Author: WEXA

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

Heat wave occuring from December 19 2025 to December 21 2025 at 39.5°N 146.0°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: 6.2 °C
  • Mean temperature: 9.2 °C
  • Maximum temperature anomaly: 11.9 °C
  • Maximum temperature: 16.1 °C

Event center: 39.5°N 146.0°E

Area affected: 135220 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_146.0_39.5

Cold spell occuring from December 18 2025 to December 27 2025 at 33.0°N 51.0°E

Download data: JSON

Event type: Cold spell

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

  • Iran, Islamic Republic of

Duration: 10 days

Time span: December 18 2025 to December 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.0 °C
  • Mean temperature: -0.7 °C
  • Minimum temperature anomaly: -13.0 °C
  • Minimum temperature: -15.2 °C

Event center: 33.0°N 51.0°E

Area affected: 215040 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-18_to_2025-Dec-27_51.0_33.0

Cold spell occuring from December 18 2025 to December 24 2025 at 62.5°N 100.5°E

Download data: JSON

Event type: Cold spell

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

  • Russian Federation

Duration: 7 days

Time span: December 18 2025 to December 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -16.2 °C
  • Mean temperature: -41.8 °C
  • Minimum temperature anomaly: -24.7 °C
  • Minimum temperature: -52.0 °C

Event center: 62.5°N 100.5°E

Area affected: 1233322 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-18_to_2025-Dec-24_100.5_62.5

Cold spell occuring from December 18 2025 to December 26 2025 at 13.5°N 75.5°E

Download data: JSON

Event type: Cold spell

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

  • India
  • Sri Lanka

Duration: 9 days

Time span: December 18 2025 to December 26 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.8 °C
  • Mean temperature: 22.0 °C
  • Minimum temperature anomaly: -3.3 °C
  • Minimum temperature: 16.7 °C

Event center: 13.5°N 75.5°E

Area affected: 271576 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-18_to_2025-Dec-26_75.5_13.5

Cold spell occuring from December 18 2025 to December 23 2025 at 22.5°N 2.0°E

Download data: JSON

Event type: Cold spell

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

  • Algeria
  • Mali

Duration: 6 days

Time span: December 18 2025 to December 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.7 °C
  • Mean temperature: 14.2 °C
  • Minimum temperature anomaly: -4.8 °C
  • Minimum temperature: 12.2 °C

Event center: 22.5°N 2.0°E

Area affected: 57402 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-18_to_2025-Dec-23_2.0_22.5

Cold spell occuring from December 18 2025 to January 06 2026 at -21.0°S 141.5°E

Download data: JSON

Event type: Cold spell

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

  • Australia

Duration: 20 days

Time span: December 18 2025 to January 06 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -4.8 °C
  • Mean temperature: 24.9 °C
  • Minimum temperature anomaly: -10.2 °C
  • Minimum temperature: 18.8 °C

Event center: -21.0°S 141.5°E

Area affected: 1035489 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-18_to_2026-Jan-06_141.5_-21.0