Canberra had a warm and wet start to winter this year, with rainy days and mild nights making it the ACT's hottest June since 2009 and the territory's eighth warmest on record.
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But a severe cold front has started this month off on a chilly note, with a number of rural roads closed due to wet conditions.
The average minimum temperature for the past month was 2.8 degrees, well above June's 1-degree minimum average. The ACT had an average maximum of 13 degrees.
Rainfall was also higher than average in June, with 57 millimetres falling across the territory during the month compared to an average of just 41 millimetres.
Weatherzone meteorologist Rob Sharpe said if the strong cold fronts hadn't come through towards the end of last month, it would have been a very warm June overall.
"In the last week of June, maximum temperatures averaged about 10 to 11 degrees for the last week and a bit of June, which definitely brought the temperature down," he said.
The combined average temperatures for the past month were only 0.01 degrees lower than June 2009, the seventh hottest on record. But the streak of warm weather has finished, with Tuesday's minimum of minus 3.1 degrees Canberra's coldest temperature for the year so far.
Mr Sharpe said there would be a couple of mornings of about minus 3 degrees over the next few days, with tops of 11 degrees on the weekend.
He said a cold front would move through the territory on Saturday, bringing frost and showers.
"It won't be nearly as strong as the recent cold front. Wind won't get nearly that strong and daytime temperatures will be cold but not as cold as the past week," Mr Sharpe said.
The recent cold front has forced the ACT government to close several rural roads, including parts of Corin Road and Bendora Dam Road.
A spokesman for the government said Mount Franklin Road at Piccadilly Circus and Orroral Ridge Road were closed, while Brindabella Road and Booroomba Rocks Road remained open.
He said Corin Forest could be accessed via Corin Road off Tidbinbilla Road but reminded motorists a sudden change in conditions could make some roads impassible.
"The Corin Forest mountain recreation area is the best and safest opportunity for Canberrans to enjoy the snow in the ACT," the spokesman said.