Tuesday, 9 January 2018 - Annual Climate Summary for Greater Melbourne - Product code IDCKGC56L0
Greater Melbourne in 2017: warmer than average with close to average rainfall
Rainfall in Melbourne during 2017 was slightly below average overall. April and December were very wet months, but winter and spring tended to be drier than average. Mean maximum temperatures were above average throughout Greater Melbourne, with mean minimum temperatures close to average in most areas.
Slightly drier than average
- Rainfall in 2017 was average to below average across most of Greater Melbourne, although a very wet December resulted in Coldstream having a wetter than average year
- Annual rainfall totals ranged from 87% of average at Moorabbin Airport to 109% of average at Coldstream
- After near-average rainfall for most parts of Melbourne earlier in the year, April was very wet, with rainfall more than double the monthly average in some northern and western suburbs
- May, June, and July were much drier than average for most sites in Greater Melbourne, with some northern suburbs having their driest winter for more than 20 years
- Rainfall in September, October, and November was below average in most suburbs, with spring totals drier than average throughout Greater Melbourne
- In early December, a significant rain event resulted in the Melbourne region's wettest day of the year, with 112.4 mm recorded at Wallaby Creek in Kinglake West
Warmer than average
- This was the first year since 1999 that no site in Greater Melbourne reached 40 degrees
- Despite the lack of very hot days, mean maximum temperatures for the year were warmer than average in all Melbourne suburbs
- Mean minimum temperatures were generally close to average, although Essendon Airport had nights that were 1.2 °C warmer than average for the year overall
- January mean temperatures were warmer than average for all Melbourne suburbs and Laverton RAAF and Moorabbin Airport had their highest daily minimum temperatures on record
- After a cooler than average February, March was very warm, with mean maximum temperatures between three and four degrees above average at most locations in the Melbourne metropolitan area
- In June and July, persistent high pressure systems resulted in clear skies and light winds, keeping daytime temperatures generally warmer than average while overnight temperatures were cooler than average
- On 3 July, Cerberus had its lowest temperature on record
- In November, mean daytime temperatures were more than four degrees warmer than average in most suburbs, with several sites having their highest November mean daily maximum temperature on record
Melbourne (Olympic Park)
- Total rainfall for Melbourne (Olympic Park) was 602.0 mm
- The mean daily maximum temperature for Melbourne (Olympic Park) was 20.9 °C. The warmest day was 37.8 °C on 17 January, and the coolest day was on 3 August when the temperature reached 9.0 °C
- The mean daily minimum temperature for Melbourne (Olympic Park) was 11.7 °C. The coldest morning was 0.8 °C on 2 July, and the warmest morning was on 8 January when the minimum temperature was 28.0 °C
Further information
- Media
- media@bom.gov.au (03) 9669 4057
- Enquiries
- helpdesk.climate@bom.gov.au
Extremes Maps Records Summaries Important notes the top
Extremes in 2017 | |
---|---|
Hottest day |
39.1 °C at Laverton RAAF on 19 Dec |
Warmest days on average |
21.5 °C at Viewbank |
Coolest days on average |
17.1 °C at Ferny Creek |
Coldest day |
5.7 °C at Wallan (Kilmore Gap) on 27 Jun |
Coldest night |
-5.3 °C at Coldstream on 2 Jul |
Coolest nights on average |
7.7 °C at Coldstream |
Warmest nights on average |
11.9 °C at Frankston AWS |
Warmest night |
28.9 °C at Laverton RAAF on 8 Jan |
Warmest on average overall |
16.3 °C at Melbourne (Olympic Park) |
Coolest on average overall |
13.1 °C at Ferny Creek |
Wettest overall |
1304.6 mm at Ferny Creek |
Driest overall |
439.2 mm at Melton Reservoir |
Wettest day |
112.4 mm at Kinglake West (Wallaby Creek) on 3 Dec |
Strongest wind gust |
117 km/h at Wallan (Kilmore Gap) on 19 Dec |
Extremes Maps Records Summaries Important notes the top
Record highest daily minimum temperature | ||||||
---|---|---|---|---|---|---|
New record (°C) |
Old record |
Years of record |
Annual average |
|||
Laverton RAAF | 28.9 | on 8 Jan | = 28.9 | on 21 Jan 1997 | 75 | 9.3 |
Moorabbin Airport | 28.7 | on 8 Jan | 28.6 | on 15 Jan 2014 | 47 | 10.1 |
Record lowest temperature | ||||||
---|---|---|---|---|---|---|
New record (°C) |
Old record |
Years of record |
Annual average |
|||
Cerberus | -3.0 | on 3 Jul | -2.9 | on 19 Jul 2015 | 27 | 9.8 |
Extremes Maps Records Summaries Important notes the top
Summary statistics for 2017 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Maximum temperatures (°C) |
Minimum temperatures (°C) |
Rainfall (millimetres) |
||||||||||
Mean for 2017 |
Diff from average |
Highest for 2017 |
Mean for 2017 |
Diff from average |
Lowest for 2017 |
Total for 2017 |
Average annual total |
Rank of 2017 |
Fraction of annual average |
|||
Coldstream | 21.2 | +0.8 | 38.2 | 17 Jan | 7.7 | +0.3 | -5.3 | 2 Jul | 798.6 | 734.8 | high | 109% |
Essendon Airport | 21.3 | +1.6 | 38.9 | 17 Jan | 10.5 | +1.2 | -2.0 | 1 Jul | 551.6 | 587.4 | average | 94% |
Ferny Creek | 17.1 | 33.2 | 17 Jan | 9.2 | 1.3 | 28 Aug | 1304.6 | |||||
Frankston AWS | 19.4 | +0.7 | 35.8 | 13 Dec | 11.9 | +0.2 | 2.0 | 1 Jul | ||||
Laverton RAAF | 20.8 | +1.1 | 39.1 | 19 Dec | 10.2 | +0.9 | -1.7 | 1 Jul | 475.0 | 535.7 | average | 89% |
Melbourne (Olympic Park) | 20.9 | 37.8 | 17 Jan | 11.7 | 0.8 | 2 Jul | 602.0 | |||||
Melbourne Airport | 21.1 | +1.3 | 38.3 | 19 Dec | 9.8 | +0.2 | -0.6 | 2 Jul | 519.8 | 534.5 | average | 97% |
Moorabbin Airport | 20.8 | +1.0 | 37.3 | 13 Dec | 10.8 | +0.7 | -2.1 | 2 Jul | 618.4 | 707.8 | low | 87% |
Scoresby Research Institute | 21.0 | +1.4 | 37.5 | 17 Jan | 9.8 | +0.2 | -0.6 | 1 Jul | 813.8 | 858.5 | average | 95% |
Viewbank | 21.5 | +0.7 | 38.2 | 17 Jan | 10.0 | 0.0 | -2.8 | 2 Jul | 651.6 | 656.3 | average | 99% |
Wallan (Kilmore Gap) | 18.1 | +1.3 | 38.5 | 17 Jan | 8.7 | +0.6 | 0.0 | 16 Jul |
Extremes Maps Records Summaries Important notes the top
Notes
The Annual climate summary, generally published on the second working day of the year, lists the main features of the weather in Greater Melbourne using the most timely and accurate information available on the date of publication; it will generally not be updated. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.
In September 2017 this summary was broadened to include data from observing sites in or near the Greater Melbourne “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to “include the population within the urban area of the city, as well as people who regularly socialise, shop or work within the city, and live in small towns and rural areas surrounding the city. It is important to note that GCCSAs do not define the built up edge of the city. They provide a stable definition for these cities and are designed for the output of a range of social and economic survey data.”
This statement has been prepared based on information available at on Tuesday 9 January 2018. Some checks have been made on the data, but it is possible that results will change as new information becomes available.
In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.
Averages for individual sites 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.
Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.
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