Toggle between tabs to see different results breakdowns.
Toggle between ‘Current year’ and ‘Long term’ to see different length summary periods.
Annual total rainfall (mm) at a range of monitoring sites across the region. The shaded areas under the monitoring sites show the long term mean annual rainfall over the entire region.
Usage guide: Drag, scroll, and use the top right +/- buttons on the map to move and zoom to areas of interest. Hover over site circles to see more information and use the selection box on the top left ( ) to subset the table data below to sites in that area.
Sites with greater than 20 percent difference from their long-term average have table rows shaded orange (below average) or blue (above average). Click on sites in the table to highlight them on the map, and click on headers or the arrows next to them to sort the data by that column – holding the shift key allows sorting over multiple columns.
Annual total rainfall (mm) at a number of sites are shown against the site average total (black line). Years when recorded rainfall was above average are coloured orange while years with below average rainfall are blue. Hover over charts to see specific values and click on legend entries to show/hide that series.
Kāpiti Coast
Te Awarua-o-Porirua
Te Whanganui-a-Tara
Ruamāhanga
Wairarapa Coast
Monthly rainfall totals at a number of rainfall monitoring sites compared to the previous year and the long-term monthly average/range. Hover over charts to see specific values and click on legend entries to show/hide that series.
Kāpiti Coast
Te Awarua-o-Porirua
Te Whanganui-a-Tara
Ruamāhanga
Wairarapa Coast
The cumulative monthly rainfall for 2022/23 at a number of rainfall monitoring sites is compared to the previous year and the long-term average. Hover over charts to see specific values and click on legend entries to show/hide that series.
Kāpiti Coast
Te Awarua-o-Porirua
Te Whanganui-a-Tara
Ruamāhanga
Wairarapa Coast
Seasonal rainfall totals for monitoring sites are presented below. Those sites that have a greater than 20 percent difference from their long-term seasonal average are shaded orange (below average) or blue (above average). Click on table headers or the arrows next to them to sort the data by that column – holding the shift key allows sorting over multiple columns.
The highest and lowest recorded rainfall totals throughout the year at various monitoring sites have been assigned estimated return periods based on frequency analysis of long term recorded data (see NIWA’s HIRDS V4 for more information). Blue shaded values indicate a rainfall total with a 5-year return period or greater.
Note that for all frequency analysis results (rainfall and flows) a return period expressed as 100 years can be assigned a probability of occurring being 1/100, or 1% in any one year. Similarly, a 5-year return period event equates to 1/5 or a 20% chance of occurring in any one year.
Toggle between ‘Short duration’ and ‘Long duration’ to see different length summary periods and click on table headers or the arrows next to them to sort the data by that column – holding the shift key allows sorting over multiple columns.
Minimum total rainfalls over periods of 14, 28, and 90 days. Click on table headers or the arrows next to them to sort the data by that column – holding the shift key allows sorting over multiple columns.