Author: WEXA

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

Heat wave occuring from December 14 2025 to December 16 2025 at 73.0°N 133.0°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 14 2025 to December 16 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 9.0 °C
  • Mean temperature: -17.6 °C
  • Maximum temperature anomaly: 13.9 °C
  • Maximum temperature: -15.2 °C

Event center: 73.0°N 133.0°E

Area affected: 75623 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-16_133.0_73.0

Cold spell occuring from December 14 2025 to January 01 2026 at -81.0°S 167.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 19 days

Time span: December 14 2025 to January 01 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -4.3 °C
  • Mean temperature: -23.8 °C
  • Minimum temperature anomaly: -7.9 °C
  • Minimum temperature: -34.1 °C

Event center: -81.0°S 167.0°E

Area affected: 1802623 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-14_to_2026-Jan-01_167.0_-81.0

Heat wave occuring from December 13 2025 to December 18 2025 at 21.0°N 6.0°E

Download data: JSON

Event type: Heat wave

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

  • Algeria
  • Mali
  • Niger

Duration: 6 days

Time span: December 13 2025 to December 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.5 °C
  • Mean temperature: 23.5 °C
  • Maximum temperature anomaly: 6.3 °C
  • Maximum temperature: 26.3 °C

Event center: 21.0°N 6.0°E

Area affected: 133913 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-13_to_2025-Dec-18_6.0_21.0

Heat wave occuring from December 13 2025 to December 16 2025 at 18.0°N 94.5°E

Download data: JSON

Event type: Heat wave

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

  • Myanmar

Duration: 4 days

Time span: December 13 2025 to December 16 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.4 °C
  • Mean temperature: 26.9 °C
  • Maximum temperature anomaly: 2.3 °C
  • Maximum temperature: 27.5 °C

Event center: 18.0°N 94.5°E

Area affected: 52912 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-13_to_2025-Dec-16_94.5_18.0

Heat wave occuring from December 13 2025 to December 19 2025 at -26.0°S 39.5°E

Download data: JSON

Event type: Heat wave

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

  • Madagascar

Duration: 7 days

Time span: December 13 2025 to December 19 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.8 °C
  • Mean temperature: 27.6 °C
  • Maximum temperature anomaly: 4.5 °C
  • Maximum temperature: 31.0 °C

Event center: -26.0°S 39.5°E

Area affected: 159756 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-13_to_2025-Dec-19_39.5_-26.0

Heat wave occuring from December 13 2025 to December 15 2025 at -33.5°S 169.0°E

Download data: JSON

Event type: Heat wave

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

  • New Zealand

Duration: 3 days

Time span: December 13 2025 to December 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.2 °C
  • Mean temperature: 19.3 °C
  • Maximum temperature anomaly: 2.8 °C
  • Maximum temperature: 21.5 °C

Event center: -33.5°S 169.0°E

Area affected: 193096 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-13_to_2025-Dec-15_169.0_-33.5