Sleepless in Melbourne - heat, humidity and rainfall set new January records for Victoria

BOM: Average Tmin deciles for January

Sleepless in Melbourne? January was a warm one for Melbourne despite presence of La Nina (ENSO) which usually cools global temperatures marginally. 

The trend was particularly noteable with record mean minimum temperatures for Melbourne and most of Victoria this year. Victoria's January mean minimum temperatures are rising faster than mean maximum temperatures. 

There was also record humidity for January for most of Victoria. Record rainfall was also recorded in north east Victoria.

It seems there will be lots more sleepless January nights in store for us all in Melbourne in future years.

Guest Post: It's official: 2015 was the hottest year ever recorded

Janette Lindesay, Australian National University and Mark Howden, CSIRO

It’s official: 2015 was the hottest year on record. The US-based National Oceanic and Atmospheric Administration has confirmed overnight that 2015 saw the global average temperature climbing to 0.90°C above the 20th-century average of 13.9°C. The record has been confirmed by the UK Met Office.

It’s been only a year since the record was previously broken, but 2015 stands out as an extraordinarily hot year. 2014, the previous hottest year, was 0.74°C above the global average. December 2015 marks the first time in the NOAA record a global monthly temperature anomaly has exceeded 1°C - it reached 1.11°C.

Every month since February 1985 has been warmer than average, and 2015 is the 39th consecutive year with above-average annual temperatures in an uninterrupted run that began in the mid 1970s. Ten months in 2015 beat previous records for those months.

Melbourne heatwave a sizzling autumn end to an angry summer

Melbourne is setting another temperature record: the longest number of days of any month where the maximum temperature exceeds 30 degrees Celsius.

Monday was the 8th consecutive day of above 30C heat with a forecast of at least two more days of temperatures in the mid 30s. That will make 10 continuous days before a cool change is expected late on Wednesday brings down temperatures to a milder high 20s.

The previous record for any month was 8 continuous days set in February 1961. For the month of March, seven consecutive days above 30C is the record set in 1995.

The average temperature in Melbourne during March is 23.9C. The hottest March on record was 1940 with an average of 28.9C which we may well be on track to exceed this year.

And if you were tossing and turning in bed due to the heat, here is the reason: Melbourne experienced it's warmest March night on record on Tuesday night (12/3) according to a news report. Temperatures fell to a minimum of 26.5 degrees. The previous record was a minimum of 26.3 degrees set back in 1927.

Yes - the long term trend just keeps getting hotter. But we have had autumn heat waves before, they just weren't as long.

Related: The Bureau of Meteorology have issued a special climate statement on the Autumn heatwave: A prolonged autumn heatwave for southeast Australia (PDF) The statement was issued 15th of March 2013