Almost a month's worth of rain hit the capital on Friday, in the wettest day of 2017.
While forecasters had originally expected half a month's rain to fall across both Friday and Saturday, the skies had other ideas, dumping about 33 millimetres on Canberra's city centre and up to 88mm in the west near Mount Ginini overnight.
Bureau of Meteorology forecaster Helen Reid said Friday's soaking was something of a "one hit wonder", as the weather system moved more quickly than anticipated.
"It's a good amount to have in one night," she said.
"The city itself got about a month's rain during that 24 hour period from 9am Friday to 9am [Saturday] and, when it happens all in one night, it feels like a soaking."
Canberra's average total rainfall for May is 44.4mm.
The downpour arrived as part of a low pressure system sweeping across eastern Australia, which also soaked parts of New South Wales and Queensland.
On Friday afternoon, emergency crews in Queanbeyan prepared sand bags ahead of the downpour.
But, by Saturday morning, the sun was shining in Canberra.
Ms Reid said skies were now looking clear for the rest of the weekend.
"The system that brought all that rain last night has cleared away," Ms Reid said.
"Canberra's not expecting much more, there may be a few showers lingering but tomorrow will have no rain nor Monday."
Saturday and Sunday were both expected to reach a top of 18, before a weak band of rain crept back overhead on Wednesday.
The capital's wettest May day on record saw about 95mm fall in 1948.
