Rainfall Intensity
Rainfall Intensity by Locality (mm/hr)
| Locality | Average recurrence internal, once in: |
|
| 20 years * | 100 years ** |
|
| ACT | ||
| Canberra | 137 | 194 |
| SA | ||
| Adelaide | 123 | 186 |
| Arkaroola | 134 | 194 |
| Ceduna | 125 | 200 |
| Mt. Barker | 120 | 184 |
| Mt. Gambier | 108 | 168 |
| Murray Bridge | 117 | 181 |
| Nuriootpa | 111 | 164 |
| Port Augusta | 124 | 189 |
| Port Pirie | 125 | 201 |
| Yorketown | 118 | 197 |
| VIC | ||
| Bacchus Marsh | 126 | 189 |
| Ballarat | 127 | 184 |
| Benalla | 133 | 187 |
| Geelong | 118 | 172 |
| Hamilton | 120 | 184 |
| Healesville | 129 | 192 |
| Horsham | 120 | 174 |
| Korumburra | 116 | 168 |
| Lakes Entrance | 124 | 179 |
| Melbourne | 127 | 186 |
| Mildura | 125 | 174 |
| Morwell | 129 | 196 |
| Orbost | 130 | 188 |
| Stawell | 127 | 185 |
| Wonthaggi | 114 | 165 |
| QLD | ||
| Biloela | 220 | 298 |
| Brisbane | 251 | 333 |
| Bundaberg | 241 | 318 |
| Cairns | 282 | 368 |
| Cape York | 301 | 388 |
| Charleville | 170 | 236 |
| Charters Towers | 218 | 285 |
| Cloncurry | 172 | 228 |
| Emerald | 220 | 289 |
| Goondiwindi | 182 | 246 |
| Gympie | 228 | 299 |
| Hughenden | 199 | 266 |
| Innisfail | 254 | 323 |
| Kingaroy | 208 | 279 |
| Longreach | 189 | 251 |
| Mackay | 273 | 363 |
| Mareeba | 219 | 290 |
| Mt Isa | 169 | 223 |
| Mt Morgan | 225 | 300 |
| Noosa | 253 | 320 |
| Posperpine | 272 | 356 |
| Rockhampton | 248 | 336 |
| Roma | 192 | 358 |
| Southport | 246 | 308 |
| Toowoomba | 189 | 251 |
| Townsville | 260 | 346 |
| Warwick | 178 | 240 |
| Weipa | 293 | 370 |
| TAS | ||
| Bridgewater | 101 | 156 |
| Burnie | 118 | 191 |
| Deloraine | 108 | 165 |
| Dover | 97 | 165 |
| Flinders Island | 128 | 184 |
| Hobart | 99 | 155 |
| Kingston | 98 | 154 |
| Launceston | 101 | 150 |
| Mt Wellington | 122 | 191 |
| New Norfolk | 100 | 166 |
| Queenstown | 118 | 183 |
| Scottsdale | 119 | 190 |
| Sorell | 101 | 152 |
| St. Helens | 131 | 185 |
| St. Marys | 205 | 266 |
| WA | ||
| Abydos | 199 | 275 |
| Albany | 142 | 217 |
| Broome | 252 | 343 |
| Bunbury | 148 | 215 |
| Carnarvon | 142 | 196 |
| Collie | 145 | 217 |
| Dampier | 231 | 337 |
| Derby | 254 | 343 |
| Geraldton | 132 | 173 |
| Halls Creek | 181 | 237 |
| Hamersley | 180 | 244 |
| Hillside | 192 | 265 |
| Kalgoorlie | 116 | 180 |
| Katanning | 125 | 203 |
| Kununurra | 256 | 347 |
| Marble Bar | 205 | 287 |
| Meekatharra | 111 | 155 |
| Mundaring | 139 | 204 |
| Newman | 143 | 195 |
| Perth | 146 | 214 |
| Port Hedland | 233 | 332 |
| Roy Hill | 160 | 216 |
| Tom Price | 164 | 222 |
| Wittenoom | 182 | 245 |
| NT | ||
| Alice Springs | 139 | 204 |
| Darwin | 285 | 366 |
| Katherine | 230 | 304 |
| NSW | ||
| Albury | 135 | 191 |
| Armidale | 154 | 219 |
| Batesmans Bay | 211 | 279 |
| Bathurst | 143 | 197 |
| Bowral | 170 | 225 |
| Broken Hill | 130 | 181 |
| Casino | 198 | 256 |
| Coffs Harbour | 232 | 293 |
| Cooma | 129 | 183 |
| Coonabarabran | 178 | 247 |
| Cowra | 144 | 203 |
| Dorrigo | 214 | 273 |
| Dubbo | 159 | 221 |
| Forbes | 151 | 209 |
| Glen Innes | 159 | 219 |
| Gosford | 189 | 240 |
| Goulburn | 145 | 197 |
| Inverell | 179 | 251 |
| Kempsey | 220 | 283 |
| Kiama | 224 | 283 |
| Lismore | 219 | 278 |
| Lithgow | 141 | 191 |
| Maitland | 169 | 224 |
| Merimbula | 207 | 278 |
| Mittagong | 172 | 277 |
| Mullumbimby | 250 | 315 |
| Murwillumbah | 244 | 302 |
| Muswellbrook | 141 | 195 |
| Newcastle | 181 | 233 |
| Nowra | 219 | 280 |
| Orange | 152 | 214 |
| Penrith | 166 | 220 |
| Port Macquarie | 223 | 290 |
| Robertson | 228 | 297 |
| Singleton | 148 | 199 |
| Sydney | 214 | 273 |
| Taree | 190 | 241 |
| Tweed Heads | 245 | 303 |
| Wollongong | 233 | 294 |
| Wyong | 186 | 240 |
*Minimum for eaves gutters.
**Minimum for internal box and valley gutters.
Notes:
Data for other locations may be obtained from local drainage authorities. Data for any locality in Australia (to a resolution of 1/40th of a degree of latitude or longitude) may be obtained from the Bureau of Meteorology.
Data shown for large cities are the maxima within the greater city area. Data for specific locations within these areas may be obtained from the Bureau of Meteorology.
More stringent requirements should be considered for buildings where the avoidance of gutter overflow is of paramount importance.
All gutters and outlets, particularly box gutters served by internal sumps, need to be regularly inspected and maintained to avoid breakages.
The data relates to a storm of five minutes duration and an average recurrence interval of one in 20 years for eaves gutters and one in 100 years for valley and internal box gutters, based on Australian Rainfall and Runoff (1987) published by Engineers Australia.