The service provides access to the database maintained by the New Zealand national government of climate information. Data come from weather condition readings over time logged by approximately 6500 climate stations operating at various times since 1850. Over 600 stations currently contribute data.
API methods supply both raw data and statistical summaries by station and for specific time periods. Raw data provide readings on key climatic measures with several frequencies: 10 minutes, hourly, and daily. Summary statistics aggregate readings by month and year and calculate estimates of normal levels for six readings over 30-year spans.