Author: WEXA

Cold spell occuring from December 08 2025 to December 10 2025 at 55.5°N 91.0°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 08 2025 to December 10 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -16.0 °C
  • Mean temperature: -30.8 °C
  • Minimum temperature anomaly: -21.5 °C
  • Minimum temperature: -36.9 °C

Event center: 55.5°N 91.0°E

Area affected: 208091 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-08_to_2025-Dec-10_91.0_55.5

Cold spell occuring from December 08 2025 to December 11 2025 at -22.0°S 209.5°E

Download data: JSON

Event type: Cold spell

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

  • French Polynesia

Duration: 4 days

Time span: December 08 2025 to December 11 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.4 °C
  • Mean temperature: 23.7 °C
  • Minimum temperature anomaly: -1.8 °C
  • Minimum temperature: 22.5 °C

Event center: -22.0°S 209.5°E

Area affected: 57611 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-08_to_2025-Dec-11_209.5_-22.0

Cold spell occuring from December 08 2025 to December 14 2025 at -25.5°S 306.5°E

Download data: JSON

Event type: Cold spell

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

  • Brazil
  • Paraguay

Duration: 7 days

Time span: December 08 2025 to December 14 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.3 °C
  • Mean temperature: 21.5 °C
  • Minimum temperature anomaly: -6.3 °C
  • Minimum temperature: 17.4 °C

Event center: -25.5°S 306.5°E

Area affected: 90448 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-08_to_2025-Dec-14_306.5_-25.5

Heat wave occuring from December 07 2025 to December 11 2025 at -2.0°S 137.0°E

Download data: JSON

Event type: Heat wave

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

  • Papua New Guinea

Duration: 5 days

Time span: December 07 2025 to December 11 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.0 °C
  • Mean temperature: 28.3 °C
  • Maximum temperature anomaly: 1.8 °C
  • Maximum temperature: 29.0 °C

Event center: -2.0°S 137.0°E

Area affected: 169943 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-07_to_2025-Dec-11_137.0_-2.0

Heat wave occuring from December 07 2025 to December 11 2025 at -63.0°S 284.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 5 days

Time span: December 07 2025 to December 11 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.9 °C
  • Mean temperature: 3.2 °C
  • Maximum temperature anomaly: 2.8 °C
  • Maximum temperature: 5.4 °C

Event center: -63.0°S 284.5°E

Area affected: 164308 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-07_to_2025-Dec-11_284.5_-63.0

Cold spell occuring from December 07 2025 to December 09 2025 at 58.0°N 89.5°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 07 2025 to December 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -16.4 °C
  • Mean temperature: -33.5 °C
  • Minimum temperature anomaly: -21.2 °C
  • Minimum temperature: -39.5 °C

Event center: 58.0°N 89.5°E

Area affected: 51335 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-07_to_2025-Dec-09_89.5_58.0

Cold spell occuring from December 06 2025 to December 13 2025 at -8.0°S 138.0°E

Download data: JSON

Event type: Cold spell

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

  • Indonesia
  • Papua New Guinea

Duration: 8 days

Time span: December 06 2025 to December 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.3 °C
  • Mean temperature: 26.2 °C
  • Minimum temperature anomaly: -2.9 °C
  • Minimum temperature: 24.7 °C

Event center: -8.0°S 138.0°E

Area affected: 180335 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-06_to_2025-Dec-13_138.0_-8.0

Cold spell occuring from December 06 2025 to December 09 2025 at 51.0°N 299.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 4 days

Time span: December 06 2025 to December 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -8.8 °C
  • Mean temperature: -18.4 °C
  • Minimum temperature anomaly: -12.1 °C
  • Minimum temperature: -22.3 °C

Event center: 51.0°N 299.5°E

Area affected: 62474 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-06_to_2025-Dec-09_299.5_51.0

Heat wave occuring from December 06 2025 to December 18 2025 at 18.5°N 47.0°E

Download data: JSON

Event type: Heat wave

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

  • Oman
  • Saudi Arabia
  • Yemen

Duration: 13 days

Time span: December 06 2025 to December 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.1 °C
  • Mean temperature: 23.0 °C
  • Maximum temperature anomaly: 5.7 °C
  • Maximum temperature: 25.7 °C

Event center: 18.5°N 47.0°E

Area affected: 390405 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-06_to_2025-Dec-18_47.0_18.5

Cold spell occuring from December 05 2025 to December 08 2025 at -9.5°S 316.5°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 05 2025 to December 08 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.8 °C
  • Mean temperature: 23.8 °C
  • Minimum temperature anomaly: -4.0 °C
  • Minimum temperature: 21.6 °C

Event center: -9.5°S 316.5°E

Area affected: 82190 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-05_to_2025-Dec-08_316.5_-9.5