Melburnians may be wondering where summer has gone after the city sulked through its coldest January in more than 10 years.

Victoria's capital recorded an average maximum temperature of 25.9 degrees for the month, making it the coldest January since 2004 despite being in line with the long-term average.

"We've had quite hot Januarys recently; they've been averaging 27, 28, nearly 29 degrees over the last decade," Bureau of Meteorology senior forecaster Richard Carlyon said.

Mr Carlyon said the city did not reach 40 degrees once in January and only breached 30 degrees seven times.