Category: Extremes affecting Antarctica

Heat wave occuring from January 31 2026 to February 05 2026 at -75.5°S 16.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 6 days

Time span: January 31 2026 to February 05 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 6.3 °C
  • Mean temperature: -24.6 °C
  • Maximum temperature anomaly: 10.6 °C
  • Maximum temperature: -1.7 °C

Event center: -75.5°S 16.5°E

Area affected: 958528 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_2026-Jan-31_to_2026-Feb-05_16.5_-75.5

Heat wave occuring from January 23 2026 to February 01 2026 at -73.0°S 335.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 10 days

Time span: January 23 2026 to February 01 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.6 °C
  • Mean temperature: -0.3 °C
  • Maximum temperature anomaly: 4.9 °C
  • Maximum temperature: 0.6 °C

Event center: -73.0°S 335.5°E

Area affected: 100811 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_2026-Jan-23_to_2026-Feb-01_335.5_-73.0

Cold spell occuring from January 23 2026 to February 01 2026 at -84.5°S 206.0°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: January 23 2026 to February 01 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -5.3 °C
  • Mean temperature: -16.2 °C
  • Minimum temperature anomaly: -9.0 °C
  • Minimum temperature: -19.7 °C

Event center: -84.5°S 206.0°E

Area affected: 243223 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_2026-Jan-23_to_2026-Feb-01_206.0_-84.5

Cold spell occuring from January 11 2026 to January 22 2026 at -68.0°S 153.5°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 12 days

Time span: January 11 2026 to January 22 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -4.3 °C
  • Mean temperature: -18.6 °C
  • Minimum temperature anomaly: -7.9 °C
  • Minimum temperature: -33.4 °C

Event center: -68.0°S 153.5°E

Area affected: 307928 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_2026-Jan-11_to_2026-Jan-22_153.5_-68.0

Cold spell occuring from January 09 2026 to January 17 2026 at -70.5°S 114.0°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: January 09 2026 to January 17 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -5.0 °C
  • Mean temperature: -30.3 °C
  • Minimum temperature anomaly: -7.5 °C
  • Minimum temperature: -36.0 °C

Event center: -70.5°S 114.0°E

Area affected: 476030 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_2026-Jan-09_to_2026-Jan-17_114.0_-70.5

Cold spell occuring from January 08 2026 to January 20 2026 at -85.0°S 210.0°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: January 08 2026 to January 20 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -4.1 °C
  • Mean temperature: -25.4 °C
  • Minimum temperature anomaly: -8.2 °C
  • Minimum temperature: -34.6 °C

Event center: -85.0°S 210.0°E

Area affected: 918637 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_2026-Jan-08_to_2026-Jan-20_210.0_-85.0

Heat wave occuring from December 30 2025 to January 01 2026 at -74.5°S 257.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 3 days

Time span: December 30 2025 to January 01 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 3.3 °C
  • Mean temperature: -1.6 °C
  • Maximum temperature anomaly: 5.2 °C
  • Maximum temperature: 2.0 °C

Event center: -74.5°S 257.5°E

Area affected: 196564 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-Dec-30_to_2026-Jan-01_257.5_-74.5

Heat wave occuring from December 28 2025 to January 03 2026 at -65.0°S 280.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 7 days

Time span: December 28 2025 to January 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.5 °C
  • Mean temperature: 2.4 °C
  • Maximum temperature anomaly: 2.6 °C
  • Maximum temperature: 5.5 °C

Event center: -65.0°S 280.5°E

Area affected: 632095 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-Dec-28_to_2026-Jan-03_280.5_-65.0

Heat wave occuring from December 21 2025 to January 01 2026 at -68.0°S 289.5°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: December 21 2025 to January 01 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 1.4 °C
  • Maximum temperature anomaly: 2.5 °C
  • Maximum temperature: 2.8 °C

Event center: -68.0°S 289.5°E

Area affected: 92172 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-Dec-21_to_2026-Jan-01_289.5_-68.0

Cold spell occuring from December 20 2025 to December 26 2025 at -73.0°S 230.0°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: December 20 2025 to December 26 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.7 °C
  • Mean temperature: -2.6 °C
  • Minimum temperature anomaly: -4.9 °C
  • Minimum temperature: -10.9 °C

Event center: -73.0°S 230.0°E

Area affected: 887714 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-Dec-20_to_2025-Dec-26_230.0_-73.0