The city picked up a whopping 154mm throughout the month, significantly above the long-term normal of 28mm.

This made it the wettest April since records began at the current site in 1993.

The wet weather was not just restricted to Perth with many parts of Western Australia receiving very unseasonal rain during April.

The exception was eastern and northern parts of the state, which came in below average.

The Central Wheatbelt was one of the districts that fared the best, with many towns receiving up to four times the average April rainfall.

For example, Northam received 99mm, its highest total for April in 128 years of records.

"Western Australia benefited from a number of upper level troughs throughout April," meteorologist Matt Pearce said.

"These combined with warm waters in the eastern Indian Ocean to generate persistent rain and storms across western parts of the State."

It was a cool month across the state’s southwest.

Perth had an average maximum of 24 degrees, below the long-term normal of 26. This made it the coolest April in terms of daytime temperatures since 2006.

In fact, on the 19th and 21st, the city reached just 19 degrees. These were the coldest April days since 2006.

The nights were also chilly. Perth’s average minimum of 13 degrees was slightly below the long-term normal of 14.

However, there were a couple of warm nights at the start of the month. For example, on the morning of the 8th, the temperature did not fall below 19 degrees, making it the warmest April night in four years.

When both daytime and overnight temperatures were combined, Perth’s average temperature came in at 18 degrees, below the long-term normal of 20. This made it the coldest April since 2006.

"Temperatures are likely to remain slightly lower than normal over the next few months. We should also see a continuation of above average rainfall, thanks to the warm waters off our west coast. This bodes well for Perth’s water storage situation as we head into winter," Mr Pearce said.

SOURCE: Weatherzone