Author: WEXA

Heat wave occuring from December 04 2025 to December 16 2025 at -70.5°S 299.0°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 13 days

Time span: December 04 2025 to December 16 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.2 °C
  • Mean temperature: -0.3 °C
  • Maximum temperature anomaly: 6.6 °C
  • Maximum temperature: 1.9 °C

Event center: -70.5°S 299.0°E

Area affected: 198961 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-04_to_2025-Dec-16_299.0_-70.5

Heat wave occuring from December 03 2025 to December 15 2025 at -65.5°S 295.0°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 13 days

Time span: December 03 2025 to December 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.1 °C
  • Mean temperature: -4.2 °C
  • Maximum temperature anomaly: 9.4 °C
  • Maximum temperature: 3.5 °C

Event center: -65.5°S 295.0°E

Area affected: 1376359 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-03_to_2025-Dec-15_295.0_-65.5

Cold spell occuring from December 03 2025 to December 08 2025 at 70.0°N 89.5°E

Download data: JSON

Event type: Cold spell

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

  • Russian Federation

Duration: 6 days

Time span: December 03 2025 to December 08 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -12.3 °C
  • Mean temperature: -37.6 °C
  • Minimum temperature anomaly: -20.7 °C
  • Minimum temperature: -44.9 °C

Event center: 70.0°N 89.5°E

Area affected: 62622 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-03_to_2025-Dec-08_89.5_70.0

Cold spell occuring from December 03 2025 to December 09 2025 at -13.5°S 300.5°E

Download data: JSON

Event type: Cold spell

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

  • Bolivia, Plurinational State of
  • Brazil

Duration: 7 days

Time span: December 03 2025 to December 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.9 °C
  • Mean temperature: 23.7 °C
  • Minimum temperature anomaly: -3.7 °C
  • Minimum temperature: 21.7 °C

Event center: -13.5°S 300.5°E

Area affected: 329690 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-03_to_2025-Dec-09_300.5_-13.5

Heat wave occuring from December 03 2025 to December 09 2025 at -84.0°S 162.5°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 03 2025 to December 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.5 °C
  • Mean temperature: -17.3 °C
  • Maximum temperature anomaly: 6.9 °C
  • Maximum temperature: -7.9 °C

Event center: -84.0°S 162.5°E

Area affected: 69135 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-03_to_2025-Dec-09_162.5_-84.0

Heat wave occuring from December 03 2025 to December 07 2025 at -35.5°S 301.5°E

Download data: JSON

Event type: Heat wave

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

  • Argentina
  • Uruguay

Duration: 5 days

Time span: December 03 2025 to December 07 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.1 °C
  • Mean temperature: 25.4 °C
  • Maximum temperature anomaly: 8.3 °C
  • Maximum temperature: 29.2 °C

Event center: -35.5°S 301.5°E

Area affected: 430113 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-03_to_2025-Dec-07_301.5_-35.5

Heat wave occuring from December 03 2025 to December 06 2025 at -3.5°S 15.5°E

Download data: JSON

Event type: Heat wave

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

  • Congo
  • Congo, The Democratic Republic of the
  • Gabon

Duration: 4 days

Time span: December 03 2025 to December 06 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 25.3 °C
  • Maximum temperature anomaly: 1.9 °C
  • Maximum temperature: 26.7 °C

Event center: -3.5°S 15.5°E

Area affected: 55543 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-03_to_2025-Dec-06_15.5_-3.5

Heat wave occuring from December 03 2025 to December 13 2025 at -24.5°S 119.5°E

Download data: JSON

Event type: Heat wave

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

  • Australia

Duration: 11 days

Time span: December 03 2025 to December 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.2 °C
  • Mean temperature: 34.6 °C
  • Maximum temperature anomaly: 10.0 °C
  • Maximum temperature: 38.7 °C

Event center: -24.5°S 119.5°E

Area affected: 1458665 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-03_to_2025-Dec-13_119.5_-24.5

Heat wave occuring from December 03 2025 to December 05 2025 at 59.5°N 109.0°E

Download data: JSON

Event type: Heat wave

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

  • Russian Federation

Duration: 3 days

Time span: December 03 2025 to December 05 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 13.1 °C
  • Mean temperature: -6.7 °C
  • Maximum temperature anomaly: 19.1 °C
  • Maximum temperature: -2.5 °C

Event center: 59.5°N 109.0°E

Area affected: 121039 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-03_to_2025-Dec-05_109.0_59.5

Cold spell occuring from December 03 2025 to December 10 2025 at -8.5°S 127.0°E

Download data: JSON

Event type: Cold spell

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

  • Timor-Leste

Duration: 8 days

Time span: December 03 2025 to December 10 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.0 °C
  • Mean temperature: 26.7 °C
  • Minimum temperature anomaly: -1.9 °C
  • Minimum temperature: 24.6 °C

Event center: -8.5°S 127.0°E

Area affected: 165621 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-03_to_2025-Dec-10_127.0_-8.5