São Paulo Records Lowest June Maximum Temperature in 30 Years

São Paulo recorded its lowest maximum temperature for the month of June in 30 years on Thursday, June 25, 2024 ^[1].

This temperature anomaly highlights an extreme shift in winter patterns for the Brazilian metropolis. Such records can signal broader climatic instability or the influence of specific atmospheric blocks that trap cold air over the region.

The Defesa Civil of São Paulo said the city's maximum temperature reached only 13.4°C ^[1]. This figure represents the coolest June high the city has seen in three decades [1, 3]. According to the Defesa Civil de São Paulo, "A capital paulista atingiu 13,4 °C" ^[1].

While the citywide maximum set a long-term record, other areas of the city experienced even more severe drops. In the Parelheiros district, a record low minimum temperature for the year was documented at -0.7°C ^[2]. This measurement underscores the significant temperature variance across the city's diverse geography, from the urban center to the more rural outskirts.

Local authorities monitored the conditions as the unseasonably cold weather persisted. The discrepancy between the citywide maximum and the district minimum illustrates how localized microclimates can intensify the effects of a cold front. The record-breaking nature of the 13.4°C high is particularly notable because maximum temperatures typically remain higher during the day, even in winter months ^[1].

Data from the civil defense indicates that the 30-year comparison period provides the necessary context for this event ^[3]. The intersection of a record-low daily high and a record-low annual minimum in Parelheiros suggests a particularly aggressive cold wave hit the region during the final week of June 2024 [1, 2].