Coldest October Week for 37 Years in Sydney

During the week from the 4th to the 10th of October, Sydney’s average maximum temperature was just 18.7C which makes it the coldest October week in Sydney for 37 years.  In 1981 the average maximum of the 18th to the 24th of October was 18.5C.  Cloudy periods and showers have helped contribute to the cooler conditions by blocking out the sun, along with a lack of northerly winds that would traditionally be drawing in warmer air from the interior.

Other notable statistics include:

  • For the first 6 weeks of spring, 12 days have failed to 18C.  This is more than the previous five years combined!
  • Half of all days for the first 6 weeks of spring in Sydney have been below 20C
  • Despite this, September 2018 was still slightly above average with an average maximum of 20.9C (the long-term historical average maximum is 20.1C).

A comparison for the first 6 weeks of spring in 2018 vs the previous five years is provided below:

  2018 2017 2016 2015 2014 2013
Days below 18C 12 1 1 4 3 1
Days above 20C 21 31 40 29 32 37
Days above 25C 4 12 5 7 8 18
Days above 30C 1 3 2 3 3 5