Tuesday, 5 October 2021 - Monthly Climate Summary for Victoria - Product code IDCKGC16R0

Victoria in September 2021: warm days, above average rainfall in the east

September rainfall was above average for the state as a whole. Daytime temperatures were warmer than average across much of Victoria, while night-time temperatures were warmer than average in most of Victoria's east and south.

Above average rainfall

• Averaged across the state, rainfall was 11% above the long-term (1961-1990) mean.
• September was wetter than average in most of eastern Victoria, with some parts very much wetter than average.
• It was drier than average in the state's south-west.
• A strong cold front crossed Victoria on the 3rd and 4th, bringing widespread moderate rainfall; many sites recorded daily totals above 30 mm, with locally much higher totals up to 80 mm in Gippsland.
• A series of cold fronts and low pressure troughs crossed the state between the 17th and 20th and brought showers, thunderstorms, strong winds, hail and low-level snow.
• Towards the end of month, a complex low pressure system and an associated low pressure trough that extended well into the tropics resulted in widespread rainfall across Victoria.
• The highest daily rainfall in Victoria this September was 123.2 mm, recorded at Lorne (Mount Cowley) on the 30th.
• Many sites had their highest September daily rainfall on record between the 4th and 6th and on the 30th.
• Some sites had their highest total September rainfall on record, or their highest total September rainfall for at least 20 years
• Victoria's January to September rainfall totals were around 3% above the long-term average.

Warm days

• Daytime temperatures were warmer than average across much of Victoria.
• Night-time temperatures were warmer than average in most of the state's east and south, with parts of Gippsland experiencing much warmer than average nights.
• Averaged across the state, mean maximum and minimum temperatures were 1.30 °C and 0.60 °C above average respectively.
• On the 2nd, daytime temperatures were up to 10 degrees above average across Victoria, with many sites recording their early season maximum temperature records.
• The highest daily maximum temperature in the state this September was 33.0 °C, recorded at Mildura Airport on the 2nd.
• Victoria's highest daily minimum temperature this month, 21.7 °C, was recorded at Moorabbin Airport on the 3rd; this was the equal fifth highest daily minimum temperature on record for Victoria, and the highest this early in September.
• Some sites had their warmest September night (highest daily minimum temperature) on record on the 3rd.
• Despite generally mild night-time temperatures, there were some cold nights, notably between the 13th and 15th, on the 21st and the 26th.
• The lowest daily minimum temperature this September was −7.7 °C, recorded at Mount Hotham on the 26th.
• For the year-to-date, Victoria's mean temperature was 0.37 °C above average.

Strong winds and snow

• Rised dust was observed in the north-west of the state on the 2nd, associated with the passage of a cold front.
• Minor to moderate flood warnings were issued for a number of rivers in eastern Victoria after heavy rainfall between the 4t and 6th.
• Cold fronts that crossed Victoria between the 17th and 20th generated strong and gusty winds and were followed by polar air in their wake; snow fell to low levels with reports of snow in the Macedon and Yarra Ranges and at Mount Baw Baw, and snow flurries were reported around Ballarat and in the Dandenong Ranges.
• This month the strongest wind gust of 141 km/h was recorded at Wilsons Promontory Lighthouse on the 18th.

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top

Maps
	Observed	Anomaly	Decile rank
Total rainfall
Mean daily maximum temperatures
Mean daily minimum temperatures

Click on a map to show it full size in a pop-up window

* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top