Author: WEXA

Cold spell occuring from September 25 2025 to October 02 2025 at -61.5°S 248.0°E

Download data: JSON

Event type: Cold spell

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

  • Antarctica

Duration: 8 days

Time span: September 25 2025 to October 02 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.9 °C
  • Mean temperature: -6.5 °C
  • Minimum temperature anomaly: -9.3 °C
  • Minimum temperature: -14.4 °C

Event center: -61.5°S 248.0°E

Area affected: 448569 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-Sep-25_to_2025-Oct-02_248.0_-61.5

Cold spell occuring from September 25 2025 to September 28 2025 at 20.5°N 34.0°E

Download data: JSON

Event type: Cold spell

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

  • Egypt
  • Sudan

Duration: 4 days

Time span: September 25 2025 to September 28 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.6 °C
  • Mean temperature: 29.2 °C
  • Minimum temperature anomaly: -5.4 °C
  • Minimum temperature: 25.5 °C

Event center: 20.5°N 34.0°E

Area affected: 287787 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-Sep-25_to_2025-Sep-28_34.0_20.5

Heat wave occuring from September 25 2025 to October 08 2025 at -70.5°S 161.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 14 days

Time span: September 25 2025 to October 08 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 8.5 °C
  • Mean temperature: -17.6 °C
  • Maximum temperature anomaly: 18.5 °C
  • Maximum temperature: 3.7 °C

Event center: -70.5°S 161.5°E

Area affected: 1591014 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-Sep-25_to_2025-Oct-08_161.5_-70.5

Heat wave occuring from September 24 2025 to September 30 2025 at -79.0°S 277.5°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 7 days

Time span: September 24 2025 to September 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 7.2 °C
  • Mean temperature: -23.9 °C
  • Maximum temperature anomaly: 10.7 °C
  • Maximum temperature: -17.4 °C

Event center: -79.0°S 277.5°E

Area affected: 210431 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-Sep-24_to_2025-Sep-30_277.5_-79.0

Cold spell occuring from September 24 2025 to October 06 2025 at -9.0°S 322.0°E

Download data: JSON

Event type: Cold spell

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

  • Brazil

Duration: 13 days

Time span: September 24 2025 to October 06 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.3 °C
  • Mean temperature: 18.7 °C
  • Minimum temperature anomaly: -5.3 °C
  • Minimum temperature: 7.9 °C

Event center: -9.0°S 322.0°E

Area affected: 5074087 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-Sep-24_to_2025-Oct-06_322.0_-9.0

Cold spell occuring from September 24 2025 to September 27 2025 at 41.0°N 85.0°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: September 24 2025 to September 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.6 °C
  • Mean temperature: 14.1 °C
  • Minimum temperature anomaly: -6.9 °C
  • Minimum temperature: 0.1 °C

Event center: 41.0°N 85.0°E

Area affected: 121614 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-Sep-24_to_2025-Sep-27_85.0_41.0

Heat wave occuring from September 24 2025 to September 28 2025 at -51.5°S 290.0°E

Download data: JSON

Event type: Heat wave

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

  • Argentina
  • Chile

Duration: 5 days

Time span: September 24 2025 to September 28 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.7 °C
  • Mean temperature: 8.8 °C
  • Maximum temperature anomaly: 6.4 °C
  • Maximum temperature: 14.0 °C

Event center: -51.5°S 290.0°E

Area affected: 98346 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-Sep-24_to_2025-Sep-28_290.0_-51.5

Heat wave occuring from September 24 2025 to September 27 2025 at -15.0°S 299.0°E

Download data: JSON

Event type: Heat wave

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

  • Bolivia, Plurinational State of
  • Brazil

Duration: 4 days

Time span: September 24 2025 to September 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.6 °C
  • Mean temperature: 30.0 °C
  • Maximum temperature anomaly: 4.6 °C
  • Maximum temperature: 31.9 °C

Event center: -15.0°S 299.0°E

Area affected: 56584 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-Sep-24_to_2025-Sep-27_299.0_-15.0

Heat wave occuring from September 24 2025 to November 08 2025 at -75.5°S 96.0°E

Download data: JSON

Event type: Heat wave

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

  • Antarctica

Duration: 46 days

Time span: September 24 2025 to November 08 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 8.0 °C
  • Mean temperature: -21.9 °C
  • Maximum temperature anomaly: 21.4 °C
  • Maximum temperature: 9.1 °C

Event center: -75.5°S 96.0°E

Area affected: 18384209 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-Sep-24_to_2025-Nov-08_96.0_-75.5

Heat wave occuring from September 24 2025 to September 27 2025 at 34.5°N 280.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 4 days

Time span: September 24 2025 to September 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.6 °C
  • Mean temperature: 26.4 °C
  • Maximum temperature anomaly: 6.6 °C
  • Maximum temperature: 28.6 °C

Event center: 34.5°N 280.5°E

Area affected: 101166 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-Sep-24_to_2025-Sep-27_280.5_34.5