | Near Normal | Above Normal |
|---|---|---|---|---|
| KAIKOURA AWS | 30 | 121 - 162 | 162 - 238 | 238 - 508 |
| HANMER FOREST EWS | 27 | 165 - 223 | 223 - 281 | 281 - 491 |
| CULVERDEN | 30 | 82 - 103 | 103 - 177 | 177 - 288 |
| DARFIELD | 30 | 106 - 157 | 157 - 232 | 232 - 339 |
| CHRISTCHURCH AERO | 30 | 88 - 121 | 121 - 177 | 177 - 291 |
| CHRISTCHURCH GARDENS | 30 | 88 - 136 | 136 - 179 | 179 - 297 |
| MT PLEASANT | 23 | 84 - 133 | 133 - 180 | 180 - 279 |
| LINCOLN, BROADFIELD EWS | 30 | 87 - 118 | 118 - 168 | 168 - 264 |
| WINCHMORE EWS | 30 | 97 - 120 | 120 - 198 | 198 - 312 |
| ASHBURTON COUNCIL | 30 | 92 - 126 | 126 - 200 | 200 - 330 |
| PEEL FOREST | 30 | 134 - 183 | 183 - 296 | 296 - 445 |
| LAKE TEKAPO, AIR SAFARIS | 30 | 59 - 124 | 124 - 169 | 169 - 282 |
| WOODBURY | 30 | 107 - 162 | 162 - 296 | 296 - 418 |
| ORARI ESTATE | 30 | 80 - 130 | 130 - 226 | 226 - 336 |
| TIMARU EWS | 30 | 64 - 102 | 102 - 171 | 171 - 282 |
| WAIMATE | 29 | 72 - 113 | 113 - 178 | 178 - 314 |
| IKAWAI | 22 | 56 - 102 | 102 - 173 | 173 - 293 |
| OAMARU AIRPORT AWS | 30 | 72 - 110 | 110 - 187 | 187 - 288 |
| PALMERSTON | 30 | 58 - 112 | 112 - 200 | 200 - 262 |
| TAIAROA HEAD | 30 | 78 - 109 | 109 - 166 | 166 - 254 |
| DUNEDIN, MUSSELBURGH EWS | 29 | 118 - 166 | 166 - 226 | 226 - 310 |
| DUNEDIN AERO AWS | 30 | 115 - 150 | 150 - 203 | 203 - 270 |