SUMMARY
Geelong was much drier than average for September and slightly cooler than the latest 30-year average.
TEMPERATURE
Geelong’s temperatures were slightly below the average for September. Minimums were 6.7 degrees (long-term average 7.2) and maximums 17.1 C (average 17.1).
The coldest morning occurred on the 4th when the mercury dropped to 1.2 C, and the highest maximum (24.9 C) occurred on the 11th and 27th.
A number of cold fronts crossed Geelong during the month but little rain resulted.
The photo below by the author shows a cold front crossing Geelong at 4.15 pm on Sept 6th. Please click to enlarge.
The photo below from Geelong looking southwards towards Torquay shows Cirrus Kelvin-Helmholtz clouds around 3 pm on 17th Sept. The British MetOffice describes these clouds as:
“An extremely rare phenomenon where a cloud produces a billowing wave pattern. They occur when there is a strong vertical shear between two air streams causing winds to blow faster at the upper level than at the lower levels.”
Photo by author; please click to enlarge.
RAINFALL
Only 21.6 mm fell for the month at Breakwater, and the suburban areas received between 10 mm and 26 mm compared to the long-term average of 51.1 mm. This result was within the lowest 10% of all recorded falls since 1871. The Bellarine Peninsula and virtually all of southwestern Victoria experienced low rainfalls. On Geelong’s wettest 24-hour period to 9 am we only recorded 4.4 mm on the 29th.
OTHER FEATURES
On two occasions wind gusts reached 72 km/h at Breakwater, much fewer than recent months. There were no storms, one frost (1.2 C on the 4th) and one hail event in Torquay on the 19th.
RAINFALL DATA
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