Hamilton received more rainfall this morning than in all of March.
Hamilton Airport recorded 8 millimetres of rain today compared with just 6mm last month, MetService meteorologist Dan Corbett said.
The morning's dousing led to reports of minor flooding in River Rd.
Corbett said there would be isolated showers in much of Waikato today, with thunderstorms in the Coromandel Peninsula.
"Showers will be passing through today and [there] might be a few tomorrow."
The region's dry spell has led some farmers to make unofficial pronouncements of drought. In recent days, tighter water restrictions have been introduced in three Waikato towns.
"It's been very, very dry for March for the central and western parts of Waikato," Corbett said.
"You could count the [millimetres of] rainfall on two hands."
A "big fat high" would drift away from the country in the next couple of days, leaving the door open for new weather systems, Corbett said.
MetService said a low to the east of the North Island would bring wet weather to eastern areas, but western districts, from Waikato to Taumaranui, would miss out on showers.
Meanwhile, more dry weather and below average temperatures could be on the way for Waikato in autumn.
The National Institute of Water and Atmospheric Research (Niwa) released its seasonal climate outlook for April to June yesterday, predicting normal to below normal rainfall and average to below average temperatures for Waikato, Northland, Auckland and Bay of Plenty.
The report also tipped cold snaps and frosts for many parts of the country as autumn progressed.
While eastern parts of the country could expect near average temperatures, normal or below normal temperatures were predicted for the north and west of both islands.
Soil moisture levels and river flows were most likely to be below normal in Waikato, Niwa said.