Generalities abouth Climate in Ushuaia

The Climate of Tierra del Fuego belongs to Subpolar Oceanic. Although temperatures are cold during all the year, it is possible to appreciate Magellanic forest.  Ushuaia has a avergage temperatureof 5,7 °C and a low annual temperature variation, from -0,3 in July to 9,4 °C in January;  it is not common temperatures over 15 °C in Summer or less than -8 °C in Winter. Record of absolute temperatures are 29,4 °C (December) and -25,1 °C (July). Cold is so constant, that in Summer it snows eventually, or temperatures like -6 °C. Precipitations, that in Winter usually falls as snow, are constant during the year (524 mm). Even if it doesn’t seem too much, because of the low temperature, they help to consider Ushuaia as a city with wet weather; it also helps that it rains 200 days a year. Strong winds from the western quadrant, originated in the Pacific, feels hard in the city. They give their shape to unprotected trees that grows with their crowns following wind direction. These are called “flag trees”.

In Summer, during one same day, it can be rainy, then sunny, later snowy and also windy.

Temperatures Average annual 5.3ºC
Average July 1ºC
Average January 9.1ºC
Absolute Maximum (1992) 29.4ºC
Absolute Minimum (1992) -21.1ºC
Winds Quadrant SW
Average Speed 20 km/h
Maximum Speed 160 km/h
Calm Days/year 32
Atmospheric Pressure 990 hectop.
Annual Average relative Humidity 75%
Solar Radiation Winter 48 kcal/cm2/day
Summer 382 kcal/cm2/day
Daylength Winter 6h 45min
Summer 17h 23min
Annual rainfall 530 mm
Snowy Days in 1991 68
Sea surface temperature Winter 5.1ºC
Summer 7.5ºC
Annual 6.3ºC
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