The ACT State Emergency Service received more than 60 calls for help on Thursday night as a result of the wet weather.
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In the evening, the Calvary Hospital Child Care Centre in Bruce flooded and the roof leaked at the Belconnen Basketball Stadium due to a blocked drain.
The basketball was called off, as was the baseball at Narrabundah Ballpark between the Canberra Cavalry and the Sydney Blue Sox.
Heavy rainfall also affected audio visual exhibits at the Australian War Memorial's Anzac Hall. The lower level of the hall was closed while it was assessed for water damage.
Canberra's rainy start to the wettest month of the year is set to continue with showers forecast for Friday before a drier weekend.
Weatherzone meteorologist Guy Dixon said there was a common misconception that the winter months brought the most rain when, in fact, November topped the year's monthly average rainfall.
"This is largely put down to an increase in thunderstorm activity at this time of year," he said.
"November is within a transition period between the depths of winter and the heights of summer. Even if the rainfall isn't particularly heavy it contributes to larger totals for the month."
Mr Dixon said November in south-eastern Australia was dubbed "thunderstorm season".
The reason more rain fell into gauges across Canberra at this time of year came down to more moisture in the atmosphere.
"The synoptic system is set up so we see low pressure troughs rather than the cold fronts we get during winter," he said.
"More moisture from the tropical air filters through during the warmer months [so] the atmosphere is more moisture-laden during the transition months [like November]."
In contrast, winter air masses were drier, bringing lighter rainfall between June and August.
Weatherzone meteorologist Rob Sharpe said November's average total rainfall was 65 millimetres compared to an average 41 millimetres in June and July.
Mr Sharpe expected a further 10 to 20 millimetres of rain to fall across Canberra before the weekend, with any storms bringing heavier falls.
He said 24 millimetres had already been recorded at Canberra International Airport since November 1, as of Thursday morning – about a third of the month's average rain.
Thursday morning was a case in point with 2 millimetres falling by 9am.
At 7pm on Thursday the Bureau of Meteorology warned storms in the ACT could produce heavy rainfall that may lead to flash flooding and damaging winds throughout the evening.
The warning was also given to areas in NSW, including Lismore, Tenterfield, Kyogle, Orange, Mudgee, Bathurst, Dubbo and Wellington.
The wet weather follows an electric beginning to the week with thunder, lightning and rain rattling the nation's capital, with an average of 18 lightning strikes a minute hitting the region on Sunday.
Mr Sharpe said the sombre weather was set to continue on Friday.
Meanwhile, cloud cover will keep temperatures relatively low with a forecast top of 23 degrees.
"As a whole [Friday] will be a drier day," he said.
"There will probably be a bit of sunshine at first – mostly cloudy but a touch of sunshine."
Mr Sharpe said the weekend would be much drier with temperatures forecast to reach 21 degrees on Saturday and 23 degrees on Sunday.
"Each day is going to be partly cloudy, with a bit of sun and a bit of cloud," he said.
"There is a chance of a shower Saturday morning."
Canberrans have managed to snap some stunning photographs between springtime showers, including Carol Elvin's photograph of a pink cloud formation above Lake Burley Griffin.
"I hurried to the lake to catch this shot after noticing the beautiful cloud formation while out walking," the Yarralumla resident said.
"It lasted only a couple of minutes but was worth the dash.
"Catching this moment felt like a good omen as my daughter had a beautiful wedding featuring pinks and creams just a few days later."
