Monthly Weather Review, September 2023

October 1, 2023


The total rainfall was 4.4 mm. This is 13.1% of the long-term September mean.

The mean maximum temperature was 20.9° C. This is 2.9° C warmer than the long-term September mean.

The mean minimum temperature was 8.4° C. This is 0.4° C warmer than the long-term September mean.

Weather Records

The total rainfall of 4.4 mm is the lowest September rainfall. The previous record was 9.7 mm in 2018.

The mean maximum temperature of 20.9° C is the warmest September. The previous record was 18.6° C in 2020.

The mean sea level pressure of 1035.9 hPa on the 11th is the highest September pressure. The previous record was 1033.9 on 23 September 2018.

Monthly Review

Truganina Weather monthly summary, September 2023

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Monthly Meteograms

graph of September 2023 daily rainfall at Truganina Weather graph of September 2023 daily temperatures at Truganina Weather
Click on a graph to see it displayed at full-size

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Performance Monitoring

The daily rainfall and temperature data are routinely compared against the BoM AWS at Laverton for quality assurance. The daily rainfall is also routinely compared against the Melbourne Water rainfall and river level station on Skeleton Creek at Hoppers Crossing (Hoppers in the table below).

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performance monitoring report

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Units of Measurement

Unless otherwise advised, temperature is given in degrees Celsius (° C) and rainfall in millimetres (mm).

Observation Times and Reporting Periods

The main observation for the day is at 9 am when the precipitation over the past 24 hours is determined, and the maximum and minimum thermometers are also read and reset. The following conventions are used for assigning dates to the observations made:

Climatology & Station Records

Our climatology and station records are based on all available data since from 1 April 2017. All annual data are based on complete calendar years commencing in 2018.

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