It's kind of hard to believe given Sydney's cool start to May this year, but with recent temperatures both weather stations at the Airport and Observatory Hill are on track to register their warmest May average maximums on record.
Including yesterday which got to 26.5C, the prior 2 weeks have had an average daily maximum of 24.0C at the Airport. Similarly, Observatory Hill has seen an average of 24.4C for the same period. Not even the long term average for April is that warm. The long term average at the Airport between May 10 and 23 is 19.8C. The 2 week autumn period with a long term average maximum of 24.0C can be found between March 28 and April 10.
The current average monthly maximum at Sydney Airport after 23 days of the month stands at 22.3C. Since records began in 1939, the warmest average maximum for May of 22.8C was recorded in 1958. The next highest of 22.7C was just recently in 2007.
For Observatory Hill the current average monthly maximum is 23.0C. Records there date back to 1859, but 1958 also holds the record with 22.7C. 2007 is again the second warmest with 22.4C.
Based on current Bureau of Meteorology forecasts up until May 31, Observatory Hill will easily beat the 1958 record with the Airport either equalling or just beating it.
Unlike the average maximums, the minimums for the month so far, while above average, look unlikely to challenge the all time records. 1989 holds the record for both locations with 13.3C at the Airport and 14.0C at Observatory Hill, easily above the current respective figures of 12.3C and 12.4C.
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