Monday, 2 May 2011 - Monthly Climate Summary for Melbourne Metropolitan Area and Environs - Product code IDCKGC1xx0
Melbourne Metropolitan Area in April 2011: More rain than usual
- Rainfall above average
- Temperatures cooler than usual but close to average
Extremes Records Summaries Important notes the top
Rainfall
Rainfall in April around Melbourne was average to above average. The wettest station overall was Viewbank (ARPANSA) with 119.6 mm which is more than double its long-term average of 58.3 mm. Viewbank also recorded the wettest day of the month on the 12th with 67.2 mm, all other stations except Cranbourne Botanic Gardens recorded their wettest day of the month on the 12th. The driest station overall was Avalon Airport with 41.4 mm but even that was wetter than their long-term average of 37.0 mm. Melbourne Airport recorded 10 rain days for the month whilst to the southeast, Cranbourne Botanic Gardens doubled that with 20. Some sites had their highest total April rainfall for at least 10 years while others had their highest April daily rainfall on record.
Maximum temperature
Maximum temperatures around Melbourne were mixed but generally close to average. All station reported average maximum temperatures within 1 °C of their long-term mean. The coolest days on average, 15.9 °C, were at Ferny Creek (Dunns Hill) whilst the warmest, 21.2 °C, were recorded at Melbourne Regional Office. The warmest day was the 9th when Essendon Airport recorded 27.7 °C, a majority of other stations also recorded their warmest day of the month on the 9th. The coolest day was the 13th when Ferny Creek (Dunns Hill) recorded 9.7 °C. No stations broke any daily or monthly maximum temperature records this month
Minimum temperature
Minimum temperatures for most stations around Melbourne were close to average. The coolest nights on average were 7.2 °C at Coldstream, whilst Melbourne Regional Office recorded the warmest at 11.7 °C. The coldest night was the 11th when Melbourne Airport recorded 3.2 °C, most other stations also recorded their coldest night for the month on the 11th. The warmest night for the month was the 9th when Laverton RAAF recorded 17.3 °C. No stations broke any daily or monthly minimum temperature records this month.
Further information
- Media
- media@bom.gov.au (03) 9669 4057
- Enquiries
- helpdesk.climate@bom.gov.au
| Extremes in April 2011 | |
|---|---|
| Hottest day | 27.7 °C at Essendon Airport on the 9th |
| Warmest days on average | 21.2 °C at Melbourne Regional Office |
| Coolest days on average | 15.9 °C at Ferny Creek (Dunns Hill) |
| Coldest day | 9.7 °C at Ferny Creek (Dunns Hill) on the 13th |
| Coldest night | 3.2 °C at Melbourne Airport on the 11th |
| Coolest nights on average | 7.2 °C at Coldstream |
| Warmest nights on average | 11.7 °C at Melbourne Regional Office |
| Warmest night | 17.3 °C at Laverton RAAF on the 9th |
| Warmest on average overall | 16.5 °C at Melbourne Regional Office |
| Coolest on average overall | 12.7 °C at Ferny Creek (Dunns Hill) |
| Wettest overall | 119.6 mm at Viewbank (ARPANSA) |
| Wettest day | 67.2 mm at Viewbank (ARPANSA) on the 12th |
| Highest wind gust | 72 km/h at Ferny Creek (Dunns Hill) on the 9th |
Extremes Records Summaries Important notes the top
| Record highest April daily rainfall | ||||||
|---|---|---|---|---|---|---|
|
Highest daily rainfall in April 2011 (mm) |
Previous wettest for April |
Years of record |
||||
| Viewbank (ARPANSA) | 67.2 | on the 12th | 53.0 | on the 24th in 2001 | 12 | |
| Highest total April rainfall for at least 10 years | |||||
|---|---|---|---|---|---|
|
Total rainfall for April 2011 (mm) |
Most recent April at least this wet |
Years since wetter |
Average for April |
||
| Scoresby Research Institute | 92.4 | 102.8 | in 1989 | 19 | 66.8 |
| Essendon Airport | 65.0 | 66.0 | in 1978 | 17 | 55.0 |
| Bundoora (Latrobe University) | 86.8 | 121.4 | in 2001 | 10 | 54.4 |
| Coldstream | 87.2 | 102.6 | in 2001 | 10 | 61.3 |
| Ferny Creek (Dunns Hill) | 116.4 | 215.4 | in 2001 | 10 | 94.7 |
| Laverton RAAF | 52.6 | 105.6 | in 2001 | 10 | 45.7 |
| Melbourne Regional Office | 101.8 | 125.6 | in 2001 | 10 | 57.4 |
| Viewbank (ARPANSA) | 119.6 | 131.6 | in 2001 | 10 | 58.3 |
Extremes Records Summaries Important notes the top
| Summary statistics for April 2011 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures for April (°C) |
Minimum temperatures for April (°C) |
Rainfall for April (millimetres) |
||||||||||
| Mean for April 2011 |
Diff from average |
Highest for April 2011 |
Mean for April 2011 |
Diff from average |
Lowest for April 2011 |
Total for April 2011 |
Average for April |
Rank of April 2011 |
Fraction of April average |
|||
| East Central (district 86) | ||||||||||||
| Bundoora (Latrobe University) | 20.2 | -0.3 | 27.0 | 9th | 9.4 | -0.4 | 5.0 | 1st | 86.8 | 54.4 | high | 160% |
| Cerberus | 19.5 | -0.2 | 26.9 | 9th | 9.9 | 0.0 | 4.4 | 11th | 83.8 | 66.5 | high | 126% |
| Coldstream | 20.1 | -0.2 | 25.3 | 9th | 7.2 | +0.6 | 3.6 | 11th | 87.2 | 61.3 | high | 142% |
| Cranbourne Botanic Gardens | 19.4 | -0.4 | 25.5 | 8th | 9.8 | -0.4 | 4.3 | 11th | 100.5 | 70.7 | high | 142% |
| Essendon Airport | 20.3 | +0.3 | 27.7 | 9th | 9.6 | -0.2 | 4.6 | 11th | 65.0 | 55.0 | average | 118% |
| Ferny Creek (Dunns Hill) | 15.9 | -0.1 | 22.0 | 7th | 9.4 | 0.0 | 6.1 | 23rd | 116.4 | 94.7 | high | 123% |
| Melbourne Airport | 20.3 | 0.0 | 27.6 | 9th | 9.3 | -0.9 | 3.2 | 11th | 43.0 | 43.8 | average | 98% |
| Melbourne Regional Office | 21.2 | +0.9 | 27.1 | 9th | 11.7 | +0.9 | 8.2 | 11th | 101.8 | 57.4 | high | 177% |
| Moorabbin Airport | 20.1 | 0.0 | 26.7 | 9th | 9.8 | -0.6 | 4.5 | 11th | 84.2 | 63.0 | high | 134% |
| Scoresby Research Institute | 19.8 | -0.1 | 25.5 | 9th | 9.4 | -0.7 | 4.7 | 11th | 92.4 | 66.8 | high | 138% |
| Viewbank (ARPANSA) | 20.5 | -0.9 | 26.9 | 9th | 9.3 | -0.7 | 5.0 | 11th | 119.6 | 58.3 | high | 205% |
| West Central (district 87) | ||||||||||||
| Avalon Airport | 20.1 | -0.1 | 27.3 | 9th | 8.7 | -0.8 | 4.4 | 11th | 41.4 | 37.0 | average | 112% |
| Laverton RAAF | 20.1 | -0.1 | 26.9 | 9th | 9.3 | -0.5 | 3.5 | 11th | 52.6 | 45.7 | high | 115% |
Extremes Records Summaries Important notes the top
Notes
A Monthly 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 3 pm on Monday 2 May 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
