Category: Extremes affecting Argentina

Cold spell occuring from October 26 2025 to November 01 2025 at -18.0°S 297.0°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
  • Chile
  • Paraguay
  • Peru
  • Uruguay

Duration: 7 days

Time span: October 26 2025 to November 01 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.4 °C
  • Mean temperature: 14.2 °C
  • Minimum temperature anomaly: -13.6 °C
  • Minimum temperature: -1.0 °C

Event center: -18.0°S 297.0°E

Area affected: 2424586 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-Oct-26_to_2025-Nov-01_297.0_-18.0

Heat wave occuring from October 24 2025 to November 02 2025 at -56.5°S 313.0°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica
  • Argentina
  • Chile

Duration: 10 days

Time span: October 24 2025 to November 02 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.8 °C
  • Mean temperature: 1.8 °C
  • Maximum temperature anomaly: 14.6 °C
  • Maximum temperature: 15.8 °C

Event center: -56.5°S 313.0°E

Area affected: 5229526 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-Oct-24_to_2025-Nov-02_313.0_-56.5

Heat wave occuring from October 21 2025 to October 24 2025 at -30.5°S 296.5°E

Download data: JSON

Event type: Heat wave

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

  • Argentina

Duration: 4 days

Time span: October 21 2025 to October 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.6 °C
  • Mean temperature: 28.7 °C
  • Maximum temperature anomaly: 8.7 °C
  • Maximum temperature: 33.1 °C

Event center: -30.5°S 296.5°E

Area affected: 80361 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-Oct-21_to_2025-Oct-24_296.5_-30.5

Heat wave occuring from October 19 2025 to October 29 2025 at -49.5°S 315.0°E

Download data: JSON

Event type: Heat wave

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

  • Argentina
  • Brazil
  • Uruguay

Duration: 11 days

Time span: October 19 2025 to October 29 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.6 °C
  • Mean temperature: 14.0 °C
  • Maximum temperature anomaly: 5.3 °C
  • Maximum temperature: 21.9 °C

Event center: -49.5°S 315.0°E

Area affected: 3288239 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-Oct-19_to_2025-Oct-29_315.0_-49.5

Heat wave occuring from October 18 2025 to October 23 2025 at -55.0°S 300.0°E

Download data: JSON

Event type: Heat wave

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

  • Argentina
  • Chile

Duration: 6 days

Time span: October 18 2025 to October 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.6 °C
  • Mean temperature: 8.3 °C
  • Maximum temperature anomaly: 7.2 °C
  • Maximum temperature: 16.3 °C

Event center: -55.0°S 300.0°E

Area affected: 191245 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-Oct-18_to_2025-Oct-23_300.0_-55.0

Cold spell occuring from October 17 2025 to November 01 2025 at -24.5°S 314.0°E

Download data: JSON

Event type: Cold spell

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

  • Argentina
  • Brazil
  • Paraguay

Duration: 16 days

Time span: October 17 2025 to November 01 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.1 °C
  • Mean temperature: 18.7 °C
  • Minimum temperature anomaly: -9.4 °C
  • Minimum temperature: 8.6 °C

Event center: -24.5°S 314.0°E

Area affected: 6147334 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-Oct-17_to_2025-Nov-01_314.0_-24.5

Heat wave occuring from October 13 2025 to October 23 2025 at -30.5°S 290.5°E

Download data: JSON

Event type: Heat wave

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

  • Argentina
  • Chile

Duration: 11 days

Time span: October 13 2025 to October 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.3 °C
  • Mean temperature: 8.7 °C
  • Maximum temperature anomaly: 6.4 °C
  • Maximum temperature: 20.8 °C

Event center: -30.5°S 290.5°E

Area affected: 71331 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-Oct-13_to_2025-Oct-23_290.5_-30.5

Heat wave occuring from October 08 2025 to October 20 2025 at -48.0°S 326.0°E

Download data: JSON

Event type: Heat wave

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

  • Argentina
  • Brazil
  • Uruguay

Duration: 13 days

Time span: October 08 2025 to October 20 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.8 °C
  • Mean temperature: 12.2 °C
  • Maximum temperature anomaly: 6.8 °C
  • Maximum temperature: 21.7 °C

Event center: -48.0°S 326.0°E

Area affected: 3738272 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-Oct-08_to_2025-Oct-20_326.0_-48.0

Heat wave occuring from October 07 2025 to October 10 2025 at -39.0°S 289.0°E

Download data: JSON

Event type: Heat wave

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

  • Argentina
  • Chile

Duration: 4 days

Time span: October 07 2025 to October 10 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.7 °C
  • Mean temperature: 12.7 °C
  • Maximum temperature anomaly: 8.4 °C
  • Maximum temperature: 23.4 °C

Event center: -39.0°S 289.0°E

Area affected: 97210 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-Oct-07_to_2025-Oct-10_289.0_-39.0

Cold spell occuring from October 07 2025 to October 09 2025 at -20.5°S 299.0°E

Download data: JSON

Event type: Cold spell

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

  • Argentina
  • Bolivia, Plurinational State of
  • Paraguay

Duration: 3 days

Time span: October 07 2025 to October 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.9 °C
  • Mean temperature: 19.5 °C
  • Minimum temperature anomaly: -9.0 °C
  • Minimum temperature: 17.2 °C

Event center: -20.5°S 299.0°E

Area affected: 80100 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-Oct-07_to_2025-Oct-09_299.0_-20.5