Author: WEXA

Cold spell occuring from December 12 2025 to December 24 2025 at -17.5°S 48.0°E

Download data: JSON

Event type: Cold spell

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

  • Madagascar

Duration: 13 days

Time span: December 12 2025 to December 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.4 °C
  • Mean temperature: 23.5 °C
  • Minimum temperature anomaly: -2.6 °C
  • Minimum temperature: 16.4 °C

Event center: -17.5°S 48.0°E

Area affected: 143081 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-24_48.0_-17.5

Cold spell occuring from December 11 2025 to December 22 2025 at 76.0°N 274.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 12 days

Time span: December 11 2025 to December 22 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -7.7 °C
  • Mean temperature: -34.6 °C
  • Minimum temperature anomaly: -14.8 °C
  • Minimum temperature: -44.7 °C

Event center: 76.0°N 274.5°E

Area affected: 137064 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-11_to_2025-Dec-22_274.5_76.0

Heat wave occuring from December 11 2025 to December 15 2025 at 19.0°N 265.0°E

Download data: JSON

Event type: Heat wave

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

  • Mexico

Duration: 5 days

Time span: December 11 2025 to December 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.6 °C
  • Mean temperature: 24.9 °C
  • Maximum temperature anomaly: 4.5 °C
  • Maximum temperature: 26.4 °C

Event center: 19.0°N 265.0°E

Area affected: 143792 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-11_to_2025-Dec-15_265.0_19.0

Cold spell occuring from December 11 2025 to December 18 2025 at 71.0°N 77.0°E

Download data: JSON

Event type: Cold spell

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

  • Russian Federation

Duration: 8 days

Time span: December 11 2025 to December 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -15.0 °C
  • Mean temperature: -35.0 °C
  • Minimum temperature anomaly: -21.5 °C
  • Minimum temperature: -41.9 °C

Event center: 71.0°N 77.0°E

Area affected: 219064 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-11_to_2025-Dec-18_77.0_71.0

Cold spell occuring from December 11 2025 to December 26 2025 at 26.0°N 170.5°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 16 days

Time span: December 11 2025 to December 26 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.3 °C
  • Mean temperature: 21.4 °C
  • Minimum temperature anomaly: -5.5 °C
  • Minimum temperature: 13.2 °C

Event center: 26.0°N 170.5°E

Area affected: 4154775 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-11_to_2025-Dec-26_170.5_26.0

Cold spell occuring from December 11 2025 to December 24 2025 at -23.0°S 22.5°E

Download data: JSON

Event type: Cold spell

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

  • Angola
  • Botswana
  • Namibia
  • South Africa
  • Zambia
  • Zimbabwe

Duration: 14 days

Time span: December 11 2025 to December 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.1 °C
  • Mean temperature: 22.1 °C
  • Minimum temperature anomaly: -6.5 °C
  • Minimum temperature: 19.3 °C

Event center: -23.0°S 22.5°E

Area affected: 889785 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-11_to_2025-Dec-24_22.5_-23.0

Cold spell occuring from December 11 2025 to December 30 2025 at 31.5°N 354.0°E

Download data: JSON

Event type: Cold spell

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

  • Morocco

Duration: 20 days

Time span: December 11 2025 to December 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.2 °C
  • Mean temperature: 3.1 °C
  • Minimum temperature anomaly: -8.2 °C
  • Minimum temperature: -6.0 °C

Event center: 31.5°N 354.0°E

Area affected: 136942 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-11_to_2025-Dec-30_354.0_31.5

Cold spell occuring from December 10 2025 to December 15 2025 at 76.5°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: 6 days

Time span: December 10 2025 to December 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -10.5 °C
  • Mean temperature: -35.5 °C
  • Minimum temperature anomaly: -17.7 °C
  • Minimum temperature: -46.9 °C

Event center: 76.5°N 100.5°E

Area affected: 101850 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-10_to_2025-Dec-15_100.5_76.5

Cold spell occuring from December 10 2025 to December 17 2025 at 67.0°N 104.0°E

Download data: JSON

Event type: Cold spell

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

  • Russian Federation

Duration: 8 days

Time span: December 10 2025 to December 17 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -14.6 °C
  • Mean temperature: -44.7 °C
  • Minimum temperature anomaly: -22.6 °C
  • Minimum temperature: -53.5 °C

Event center: 67.0°N 104.0°E

Area affected: 843389 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-10_to_2025-Dec-17_104.0_67.0

Cold spell occuring from December 10 2025 to January 01 2026 at 15.0°N 342.5°E

Download data: JSON

Event type: Cold spell

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

  • Gambia
  • Guinea
  • Guinea-Bissau
  • Mali
  • Mauritania
  • Senegal

Duration: 23 days

Time span: December 10 2025 to January 01 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -2.6 °C
  • Mean temperature: 21.5 °C
  • Minimum temperature anomaly: -6.0 °C
  • Minimum temperature: 12.8 °C

Event center: 15.0°N 342.5°E

Area affected: 1618347 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-10_to_2026-Jan-01_342.5_15.0