Water storage levels dipped below 50 percent this month for the first time in 25 years.
Watercare chief executive Raveen Jaduram said the weekend's rainfall only lifted water storage levels by 0.7 percent - effectively buying the city two days worth of water usage.
About 20mm fell in the Waitākeres and just under 60mm fell in the Hunua Ranges.
Jaduram said the region was still in a severe drought and Aucklanders must continue to conserve water or risk driving the city to water restrictions.
Photo: Supplied / Watercare Caption: The water level is low in the creek leading into Upper Nihotupu Dam in the Waitākere ranges.