Category: Extremes affecting Antarctica

Heat wave occuring from November 05 2025 to November 08 2025 at -74.5°S 222.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 4 days

Time span: November 05 2025 to November 08 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.8 °C
  • Mean temperature: -7.3 °C
  • Maximum temperature anomaly: 8.4 °C
  • Maximum temperature: -2.3 °C

Event center: -74.5°S 222.5°E

Area affected: 83311 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-Nov-05_to_2025-Nov-08_222.5_-74.5

Heat wave occuring from October 30 2025 to November 14 2025 at -59.0°S 250.0°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 16 days

Time span: October 30 2025 to November 14 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.6 °C
  • Mean temperature: 5.6 °C
  • Maximum temperature anomaly: 7.3 °C
  • Maximum temperature: 18.4 °C

Event center: -59.0°S 250.0°E

Area affected: 8088936 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-30_to_2025-Nov-14_250.0_-59.0

Cold spell occuring from October 29 2025 to November 06 2025 at -64.5°S 3.5°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 9 days

Time span: October 29 2025 to November 06 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.8 °C
  • Mean temperature: -10.0 °C
  • Minimum temperature anomaly: -6.2 °C
  • Minimum temperature: -12.6 °C

Event center: -64.5°S 3.5°E

Area affected: 627475 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-29_to_2025-Nov-06_3.5_-64.5

Heat wave occuring from October 25 2025 to October 29 2025 at -76.0°S 273.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 5 days

Time span: October 25 2025 to October 29 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 9.2 °C
  • Mean temperature: -14.7 °C
  • Maximum temperature anomaly: 13.7 °C
  • Maximum temperature: -3.2 °C

Event center: -76.0°S 273.5°E

Area affected: 176769 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-25_to_2025-Oct-29_273.5_-76.0

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 23 2025 to November 03 2025 at -77.0°S 197.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 12 days

Time span: October 23 2025 to November 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.9 °C
  • Mean temperature: -6.3 °C
  • Maximum temperature anomaly: 12.6 °C
  • Maximum temperature: -0.4 °C

Event center: -77.0°S 197.5°E

Area affected: 1132124 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-23_to_2025-Nov-03_197.5_-77.0

Cold spell occuring from October 18 2025 to October 23 2025 at -73.5°S 242.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 6 days

Time span: October 18 2025 to October 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -8.9 °C
  • Mean temperature: -31.1 °C
  • Minimum temperature anomaly: -13.2 °C
  • Minimum temperature: -39.7 °C

Event center: -73.5°S 242.0°E

Area affected: 423974 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-18_to_2025-Oct-23_242.0_-73.5

Cold spell occuring from October 16 2025 to October 28 2025 at -84.0°S 295.5°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 13 days

Time span: October 16 2025 to October 28 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.3 °C
  • Mean temperature: -37.7 °C
  • Minimum temperature anomaly: -10.0 °C
  • Minimum temperature: -46.7 °C

Event center: -84.0°S 295.5°E

Area affected: 478354 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-16_to_2025-Oct-28_295.5_-84.0

Cold spell occuring from October 08 2025 to November 01 2025 at -61.0°S 124.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica
  • New Zealand

Duration: 25 days

Time span: October 08 2025 to November 01 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.1 °C
  • Mean temperature: -4.0 °C
  • Minimum temperature anomaly: -10.5 °C
  • Minimum temperature: -21.0 °C

Event center: -61.0°S 124.0°E

Area affected: 7011770 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-08_to_2025-Nov-01_124.0_-61.0

Cold spell occuring from October 04 2025 to October 12 2025 at -75.0°S 220.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 9 days

Time span: October 04 2025 to October 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -12.2 °C
  • Mean temperature: -37.5 °C
  • Minimum temperature anomaly: -22.5 °C
  • Minimum temperature: -46.5 °C

Event center: -75.0°S 220.0°E

Area affected: 674357 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-04_to_2025-Oct-12_220.0_-75.0