Second-hottest days on record in 2018

A standout year for weather

Weatherwise, 2018 was a standout year, with daytime temperatures being the second-hottest on record, and rainfall that was well-below-average over ten consecutive months.  

The annual average daytime temperature was 25.7C – 2.2C above the 24.5C average – and the second-hottest on record to the 25.8C during 1930.

Nine of the 12 months had above-average daytime temperatures with only May and November being below.

June was average at 17.1C.

The 46.6C recorded on December 28, was that month’s highest-ever maximum temperature, and the highest for any month since 45.9C on January 14, 2001.

The year’s lowest daytime temperature was 12C on June 19.

Port Pirie’s highest maximum of 47.3C (117.1F) was recorded during 1932.

For the first time on record, 2018 had four days that had highs exceeding 45C, compared with the average 0.27 days per year. The previous high was three days during 1939.

A total of 30 days exceeded 37.8C (100F) compared with the average 19 days, which was the highest since the record 32 days during 2015.

Eighteen of those days went on to pass 40C – seven more than average.

Night’s averaged 11.5C – 0.2C above average and were the highest since 11.8C during 2013.   

Temperatures ranged from a very warm night of 29.6C on January 7, - the highest since 30.3C on January 2010 – to a very cold minus -1.7C on August 20.

For the first time on record, 2018 had four days that had highs exceeding 45C, compared with the average 0.27 days per year ... previous high was three days during 1939.

The annual rainfall of 212.2mm on 74 days was the seventh-lowest over 142 years of record and compares with the average 346.5mm on 79 days.

Each of the ten months from January to October had well-below-average rainfall, but the dry run was brought to an end when November had its second-highest monthly rainfall of 76.4mm.

The year ended the way it had started with a dry December contributing just 9.2mm compared with its 21.5mm average.    

The 32.6C average daytime temperature for December was 1.7C above average and the warmest since the record-high of 34.4C during 2015.

Nights averaged 17.9C, which was 2.4C above average, and the highest recorded at the airport for December, since records began in 2006.

Joe McLaughlin compiled the statistics from data supplied by the Port Pirie airport’s automatic weather station and the Bureau of Meteorology in Adelaide.