Climate of Tasmania
Encyclopedia
Tasmania
Tasmania
Tasmania is an Australian island and state. It is south of the continent, separated by Bass Strait. The state includes the island of Tasmania—the 26th largest island in the world—and the surrounding islands. The state has a population of 507,626 , of whom almost half reside in the greater Hobart...

has a cool temperate climate with four distinct seasons. Summer lasts from December to February when the average maximum sea temperature is 21 °C (69.8 °F) and inland areas around Launceston reach 24 °C (75.2 °F). Other inland areas are much cooler with Liawenee, located on the Central Plateau, one of the coldest places in Australia with temperatures in February ranging between 4 °C (39.2 °F) to 17 °C (62.6 °F). Autumn lasts between March and May and experiences changeable weather, where summer weather patterns gradually take on the shape of winter patterns.
The winter months are between June and July and are generally the wettest and coolest months in the state, with most high lying areas receiving considerable snowfall. Winter maximums are 12 °C (53.6 °F) on average along coastal areas and 3 °C (37.4 °F) on the central plateau, thanks to a series of cold fronts from the Southern Ocean.
Spring is a season of transition, where winter weather patterns begin to take the shape of summer patterns, although snowfall is still common up until October. Spring is generally the windiest time of the year with afternoon sea breezes starting to take effect on the coast.

Rainfall in Tasmania follows a complicated pattern rather analogous to that found on large continents at the same latitude in the northern hemisphere. On the western side rainfall increases from around 1458 millimetres (57.4 in) at Strahan on the coast up to 2690 millimetres (105.9 in) at Cradle Valley in the highlands.

There is a strong winter maximum in rainfall: January and February typically averages between 30-40% the rainfall of July and August, though even in the driest months rain usually falls on every second day and the number of rainy days per year is much greater than on any part of the Australian mainland. Further east in the Lake Country, annual rainfall declines to around 900 millimetres (35.4 in), whilst in the Midlands, annual rainfall is as low as 450 millimetres (17.7 in) at Ross and generally below 600 millimetres (23.6 in). The eastern part of Tasmania has more evenly distributed rainfall than in the west, and most months receive very similar averages.

The densely populated northern coast is much drier than the western side, with annual rainfall ranging from 666 millimetres (26.2 in) in Launceston to 955 millimetres (37.6 in) in Burnie in the north west and 993 millimetres (39.1 in) in Scottsdale located further to the east.
Most rain falls in winter, and in summer the average can be as low as 31 millimetres (1.2 in) per month in Launceston. The east coast is wetter than the Midlands, with an average annual rainfall ranging from 775 millimetres (30.5 in) in St. Helens to around 640 millimetres (25.2 in) in Swansea.
Here the rainfall is evenly distributed over the year but can be very erratic as heavy rainfalls from the warm Tasman Sea are quite frequent. Whereas a three-day fall of 125 millimetres (4.9 in) occurs only once every fifty years on the north coast, it occurs on average once every four or five years around Swansea and Bicheno, and on 7–8 June 1954, there were many falls as large as 230 millimetres (9.1 in) in two days in that area. The east coast is sometimes called the "sun coast" because of its sunny climate.

Several sections of inland Tasmania, together with Flinders Island
Flinders Island
Flinders Island may refer to:In Australia:* Flinders Island , in the Furneaux Group, is the largest and best known* Flinders Island * Flinders Island , in the Investigator Group* Flinders Island...

, were declared drought-affected areas by the state government in 2007.

The highest recorded maximum temperature in Tasmania was 42.2 °C (108 °F) at Scamander
Scamander, Tasmania
Scamander is a small town situated at the mouth of the Scamander River between St Helens and St Marys on the northeast coast of Tasmania in Australia. The town is a popular holiday destination because of its wide, sandy beaches and views of the ocean...

 on 30 January 2009, during the 2009 southeastern Australia heat wave
2009 southeastern Australia heat wave
The early 2009 southeastern Australia heat wave was a heat wave that commenced in late January and led to record-breaking prolonged high temperatures in the region. The heat wave is considered one of the, if not the, most extreme in the region's history. During the heat wave, fifty separate...

. Tasmania's lowest recorded minimum temperature was -13.0 °C on 30 June 1983, at Butlers Gorge, Shannon, and Tarraleah
Tarraleah, Tasmania
Tarraleah is a small town located in the rugged wilderness of the Central Highlands of Tasmania, north-west of the state capital Hobart, and slightly closer to Queenstown....

.

Hobart

Hobart
Hobart
Hobart is the state capital and most populous city of the Australian island state of Tasmania. Founded in 1804 as a penal colony,Hobart is Australia's second oldest capital city after Sydney. In 2009, the city had a greater area population of approximately 212,019. A resident of Hobart is known as...

 has a mild temperate oceanic climate
Oceanic climate
An oceanic climate, also called marine west coast climate, maritime climate, Cascadian climate and British climate for Köppen climate classification Cfb and subtropical highland for Köppen Cfb or Cwb, is a type of climate typically found along the west coasts at the middle latitudes of some of the...

 (Köppen climate classification
Köppen climate classification
The Köppen climate classification is one of the most widely used climate classification systems. It was first published by Crimea German climatologist Wladimir Köppen in 1884, with several later modifications by Köppen himself, notably in 1918 and 1936...

), with four distinct season
Season
A season is a division of the year, marked by changes in weather, ecology, and hours of daylight.Seasons result from the yearly revolution of the Earth around the Sun and the tilt of the Earth's axis relative to the plane of revolution...

s. The highest temperature recorded was 40.8°C on 4 January 1976 and the lowest was −2.8°C on 25 June 1972. Compared to other major Australia cities Hobart has the second least daily average hours of sunshine, with 5.9 hours. (Melbourne has the least) The city rarely receives snow in winter; however, the adjacent Mount Wellington is often seen with a covering in winter, and it has received unseasonal snowfalls in all seasons, including summer. Hobart during the 20th century did receive many snowfalls at sea level because of cold masses arriving from Antarctica. These snow-bearing winds often carried on through Tasmania and Victoria to the Snowy Mountains
Snowy Mountains
The Snowy Mountains, known informally as "The Snowies", are the highest Australian mountain range and contain the Australian mainland's highest mountain, Mount Kosciuszko, which reaches 2,228 metres AHD, approximately 7310 feet....

 in New South Wales and Northern Victoria. Though snow is unusual in general at sea level in Australia, Hobart has most probably had the most sea level snowfalls out of any State Capital, though Sydney
Sydney
Sydney is the most populous city in Australia and the state capital of New South Wales. Sydney is located on Australia's south-east coast of the Tasman Sea. As of June 2010, the greater metropolitan area had an approximate population of 4.6 million people...

, Melbourne
Melbourne
Melbourne is the capital and most populous city in the state of Victoria, and the second most populous city in Australia. The Melbourne City Centre is the hub of the greater metropolitan area and the Census statistical division—of which "Melbourne" is the common name. As of June 2009, the greater...

 and Adelaide
Adelaide
Adelaide is the capital city of South Australia and the fifth-largest city in Australia. Adelaide has an estimated population of more than 1.2 million...

 have also recorded snow. Mount Wellington has snowfalls through every season, even summer, because of its elevation.

Launceston

Launceston has a mild, temperate climate,
with four distinct seasons. The city is located in the Tamar Valley
Tamar Valley, Tasmania
The Tamar Valley is a picturesque valley in Tasmania. It runs north-west from the northern city of Launceston to the coast either side of the Tamar River, a distance of approximately 50 km....

 and is surrounded by many large hills and mountains. With this type of topography, Launceston's weather patterns can change in a short period of time.

The warmest months are in January and February with an average air temperature range of 12.2 °C (54 °F) up to 26.4 °C (80 °F). Throughout the year there is an average of 8.3 days a year over 30 °C (86 °F). The maximum recorded temperature was 41 °C (106 °F) on 30 January 2009, with Launceston Airport reaching 42.4 °C (108 °F) on that same day, during the 2009 Southeastern Australia heat wave
2009 southeastern Australia heat wave
The early 2009 southeastern Australia heat wave was a heat wave that commenced in late January and led to record-breaking prolonged high temperatures in the region. The heat wave is considered one of the, if not the, most extreme in the region's history. During the heat wave, fifty separate...

.
Winters are cool with minimum temperatures dropping below 1 °C (34 °F) an average of 61 days a year. The coldest month is July, with an average temperature range of 0.2 °C (32 °F) - 14.5 °C (58 °F).
The lowest recorded minimum at Launceston's current weather station, Ti Tree Bend was -7.2 C, and unlike many other areas of Tasmania, Launceston rarely receives snowfall.

Winter, for Launceston, is also the season with the least amount of wind. Because of this and the topographical affect of the Tamar Valley, Launceston winters are renowned for foggy mornings, with Launceston Airport the most fog-bound commercial airport in Australia. The average annual rainfall, with moderate to low variability is 665 mm (26 in), falling an average of 88.4 days a year. The most rain Launceston received in a year was 829.6 millimetres (32.7 in) in 1992, with 2006 being the driest year when just 394.8 millimetres (15.5 in) fell.

The Bureau of Meteorology reported that 2007, was the warmest year ever recorded in Launceston since temperatures were first recorded in 1884. Temperatures ranged from a minimum of 8.1 °C (46.6 °F) – to a maximum of 21.2 °C (70.2 °F).
During 2006 and 2007, Launceston had the warmest maximums throughout the state. In 2008, Launceston had the highest average maximum temperature out of all Tasmanian cities with 20.6 °C (69.1 °F).

Devonport

Devonport has cool winters and mild summers. Summer daytime temperatures seem to stay between 20 and 23 degrees due to sea breezes.

Burnie

The average temperature in summer ranges from 12.5 to 21 °C with drier non sea breeze days as warm as 27 °C, with around 16 hours of sunshine per day. In winter, temperature ranges from 6 to 13 °C, and only 8 hours of sunshine. Relative humidity averages over 60% for the year in the afternoon.

Burnie averages 994 mm of rainfall per year. Most of the rain is in the second half of the year from July to December.

Strahan

Strahan has a mild and wet climate. The highest recorded temperature in Strahan was 37.2°C on 14 February 1982 and the lowest being -3°C on 30 June 1983.

External links

  • Climate diagrams of Tasmania at WikiMedia Commons
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