Environment
Temperatures at Halley rarely rise above 0°C although temperatures around -10°C are common on sunny summer days. Typical winter temperatures are below -20°C with extreme lows of around -55°C.
Winds are predominantly from the east; strong winds often picking up the dusty surface snow reducing visibility to a few metres.
One of the reasons for the location of Halley is that it is under the auroral oval, resulting in frequent displays of the Aurora Australis overhead. These are easiest to see during the 105 days (29 Apr - 13 Aug) when the sun does not rise above the horizon.
Read more about this topic: Halley Research Station
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