Author: WEXA

Cold spell occuring from December 16 2025 to December 23 2025 at -24.5°S 291.0°E

Download data: JSON

Event type: Cold spell

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

  • Argentina
  • Chile

Duration: 8 days

Time span: December 16 2025 to December 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.2 °C
  • Mean temperature: 11.6 °C
  • Minimum temperature anomaly: -3.3 °C
  • Minimum temperature: 3.8 °C

Event center: -24.5°S 291.0°E

Area affected: 87408 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-16_to_2025-Dec-23_291.0_-24.5

Cold spell occuring from December 16 2025 to December 19 2025 at -16.5°S 299.0°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: 4 days

Time span: December 16 2025 to December 19 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.0 °C
  • Mean temperature: 23.2 °C
  • Minimum temperature anomaly: -5.3 °C
  • Minimum temperature: 19.8 °C

Event center: -16.5°S 299.0°E

Area affected: 62383 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-16_to_2025-Dec-19_299.0_-16.5

Cold spell occuring from December 16 2025 to December 20 2025 at 61.5°N 266.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 5 days

Time span: December 16 2025 to December 20 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -11.0 °C
  • Mean temperature: -36.5 °C
  • Minimum temperature anomaly: -15.4 °C
  • Minimum temperature: -41.8 °C

Event center: 61.5°N 266.0°E

Area affected: 68543 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-16_to_2025-Dec-20_266.0_61.5

Cold spell occuring from December 15 2025 to December 20 2025 at 69.0°N 53.5°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 15 2025 to December 20 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -14.1 °C
  • Mean temperature: -24.5 °C
  • Minimum temperature anomaly: -19.5 °C
  • Minimum temperature: -33.4 °C

Event center: 69.0°N 53.5°E

Area affected: 74725 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-15_to_2025-Dec-20_53.5_69.0

Cold spell occuring from December 15 2025 to December 25 2025 at 19.5°N 42.0°E

Download data: JSON

Event type: Cold spell

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

  • Oman
  • Saudi Arabia
  • United Arab Emirates
  • Yemen

Duration: 11 days

Time span: December 15 2025 to December 25 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.6 °C
  • Mean temperature: 13.7 °C
  • Minimum temperature anomaly: -9.5 °C
  • Minimum temperature: 5.3 °C

Event center: 19.5°N 42.0°E

Area affected: 1572345 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-15_to_2025-Dec-25_42.0_19.5

Cold spell occuring from December 15 2025 to December 21 2025 at 16.5°N 39.0°E

Download data: JSON

Event type: Cold spell

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

  • Eritrea
  • Ethiopia
  • Sudan

Duration: 7 days

Time span: December 15 2025 to December 21 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.9 °C
  • Mean temperature: 21.6 °C
  • Minimum temperature anomaly: -5.4 °C
  • Minimum temperature: 14.4 °C

Event center: 16.5°N 39.0°E

Area affected: 417917 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-15_to_2025-Dec-21_39.0_16.5

Cold spell occuring from December 15 2025 to December 18 2025 at 64.5°N 277.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 4 days

Time span: December 15 2025 to December 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -10.4 °C
  • Mean temperature: -32.2 °C
  • Minimum temperature anomaly: -16.3 °C
  • Minimum temperature: -40.8 °C

Event center: 64.5°N 277.0°E

Area affected: 59569 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-15_to_2025-Dec-18_277.0_64.5

Heat wave occuring from December 15 2025 to December 18 2025 at -3.0°S 108.0°E

Download data: JSON

Event type: Heat wave

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

  • Indonesia

Duration: 4 days

Time span: December 15 2025 to December 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.1 °C
  • Mean temperature: 27.7 °C
  • Maximum temperature anomaly: 2.1 °C
  • Maximum temperature: 28.4 °C

Event center: -3.0°S 108.0°E

Area affected: 67896 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-15_to_2025-Dec-18_108.0_-3.0

Heat wave occuring from December 14 2025 to December 19 2025 at -12.5°S 46.5°E

Download data: JSON

Event type: Heat wave

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

  • Madagascar

Duration: 6 days

Time span: December 14 2025 to December 19 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 0.8 °C
  • Mean temperature: 27.7 °C
  • Maximum temperature anomaly: 1.3 °C
  • Maximum temperature: 28.2 °C

Event center: -12.5°S 46.5°E

Area affected: 63406 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-14_to_2025-Dec-19_46.5_-12.5

Heat wave occuring from December 14 2025 to December 22 2025 at -65.5°S 322.0°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 9 days

Time span: December 14 2025 to December 22 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.4 °C
  • Mean temperature: 0.5 °C
  • Maximum temperature anomaly: 1.9 °C
  • Maximum temperature: 1.2 °C

Event center: -65.5°S 322.0°E

Area affected: 877385 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-14_to_2025-Dec-22_322.0_-65.5