Category: Extremes affecting Brazil

Cold spell occuring from September 04 2025 to September 07 2025 at -32.5°S 302.5°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Argentina
  • Brazil
  • Paraguay
  • Uruguay

Duration: 4 days

Time span: September 04 2025 to September 07 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.3 °C
  • Mean temperature: 9.0 °C
  • Minimum temperature anomaly: -8.3 °C
  • Minimum temperature: 4.0 °C

Event center: -32.5°S 302.5°E

Area affected: 583764 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2025-Sep-04_to_2025-Sep-07_302.5_-32.5

Cold spell occuring from September 02 2025 to September 09 2025 at -1.5°S 309.0°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Brazil

Duration: 8 days

Time span: September 02 2025 to September 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.1 °C
  • Mean temperature: 26.8 °C
  • Minimum temperature anomaly: -1.8 °C
  • Minimum temperature: 26.2 °C

Event center: -1.5°S 309.0°E

Area affected: 52533 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2025-Sep-02_to_2025-Sep-09_309.0_-1.5

Heat wave occuring from September 02 2025 to October 04 2025 at -1.5°S 318.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Brazil

Duration: 33 days

Time span: September 02 2025 to October 04 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 0.6 °C
  • Mean temperature: 27.0 °C
  • Maximum temperature anomaly: 1.5 °C
  • Maximum temperature: 30.8 °C

Event center: -1.5°S 318.0°E

Area affected: 1688525 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Sep-02_to_2025-Oct-04_318.0_-1.5

Cold spell occuring from August 31 2025 to September 06 2025 at -6.5°S 323.0°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Brazil

Duration: 7 days

Time span: August 31 2025 to September 06 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.5 °C
  • Mean temperature: 24.2 °C
  • Minimum temperature anomaly: -3.6 °C
  • Minimum temperature: 20.3 °C

Event center: -6.5°S 323.0°E

Area affected: 125753 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2025-Aug-31_to_2025-Sep-06_323.0_-6.5

Heat wave occuring from August 29 2025 to September 03 2025 at -32.5°S 307.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Brazil
  • Uruguay

Duration: 6 days

Time span: August 29 2025 to September 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.8 °C
  • Mean temperature: 16.2 °C
  • Maximum temperature anomaly: 6.3 °C
  • Maximum temperature: 21.7 °C

Event center: -32.5°S 307.0°E

Area affected: 173393 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Aug-29_to_2025-Sep-03_307.0_-32.5

Heat wave occuring from August 28 2025 to September 02 2025 at -10.5°S 296.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Bolivia, Plurinational State of
  • Brazil

Duration: 6 days

Time span: August 28 2025 to September 02 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.5 °C
  • Mean temperature: 28.9 °C
  • Maximum temperature anomaly: 3.9 °C
  • Maximum temperature: 30.2 °C

Event center: -10.5°S 296.0°E

Area affected: 127407 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Aug-28_to_2025-Sep-02_296.0_-10.5

Heat wave occuring from August 25 2025 to August 30 2025 at -5.0°S 317.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Brazil

Duration: 6 days

Time span: August 25 2025 to August 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.2 °C
  • Mean temperature: 29.6 °C
  • Maximum temperature anomaly: 1.6 °C
  • Maximum temperature: 32.0 °C

Event center: -5.0°S 317.5°E

Area affected: 55403 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Aug-25_to_2025-Aug-30_317.5_-5.0

Cold spell occuring from August 24 2025 to August 28 2025 at -19.5°S 294.5°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Argentina
  • Bolivia, Plurinational State of
  • Brazil
  • Paraguay
  • Peru

Duration: 5 days

Time span: August 24 2025 to August 28 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -7.9 °C
  • Mean temperature: 14.6 °C
  • Minimum temperature anomaly: -14.8 °C
  • Minimum temperature: -3.2 °C

Event center: -19.5°S 294.5°E

Area affected: 1258007 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2025-Aug-24_to_2025-Aug-28_294.5_-19.5

Cold spell occuring from August 21 2025 to August 27 2025 at -12.0°S 310.0°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Brazil

Duration: 7 days

Time span: August 21 2025 to August 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.9 °C
  • Mean temperature: 26.4 °C
  • Minimum temperature anomaly: -2.9 °C
  • Minimum temperature: 24.8 °C

Event center: -12.0°S 310.0°E

Area affected: 90646 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2025-Aug-21_to_2025-Aug-27_310.0_-12.0

Heat wave occuring from August 20 2025 to August 26 2025 at -22.5°S 313.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Brazil

Duration: 7 days

Time span: August 20 2025 to August 26 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.8 °C
  • Mean temperature: 22.6 °C
  • Maximum temperature anomaly: 6.6 °C
  • Maximum temperature: 26.4 °C

Event center: -22.5°S 313.5°E

Area affected: 145589 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Aug-20_to_2025-Aug-26_313.5_-22.5