Ushuaia has a sub polar oceanic climate (Köppen Cfc) Temperatures average 1.6 °C (34.9 °F) in the coolest month (July), and 10.4 °C(50.7 °F) in the warmest month (January). The record low is −28 °C (−18 °F), and record high 29 °C (85 °F) (December). The record low ever recorded in summer is −6 °C (21 °F). On average the city experiences 200 days of light rain or snow a year, with many cloudy and foggy days. Despite receiving only 530 millimetres (21 in) average annual precipitation, Ushuaia is very humid. A similar climate is found in Tórshavn (Faroe Islands), Unalaska (Alaska), Reykjavík (Iceland) and Stanley (Falkland Islands).
Summers tend to be cloudy and windy, with maximum temperatures averaging 15°C during the day and about 5°C at night. Temperatures of 20°C or more occur only on a handful of days, and night frost is always possible, as well as days below 10°C. Temperatures gradually diminish during the fall, to reach maximum temperatures of about 4°C and minimum temperatures of about -1°C in winter, with frequent snow, sleet and rain showers. Some winters may bring extended periods of frost and snow, whereas other winters might just bring snowstorms followed by thaws. Temperatures then very slowly recover during the spring, but snow showers and frost are a common occurrence until the beginning of the summer in December, and they might occur even in midsummer.
The south western winds make the outer islands wetter, reaching 1,400 mm (55 in) at Isla de los Estados (Staten Island). Because temperatures are cool throughout the year, there is little evaporation. Snow is common in winter and regularly occurs throughout the year. Ushuaia occasionally experiences snow in summer (from November to March). Due to its high southern latitude, the city's climate is influenced by Antarctica, and the duration of daylight varies significantly, from more than 17 hours in summer to just over 7 hours in winter
