The mean annual temperature in Bariloche is in the city centre (1901–1950). At the airport in the eastern end, the mean annual temperature is (for the period 1981–2010). In January, daytime temperatures normally range from and may occasionally go up to . The average minimum in January is at the city centre and at the airport although during warm days, nighttime temperatures can reach to . In winter, daytime temperatures range from while nighttime temperatures approach freezing or less. Temperatures vary by altitude; in general, the temperature decreases by for every increase in altitude.