Author: WEXA

Cold spell occuring from December 21 2025 to December 26 2025 at 66.5°N 147.0°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 21 2025 to December 26 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -9.4 °C
  • Mean temperature: -43.3 °C
  • Minimum temperature anomaly: -18.2 °C
  • Minimum temperature: -55.1 °C

Event center: 66.5°N 147.0°E

Area affected: 301913 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-21_to_2025-Dec-26_147.0_66.5

Heat wave occuring from December 21 2025 to January 01 2026 at -68.0°S 289.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 12 days

Time span: December 21 2025 to January 01 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 1.4 °C
  • Maximum temperature anomaly: 2.5 °C
  • Maximum temperature: 2.8 °C

Event center: -68.0°S 289.5°E

Area affected: 92172 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-21_to_2026-Jan-01_289.5_-68.0

Cold spell occuring from December 21 2025 to January 12 2026 at -8.5°S 281.0°E

Download data: JSON

Event type: Cold spell

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

  • Ecuador
  • Peru

Duration: 23 days

Time span: December 21 2025 to January 12 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -1.4 °C
  • Mean temperature: 21.6 °C
  • Minimum temperature anomaly: -3.0 °C
  • Minimum temperature: 8.8 °C

Event center: -8.5°S 281.0°E

Area affected: 852315 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-21_to_2026-Jan-12_281.0_-8.5

Cold spell occuring from December 20 2025 to December 26 2025 at -73.0°S 230.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 7 days

Time span: December 20 2025 to December 26 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.7 °C
  • Mean temperature: -2.6 °C
  • Minimum temperature anomaly: -4.9 °C
  • Minimum temperature: -10.9 °C

Event center: -73.0°S 230.0°E

Area affected: 887714 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-20_to_2025-Dec-26_230.0_-73.0

Cold spell occuring from December 20 2025 to December 26 2025 at -5.0°S 309.0°E

Download data: JSON

Event type: Cold spell

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

  • Brazil

Duration: 7 days

Time span: December 20 2025 to December 26 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.3 °C
  • Mean temperature: 24.2 °C
  • Minimum temperature anomaly: -5.9 °C
  • Minimum temperature: 21.6 °C

Event center: -5.0°S 309.0°E

Area affected: 893135 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-20_to_2025-Dec-26_309.0_-5.0

Cold spell occuring from December 20 2025 to December 31 2025 at 65.5°N 129.5°E

Download data: JSON

Event type: Cold spell

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

  • Russian Federation

Duration: 12 days

Time span: December 20 2025 to December 31 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -10.3 °C
  • Mean temperature: -45.4 °C
  • Minimum temperature anomaly: -16.4 °C
  • Minimum temperature: -54.0 °C

Event center: 65.5°N 129.5°E

Area affected: 318983 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-20_to_2025-Dec-31_129.5_65.5

Cold spell occuring from December 20 2025 to January 02 2026 at -37.0°S 154.0°E

Download data: JSON

Event type: Cold spell

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

  • Australia

Duration: 14 days

Time span: December 20 2025 to January 02 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -2.9 °C
  • Mean temperature: 14.7 °C
  • Minimum temperature anomaly: -8.6 °C
  • Minimum temperature: 2.2 °C

Event center: -37.0°S 154.0°E

Area affected: 2246055 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-20_to_2026-Jan-02_154.0_-37.0

Cold spell occuring from December 19 2025 to January 02 2026 at -67.0°S 50.5°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 15 days

Time span: December 19 2025 to January 02 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -1.7 °C
  • Mean temperature: -3.4 °C
  • Minimum temperature anomaly: -5.0 °C
  • Minimum temperature: -10.5 °C

Event center: -67.0°S 50.5°E

Area affected: 157113 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-19_to_2026-Jan-02_50.5_-67.0

Cold spell occuring from December 19 2025 to December 25 2025 at -15.5°S 321.0°E

Download data: JSON

Event type: Cold spell

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

  • Brazil

Duration: 7 days

Time span: December 19 2025 to December 25 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.5 °C
  • Mean temperature: 24.3 °C
  • Minimum temperature anomaly: -3.4 °C
  • Minimum temperature: 20.1 °C

Event center: -15.5°S 321.0°E

Area affected: 261830 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-19_to_2025-Dec-25_321.0_-15.5

Heat wave occuring from December 19 2025 to December 21 2025 at 35.0°N 140.0°E

Download data: JSON

Event type: Heat wave

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

  • Japan

Duration: 3 days

Time span: December 19 2025 to December 21 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.8 °C
  • Mean temperature: 16.6 °C
  • Maximum temperature anomaly: 10.5 °C
  • Maximum temperature: 21.0 °C

Event center: 35.0°N 140.0°E

Area affected: 131031 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-19_to_2025-Dec-21_140.0_35.0