Author: WEXA

Heat wave occuring from December 03 2025 to December 11 2025 at 7.5°N 349.0°E

Download data: JSON

Event type: Heat wave

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

  • Liberia
  • Sierra Leone

Duration: 9 days

Time span: December 03 2025 to December 11 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.0 °C
  • Mean temperature: 27.1 °C
  • Maximum temperature anomaly: 1.5 °C
  • Maximum temperature: 28.3 °C

Event center: 7.5°N 349.0°E

Area affected: 61233 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-11_349.0_7.5

Cold spell occuring from December 03 2025 to December 11 2025 at -7.5°S 290.0°E

Download data: JSON

Event type: Cold spell

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

  • Bolivia, Plurinational State of
  • Brazil
  • Peru

Duration: 9 days

Time span: December 03 2025 to December 11 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.5 °C
  • Mean temperature: 24.2 °C
  • Minimum temperature anomaly: -2.5 °C
  • Minimum temperature: 23.2 °C

Event center: -7.5°S 290.0°E

Area affected: 256431 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-11_290.0_-7.5

Heat wave occuring from December 02 2025 to January 02 2026 at -8.5°S 110.0°E

Download data: JSON

Event type: Heat wave

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

  • Australia
  • India
  • Indonesia
  • Malaysia

Duration: 32 days

Time span: December 02 2025 to January 02 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 28.0 °C
  • Maximum temperature anomaly: 7.3 °C
  • Maximum temperature: 39.1 °C

Event center: -8.5°S 110.0°E

Area affected: 4683354 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-02_to_2026-Jan-02_110.0_-8.5

Heat wave occuring from December 01 2025 to December 07 2025 at 62.0°N 4.0°E

Download data: JSON

Event type: Heat wave

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

  • Norway

Duration: 7 days

Time span: December 01 2025 to December 07 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.7 °C
  • Mean temperature: 9.4 °C
  • Maximum temperature anomaly: 4.5 °C
  • Maximum temperature: 10.4 °C

Event center: 62.0°N 4.0°E

Area affected: 162785 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-01_to_2025-Dec-07_4.0_62.0

Heat wave occuring from December 01 2025 to December 08 2025 at 21.0°N 259.0°E

Download data: JSON

Event type: Heat wave

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

  • Mexico

Duration: 8 days

Time span: December 01 2025 to December 08 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.9 °C
  • Mean temperature: 16.9 °C
  • Maximum temperature anomaly: 5.0 °C
  • Maximum temperature: 19.8 °C

Event center: 21.0°N 259.0°E

Area affected: 89228 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-01_to_2025-Dec-08_259.0_21.0

Cold spell occuring from November 30 2025 to December 02 2025 at -36.0°S 148.0°E

Download data: JSON

Event type: Cold spell

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

  • Australia

Duration: 3 days

Time span: November 30 2025 to December 02 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -7.1 °C
  • Mean temperature: 13.8 °C
  • Minimum temperature anomaly: -10.3 °C
  • Minimum temperature: 3.9 °C

Event center: -36.0°S 148.0°E

Area affected: 181964 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-30_to_2025-Dec-02_148.0_-36.0

Cold spell occuring from November 30 2025 to December 05 2025 at 39.5°N 270.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 6 days

Time span: November 30 2025 to December 05 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -7.8 °C
  • Mean temperature: -3.0 °C
  • Minimum temperature anomaly: -15.4 °C
  • Minimum temperature: -16.5 °C

Event center: 39.5°N 270.5°E

Area affected: 1211131 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-30_to_2025-Dec-05_270.5_39.5

Cold spell occuring from November 30 2025 to December 03 2025 at 49.0°N 105.0°E

Download data: JSON

Event type: Cold spell

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

  • Mongolia
  • Russian Federation

Duration: 4 days

Time span: November 30 2025 to December 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -10.4 °C
  • Mean temperature: -26.3 °C
  • Minimum temperature anomaly: -16.8 °C
  • Minimum temperature: -34.2 °C

Event center: 49.0°N 105.0°E

Area affected: 108825 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-30_to_2025-Dec-03_105.0_49.0

Cold spell occuring from November 30 2025 to December 03 2025 at 49.0°N 119.5°E

Download data: JSON

Event type: Cold spell

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

  • China
  • Mongolia

Duration: 4 days

Time span: November 30 2025 to December 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -9.3 °C
  • Mean temperature: -26.9 °C
  • Minimum temperature anomaly: -12.5 °C
  • Minimum temperature: -30.6 °C

Event center: 49.0°N 119.5°E

Area affected: 61582 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-30_to_2025-Dec-03_119.5_49.0

Heat wave occuring from November 30 2025 to December 12 2025 at 34.5°N 97.0°E

Download data: JSON

Event type: Heat wave

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

  • China

Duration: 13 days

Time span: November 30 2025 to December 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.5 °C
  • Mean temperature: -9.2 °C
  • Maximum temperature anomaly: 10.8 °C
  • Maximum temperature: -3.6 °C

Event center: 34.5°N 97.0°E

Area affected: 109589 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-30_to_2025-Dec-12_97.0_34.5