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Climate

Curitiba has a typically humid subtropical highland climate (Köppen: Cfb). The city's somewhat mild winters, due to its low latitude, differentiate its climate from typically temperate ones.

It's location on a plateau and the flat terrain with flooded areas contributes to its mild and damp winters, with an average minimum temperature of 9 °C (48 °F) in July. Temperatures can drop below 0 °C (32 °F) on the coldest days. Daytime temperatures in winter are usually pleasant, around 19 °C (66 °F). However, during cold snaps, daytime temperatures might not rise above 10 °C (50 °F), and on rare occasions, above 5 °C (41 °F).

During summertime, the average temperature is around 25 °C (77 °F) at daytime, but it can get above 30 °C (86 °F) on the hottest days. However, temperatures above 21 °C (70 °F) at night are rare. Snowfall was experienced in 1889, 1892, 1912, 1928 (two days), 1942, 1955, 1957, 1962, 1975, 1988, 2013 and 2020. Huge accumulation, however, is rarer.

The terrain's flatness hinders water drainage after rain, therefore providing water vapor for the atmosphere. Cold fronts come year round, often from Antarctica and Argentina, bringing tropical storms in summer and cold winds and frost in the winter. They can move very quickly, with no more than one day between the start of the southern winds and the start of rain. Curitiba's weather is also influenced by the dry air masses that dominate Brazil's midwest most of the year, bringing hot and dry weather, sometimes even in winter.