Author: WEXA

Heat wave occuring from December 13 2025 to December 18 2025 at 45.5°N 91.5°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Kazakhstan
  • Mongolia
  • Russian Federation

Duration: 6 days

Time span: December 13 2025 to December 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 8.1 °C
  • Mean temperature: -8.7 °C
  • Maximum temperature anomaly: 14.2 °C
  • Maximum temperature: 0.2 °C

Event center: 45.5°N 91.5°E

Area affected: 776249 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_91.5_45.5

Cold spell occuring from December 13 2025 to December 17 2025 at 3.5°N 303.0°E

Download data: JSON

Event type: Cold spell

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

  • Brazil
  • Guyana
  • Suriname

Duration: 5 days

Time span: December 13 2025 to December 17 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.8 °C
  • Mean temperature: 24.8 °C
  • Minimum temperature anomaly: -3.0 °C
  • Minimum temperature: 23.6 °C

Event center: 3.5°N 303.0°E

Area affected: 74081 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-13_to_2025-Dec-17_303.0_3.5

Cold spell occuring from December 13 2025 to December 18 2025 at 62.0°N 127.0°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 13 2025 to December 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -12.6 °C
  • Mean temperature: -43.8 °C
  • Minimum temperature anomaly: -20.4 °C
  • Minimum temperature: -50.6 °C

Event center: 62.0°N 127.0°E

Area affected: 243358 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-13_to_2025-Dec-18_127.0_62.0

Cold spell occuring from December 13 2025 to December 16 2025 at -71.5°S 349.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 4 days

Time span: December 13 2025 to December 16 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.6 °C
  • Mean temperature: -15.7 °C
  • Minimum temperature anomaly: -5.2 °C
  • Minimum temperature: -22.6 °C

Event center: -71.5°S 349.0°E

Area affected: 52515 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-13_to_2025-Dec-16_349.0_-71.5

Heat wave occuring from December 12 2025 to December 15 2025 at 12.5°N 277.5°E

Download data: JSON

Event type: Heat wave

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

  • Colombia

Duration: 4 days

Time span: December 12 2025 to December 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.0 °C
  • Mean temperature: 27.5 °C
  • Maximum temperature anomaly: 1.5 °C
  • Maximum temperature: 27.9 °C

Event center: 12.5°N 277.5°E

Area affected: 54301 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-12_to_2025-Dec-15_277.5_12.5

Cold spell occuring from December 12 2025 to December 17 2025 at 2.5°N 99.0°E

Download data: JSON

Event type: Cold spell

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

  • Indonesia
  • Malaysia

Duration: 6 days

Time span: December 12 2025 to December 17 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.3 °C
  • Mean temperature: 24.6 °C
  • Minimum temperature anomaly: -2.2 °C
  • Minimum temperature: 20.4 °C

Event center: 2.5°N 99.0°E

Area affected: 148303 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-12_to_2025-Dec-17_99.0_2.5

Cold spell occuring from December 12 2025 to December 16 2025 at 41.5°N 282.5°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 5 days

Time span: December 12 2025 to December 16 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -10.0 °C
  • Mean temperature: -9.0 °C
  • Minimum temperature anomaly: -17.2 °C
  • Minimum temperature: -15.4 °C

Event center: 41.5°N 282.5°E

Area affected: 145745 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-12_to_2025-Dec-16_282.5_41.5

Cold spell occuring from December 12 2025 to December 16 2025 at 39.5°N 272.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 5 days

Time span: December 12 2025 to December 16 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -11.8 °C
  • Mean temperature: -12.6 °C
  • Minimum temperature anomaly: -19.9 °C
  • Minimum temperature: -20.7 °C

Event center: 39.5°N 272.0°E

Area affected: 193183 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-12_to_2025-Dec-16_272.0_39.5

Cold spell occuring from December 12 2025 to December 15 2025 at -47.5°S 288.0°E

Download data: JSON

Event type: Cold spell

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

  • Argentina
  • Chile

Duration: 4 days

Time span: December 12 2025 to December 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.7 °C
  • Mean temperature: 6.5 °C
  • Minimum temperature anomaly: -6.2 °C
  • Minimum temperature: -3.9 °C

Event center: -47.5°S 288.0°E

Area affected: 419339 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-12_to_2025-Dec-15_288.0_-47.5

Cold spell occuring from December 12 2025 to December 17 2025 at 16.5°N 55.0°E

Download data: JSON

Event type: Cold spell

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

  • Oman
  • Yemen

Duration: 6 days

Time span: December 12 2025 to December 17 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.3 °C
  • Mean temperature: 23.4 °C
  • Minimum temperature anomaly: -2.3 °C
  • Minimum temperature: 20.7 °C

Event center: 16.5°N 55.0°E

Area affected: 175188 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-12_to_2025-Dec-17_55.0_16.5