Wednesday, 1 June 2011 - Seasonal Climate Summary for Melbourne Metropolitan Area and Environs - Product code IDCKGC2xx0
Melbourne Metropolitan Area in autumn 2011: Cold and wet days
- Coldest average autumn maximum temperatures for some stations
- The wettest autumn on record for some stations
- Average night-time temperatures mixed.
Extremes Records Summaries Important notes the top
Rainfall
Rainfall totals around Melbourne ranged from average to highest on record. The wettest station overall was Ferny Creek (Dunns Hill) with 394.8 mm and the driest was Avalon Airport with 85.0 mm. As the rainfall totals varied from station to station, so to did the number of rain days. Bundoora observed the least rain days in the Melbourne area, recording 31 for the season. At the other end of the scale, Cranbourne Botanic Gardens observed 54 rain days. The wettest single day was the 12th of April when Viewbank (ARPANSA) recorded 67.2 mm.
Temperature
Maximum temperature
A couple of stations recorded their coolest average Autumn daytime temperatures. Generally, stations that didn't break records still observed average daytime temperatures much lower than normal. The hottest day was the 13th of March when Essendon Airport recorded 33.4 °C. The warmest days on average were at Melbourne Regional Office with 20.3 °C. The coolest days on average were at Ferny Creek (Dunns Hill) with 14.8 °C. The coldest day was the 11th of May when Ferny Creek (Dunns Hill) recorded 4.7 °C.
Minimum temperature
Average minimum temperatures were mixed but most stations were within 1 °C of their long-term means. The coldest night was the 10th of May when Coldstream recorded -1.0 °C. Viewbank recorded their lowest autumn temperature on record on the 10th of May. The coolest nights on average were at Coldstream with 7.9 °C, whilst the warmest nights on average were at Melbourne Regional Office with 12.1 °C. The warmest night was the 13th of March when Melbourne Regional Office recorded 20.8 °C.
Further information
- Media
- media@bom.gov.au (03) 9669 4057
- Enquiries
- helpdesk.climate@bom.gov.au
| Extremes in autumn 2011 | |
|---|---|
| Hottest day | 33.4 °C at Essendon Airport on 13 Mar |
| Warmest days on average | 20.3 °C at Melbourne Regional Office |
| Coolest days on average | 14.8 °C at Ferny Creek (Dunns Hill) |
| Coldest day | 4.7 °C at Ferny Creek (Dunns Hill) on 11 May |
| Coldest night | -1.0 °C at Coldstream on 10 May |
| Coolest nights on average | 7.9 °C at Coldstream |
| Warmest nights on average | 12.1 °C at Melbourne Regional Office |
| Warmest night | 20.8 °C at Melbourne Regional Office on 13 Mar |
| Warmest on average overall | 16.2 °C at Melbourne Regional Office |
| Coolest on average overall | 11.8 °C at Ferny Creek (Dunns Hill) |
| Wettest overall | 394.8 mm at Ferny Creek (Dunns Hill) |
| Driest overall | 85.0 mm at Avalon Airport |
| Wettest day | 67.2 mm at Viewbank (ARPANSA) on 12 Apr |
| Highest wind gust | 83 km/h at Ferny Creek (Dunns Hill) on 22 May |
Extremes Records Summaries Important notes the top
| Record highest total autumn rainfall | |||||
|---|---|---|---|---|---|
|
Total rainfall for autumn 2011 (mm) |
Previous wettest for autumn |
Years of record |
Average for autumn |
||
| Coldstream | 262.4 | 252.8 | in 1999 | 17 | 173.7 |
| Viewbank (ARPANSA) | 260.8 | 233.6 | in 2001 | 12 | 153.4 |
| Record lowest autumn mean daily maximum temperature | |||||
|---|---|---|---|---|---|
|
Mean daily maximum temperature for autumn 2011 (°C) |
Previous coolest for autumn |
Years of record |
Average for autumn |
||
| Avalon Airport | 19.4 | = 19.4 | in 1996 | 15 | 20.6 |
| Viewbank (ARPANSA) | 19.6 | 20.3 | in 2006 | 11 | 21.3 |
| Record lowest autumn temperature | ||||||
|---|---|---|---|---|---|---|
|
Lowest temperature in autumn 2011 (°C) |
Previous coolest for autumn |
Years of record |
Average for autumn |
|||
| Viewbank (ARPANSA) | -0.3 | on 10 May | -0.1 | on 30 Apr 2009 | 12 | 10.1 |
Extremes Records Summaries Important notes the top
| Summary statistics for autumn 2011 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures for autumn (°C) |
Minimum temperatures for autumn (°C) |
Rainfall for autumn (millimetres) |
||||||||||
| Mean for autumn 2011 |
Diff from average |
Highest for autumn 2011 |
Mean for autumn 2011 |
Diff from average |
Lowest for autumn 2011 |
Total for autumn 2011 |
Average for autumn |
Rank of autumn 2011 |
Fraction of autumn average |
|||
| East Central (district 86) | ||||||||||||
| Bundoora (Latrobe University) | 19.2 | -1.3 | 31.9 | 13 Mar | 10.3 | +0.3 | 0.4 | 10 May | 217.6 | 151.4 | v high | 144% |
| Cerberus | 18.7 | -1.0 | 30.0 | 12 Mar | 10.5 | +0.3 | 2.7 | 30 May | 222.0 | 175.6 | high | 126% |
| Coldstream | 19.2 | -1.5 | 31.7 | 13 Mar | 7.9 | +0.8 | -1.0 | 10 May | 262.4 | 173.7 | highest | 151% |
| Cranbourne Botanic Gardens | 18.6 | -1.3 | 31.5 | 13 Mar | 10.2 | -0.1 | 3.9 | 10 May | 212.9 | 178.2 | high | 119% |
| Essendon Airport | 19.4 | -0.6 | 33.4 | 13 Mar | 10.3 | +0.4 | 1.0 | 10 May | 135.2 | 143.7 | average | 94% |
| Ferny Creek (Dunns Hill) | 14.8 | -1.3 | 27.7 | 13 Mar | 8.8 | -0.6 | 1.6 | 12 May | 394.8 | 262.8 | high | 150% |
| Melbourne Airport | 19.3 | -1.0 | 32.3 | 13 Mar | 9.9 | -0.5 | 2.3 | 10 May | 116.6 | 121.0 | average | 96% |
| Melbourne Regional Office | 20.3 | 0.0 | 32.5 | 13 Mar | 12.1 | +1.2 | 3.5 | 10 May | 211.2 | 163.5 | high | 129% |
| Moorabbin Airport | 19.3 | -0.9 | 32.3 | 13 Mar | 10.6 | 0.0 | 1.8 | 10 May | 192.2 | 177.7 | average | 108% |
| Scoresby Research Institute | 19.1 | -1.0 | 31.2 | 13 Mar | 9.9 | -0.3 | 0.8 | 10 May | 242.6 | 212.1 | average | 114% |
| Viewbank (ARPANSA) | 19.6 | -1.7 | 32.2 | 13 Mar | 10.0 | -0.1 | -0.3 | 10 May | 260.8 | 153.4 | highest | 170% |
| West Central (district 87) | ||||||||||||
| Avalon Airport | 19.4 | -1.2 | 31.5 | 7 Mar | 9.5 | -0.3 | 1.2 | 31 May | 85.0 | 98.7 | average | 86% |
| Laverton RAAF | 19.2 | -1.0 | 32.0 | 13 Mar | 10.0 | 0.0 | 2.2 | 10 May | 121.0 | 127.6 | average | 95% |
Extremes Records Summaries Important notes the top
Notes
A Seasonal Climate Summary is prepared to list the main features of the weather in Melbourne Metropolitan Area and Environs using the most timely and accurate information available on the date of publication; it will generally not be updated. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review, usually published in the fourth week of the month.
This statement has been prepared based on information available at 2 pm on Wednesday 1 June 2011. Some checks have been made on the data, but it is possible that results will change as new information becomes available.
Averages are long-term means based on observations from
all available years of record, which vary widely from site to site.
They are not shown for sites with less than 10 years of record, as they cannot then be calculated reliably.
The median
is sometimes more representative than the
mean
of long-term average rain.
The Rank indicates how rainfall this time compares with the climate record for the site,
based on the
decile ranking
(very low rainfall is in decile 1, low in decile 2 or 3,
average in decile 4 to 7, high in decile 8 or 9
and very high is in decile 10).
The Fraction of average shows how much rain has fallen this time as a
percentage of the long-term mean.
Further information
- Media
- media@bom.gov.au (03) 9669 4057
- Enquiries
- helpdesk.climate@bom.gov.au
Unless otherwise noted, all maps, graphs and diagrams in this page are licensed under the Creative Commons Attribution 4.0 International Licence
