Author: WEXA

Cold spell occuring from December 26 2025 to January 04 2026 at -23.5°S 44.0°E

Download data: JSON

Event type: Cold spell

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

  • Madagascar
  • Réunion

Duration: 10 days

Time span: December 26 2025 to January 04 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -2.3 °C
  • Mean temperature: 19.8 °C
  • Minimum temperature anomaly: -5.3 °C
  • Minimum temperature: 8.5 °C

Event center: -23.5°S 44.0°E

Area affected: 3546993 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-26_to_2026-Jan-04_44.0_-23.5

Cold spell occuring from December 26 2025 to January 02 2026 at -14.5°S 35.5°E

Download data: JSON

Event type: Cold spell

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

  • Congo, The Democratic Republic of the
  • Malawi
  • Mozambique
  • Tanzania, United Republic of
  • Zambia

Duration: 8 days

Time span: December 26 2025 to January 02 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -2.5 °C
  • Mean temperature: 21.4 °C
  • Minimum temperature anomaly: -4.8 °C
  • Minimum temperature: 15.9 °C

Event center: -14.5°S 35.5°E

Area affected: 824278 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-26_to_2026-Jan-02_35.5_-14.5

Heat wave occuring from December 25 2025 to December 27 2025 at -4.0°S 14.0°E

Download data: JSON

Event type: Heat wave

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

  • Congo
  • Congo, The Democratic Republic of the

Duration: 3 days

Time span: December 25 2025 to December 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.7 °C
  • Mean temperature: 25.9 °C
  • Maximum temperature anomaly: 2.6 °C
  • Maximum temperature: 27.7 °C

Event center: -4.0°S 14.0°E

Area affected: 80229 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-25_to_2025-Dec-27_14.0_-4.0

Cold spell occuring from December 24 2025 to December 29 2025 at -22.5°S 291.5°E

Download data: JSON

Event type: Cold spell

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

  • Bolivia, Plurinational State of
  • Chile

Duration: 6 days

Time span: December 24 2025 to December 29 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.5 °C
  • Mean temperature: 12.7 °C
  • Minimum temperature anomaly: -4.6 °C
  • Minimum temperature: 2.1 °C

Event center: -22.5°S 291.5°E

Area affected: 62776 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-24_to_2025-Dec-29_291.5_-22.5

Heat wave occuring from December 24 2025 to January 01 2026 at 5.0°N 50.0°E

Download data: JSON

Event type: Heat wave

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

  • Somalia

Duration: 9 days

Time span: December 24 2025 to January 01 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 0.8 °C
  • Mean temperature: 26.8 °C
  • Maximum temperature anomaly: 1.5 °C
  • Maximum temperature: 28.3 °C

Event center: 5.0°N 50.0°E

Area affected: 89387 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-24_to_2026-Jan-01_50.0_5.0

Cold spell occuring from December 23 2025 to December 25 2025 at 61.0°N 57.0°E

Download data: JSON

Event type: Cold spell

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

  • Russian Federation

Duration: 3 days

Time span: December 23 2025 to December 25 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -17.2 °C
  • Mean temperature: -32.4 °C
  • Minimum temperature anomaly: -23.8 °C
  • Minimum temperature: -42.1 °C

Event center: 61.0°N 57.0°E

Area affected: 81412 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-23_to_2025-Dec-25_57.0_61.0

Cold spell occuring from December 23 2025 to December 28 2025 at -13.5°S 292.5°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: 6 days

Time span: December 23 2025 to December 28 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.0 °C
  • Mean temperature: 22.5 °C
  • Minimum temperature anomaly: -3.4 °C
  • Minimum temperature: 4.9 °C

Event center: -13.5°S 292.5°E

Area affected: 577492 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-23_to_2025-Dec-28_292.5_-13.5

Cold spell occuring from December 22 2025 to December 25 2025 at -9.0°S 324.5°E

Download data: JSON

Event type: Cold spell

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

  • Brazil

Duration: 4 days

Time span: December 22 2025 to December 25 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.1 °C
  • Mean temperature: 24.7 °C
  • Minimum temperature anomaly: -1.8 °C
  • Minimum temperature: 22.4 °C

Event center: -9.0°S 324.5°E

Area affected: 58130 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-22_to_2025-Dec-25_324.5_-9.0

Cold spell occuring from December 22 2025 to December 27 2025 at 59.0°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 22 2025 to December 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -11.4 °C
  • Mean temperature: -43.1 °C
  • Minimum temperature anomaly: -17.5 °C
  • Minimum temperature: -49.9 °C

Event center: 59.0°N 127.0°E

Area affected: 75412 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-22_to_2025-Dec-27_127.0_59.0

Heat wave occuring from December 22 2025 to January 05 2026 at -18.5°S 319.5°E

Download data: JSON

Event type: Heat wave

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

  • Brazil

Duration: 15 days

Time span: December 22 2025 to January 05 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 2.7 °C
  • Mean temperature: 27.2 °C
  • Maximum temperature anomaly: 5.7 °C
  • Maximum temperature: 32.2 °C

Event center: -18.5°S 319.5°E

Area affected: 1944050 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-22_to_2026-Jan-05_319.5_-18.5