Author: WEXA

Cold spell occuring from October 09 2025 to October 18 2025 at 36.5°N 241.5°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 10 days

Time span: October 09 2025 to October 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.3 °C
  • Mean temperature: 9.2 °C
  • Minimum temperature anomaly: -14.3 °C
  • Minimum temperature: -6.8 °C

Event center: 36.5°N 241.5°E

Area affected: 342770 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-Oct-09_to_2025-Oct-18_241.5_36.5

Cold spell occuring from October 08 2025 to October 12 2025 at -5.5°S 300.5°E

Download data: JSON

Event type: Cold spell

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

  • Brazil

Duration: 5 days

Time span: October 08 2025 to October 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.0 °C
  • Mean temperature: 25.2 °C
  • Minimum temperature anomaly: -3.7 °C
  • Minimum temperature: 23.5 °C

Event center: -5.5°S 300.5°E

Area affected: 67781 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-Oct-08_to_2025-Oct-12_300.5_-5.5

Cold spell occuring from October 08 2025 to October 12 2025 at -8.0°S 300.5°E

Download data: JSON

Event type: Cold spell

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

  • Brazil

Duration: 5 days

Time span: October 08 2025 to October 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.8 °C
  • Mean temperature: 24.7 °C
  • Minimum temperature anomaly: -2.8 °C
  • Minimum temperature: 23.5 °C

Event center: -8.0°S 300.5°E

Area affected: 101065 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-Oct-08_to_2025-Oct-12_300.5_-8.0

Cold spell occuring from October 08 2025 to November 01 2025 at -61.0°S 124.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica
  • New Zealand

Duration: 25 days

Time span: October 08 2025 to November 01 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.1 °C
  • Mean temperature: -4.0 °C
  • Minimum temperature anomaly: -10.5 °C
  • Minimum temperature: -21.0 °C

Event center: -61.0°S 124.0°E

Area affected: 7011770 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-Oct-08_to_2025-Nov-01_124.0_-61.0

Cold spell occuring from October 08 2025 to October 11 2025 at 37.0°N 115.0°E

Download data: JSON

Event type: Cold spell

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

  • China

Duration: 4 days

Time span: October 08 2025 to October 11 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.9 °C
  • Mean temperature: 10.0 °C
  • Minimum temperature anomaly: -8.3 °C
  • Minimum temperature: 4.4 °C

Event center: 37.0°N 115.0°E

Area affected: 126103 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-Oct-08_to_2025-Oct-11_115.0_37.0

Heat wave occuring from October 08 2025 to October 20 2025 at -48.0°S 326.0°E

Download data: JSON

Event type: Heat wave

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

  • Argentina
  • Brazil
  • Uruguay

Duration: 13 days

Time span: October 08 2025 to October 20 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.8 °C
  • Mean temperature: 12.2 °C
  • Maximum temperature anomaly: 6.8 °C
  • Maximum temperature: 21.7 °C

Event center: -48.0°S 326.0°E

Area affected: 3738272 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-Oct-08_to_2025-Oct-20_326.0_-48.0

Cold spell occuring from October 07 2025 to October 10 2025 at 71.5°N 98.5°E

Download data: JSON

Event type: Cold spell

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

  • Russian Federation

Duration: 4 days

Time span: October 07 2025 to October 10 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -9.3 °C
  • Mean temperature: -16.3 °C
  • Minimum temperature anomaly: -12.3 °C
  • Minimum temperature: -20.1 °C

Event center: 71.5°N 98.5°E

Area affected: 63980 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-Oct-07_to_2025-Oct-10_98.5_71.5

Heat wave occuring from October 07 2025 to October 10 2025 at -39.0°S 289.0°E

Download data: JSON

Event type: Heat wave

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

  • Argentina
  • Chile

Duration: 4 days

Time span: October 07 2025 to October 10 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.7 °C
  • Mean temperature: 12.7 °C
  • Maximum temperature anomaly: 8.4 °C
  • Maximum temperature: 23.4 °C

Event center: -39.0°S 289.0°E

Area affected: 97210 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-Oct-07_to_2025-Oct-10_289.0_-39.0

Heat wave occuring from October 07 2025 to October 09 2025 at 56.0°N 203.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 3 days

Time span: October 07 2025 to October 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.4 °C
  • Mean temperature: 10.6 °C
  • Maximum temperature anomaly: 4.3 °C
  • Maximum temperature: 11.3 °C

Event center: 56.0°N 203.5°E

Area affected: 64436 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-Oct-07_to_2025-Oct-09_203.5_56.0

Heat wave occuring from October 07 2025 to October 09 2025 at 46.0°N 304.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 3 days

Time span: October 07 2025 to October 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.2 °C
  • Mean temperature: 15.4 °C
  • Maximum temperature anomaly: 7.7 °C
  • Maximum temperature: 22.0 °C

Event center: 46.0°N 304.5°E

Area affected: 283100 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-Oct-07_to_2025-Oct-09_304.5_46.0