Category: Extremes affecting Antarctica

Heat wave occuring from November 26 2025 to December 03 2025 at -64.5°S 159.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 8 days

Time span: November 26 2025 to December 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.4 °C
  • Mean temperature: 0.2 °C
  • Maximum temperature anomaly: 3.8 °C
  • Maximum temperature: 1.2 °C

Event center: -64.5°S 159.5°E

Area affected: 343080 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-26_to_2025-Dec-03_159.5_-64.5

Heat wave occuring from November 24 2025 to December 05 2025 at -64.0°S 269.0°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: November 24 2025 to December 05 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.0 °C
  • Mean temperature: 4.7 °C
  • Maximum temperature anomaly: 3.7 °C
  • Maximum temperature: 9.6 °C

Event center: -64.0°S 269.0°E

Area affected: 2360791 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-24_to_2025-Dec-05_269.0_-64.0

Cold spell occuring from November 23 2025 to December 02 2025 at -60.5°S 309.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 10 days

Time span: November 23 2025 to December 02 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.8 °C
  • Mean temperature: -3.7 °C
  • Minimum temperature anomaly: -6.4 °C
  • Minimum temperature: -15.0 °C

Event center: -60.5°S 309.0°E

Area affected: 374790 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-Nov-23_to_2025-Dec-02_309.0_-60.5

Heat wave occuring from November 23 2025 to November 30 2025 at -80.5°S 32.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 8 days

Time span: November 23 2025 to November 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.7 °C
  • Mean temperature: -25.7 °C
  • Maximum temperature anomaly: 6.2 °C
  • Maximum temperature: -20.4 °C

Event center: -80.5°S 32.5°E

Area affected: 215532 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-23_to_2025-Nov-30_32.5_-80.5

Cold spell occuring from November 12 2025 to November 23 2025 at -61.0°S 308.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica
  • Chile

Duration: 12 days

Time span: November 12 2025 to November 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.4 °C
  • Mean temperature: 0.1 °C
  • Minimum temperature anomaly: -8.2 °C
  • Minimum temperature: -19.6 °C

Event center: -61.0°S 308.0°E

Area affected: 3939474 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-Nov-12_to_2025-Nov-23_308.0_-61.0

Cold spell occuring from November 08 2025 to November 13 2025 at -76.0°S 332.0°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: November 08 2025 to November 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.3 °C
  • Mean temperature: -15.1 °C
  • Minimum temperature anomaly: -7.0 °C
  • Minimum temperature: -23.8 °C

Event center: -76.0°S 332.0°E

Area affected: 83240 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-Nov-08_to_2025-Nov-13_332.0_-76.0

Cold spell occuring from November 08 2025 to November 17 2025 at -69.0°S 37.5°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 10 days

Time span: November 08 2025 to November 17 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.0 °C
  • Mean temperature: -10.6 °C
  • Minimum temperature anomaly: -7.7 °C
  • Minimum temperature: -22.0 °C

Event center: -69.0°S 37.5°E

Area affected: 492268 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-Nov-08_to_2025-Nov-17_37.5_-69.0

Cold spell occuring from November 07 2025 to November 13 2025 at -72.5°S 339.5°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 7 days

Time span: November 07 2025 to November 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.8 °C
  • Mean temperature: -12.8 °C
  • Minimum temperature anomaly: -8.3 °C
  • Minimum temperature: -18.4 °C

Event center: -72.5°S 339.5°E

Area affected: 58965 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-Nov-07_to_2025-Nov-13_339.5_-72.5

Cold spell occuring from November 07 2025 to November 17 2025 at -84.5°S 292.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 11 days

Time span: November 07 2025 to November 17 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.4 °C
  • Mean temperature: -32.4 °C
  • Minimum temperature anomaly: -8.6 °C
  • Minimum temperature: -42.9 °C

Event center: -84.5°S 292.0°E

Area affected: 636307 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-Nov-07_to_2025-Nov-17_292.0_-84.5

Cold spell occuring from November 06 2025 to November 12 2025 at -75.5°S 296.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 7 days

Time span: November 06 2025 to November 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.7 °C
  • Mean temperature: -20.8 °C
  • Minimum temperature anomaly: -8.8 °C
  • Minimum temperature: -26.4 °C

Event center: -75.5°S 296.0°E

Area affected: 93432 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-Nov-06_to_2025-Nov-12_296.0_-75.5