Category: Extremes affecting Antarctica

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 4 days

Time span: September 12 2025 to September 15 2025

Statistics over entire affected area:

• Mean temperature anomaly: -7.4 °C
• Mean temperature: -19.5 °C
• Minimum temperature anomaly: -9.5 °C
• Minimum temperature: -22.3 °C

Event center: -64.0°S 109.5°E

Area affected: 176790 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-12_to_2025-Sep-15_109.5_-64.0

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 6 days

Time span: September 04 2025 to September 09 2025

Statistics over entire affected area:

• Mean temperature anomaly: -8.0 °C
• Mean temperature: -27.0 °C
• Minimum temperature anomaly: -11.3 °C
• Minimum temperature: -34.4 °C

Event center: -69.5°S 19.5°E

Area affected: 128264 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-04_to_2025-Sep-09_19.5_-69.5

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 5 days

Time span: September 02 2025 to September 06 2025

Statistics over entire affected area:

• Mean temperature anomaly: -8.7 °C
• Mean temperature: -68.3 °C
• Minimum temperature anomaly: -11.5 °C
• Minimum temperature: -72.5 °C

Event center: -77.5°S 36.0°E

Area affected: 54481 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-02_to_2025-Sep-06_36.0_-77.5

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 4 days

Time span: September 02 2025 to September 05 2025

Statistics over entire affected area:

• Mean temperature anomaly: -7.9 °C
• Mean temperature: -68.4 °C
• Minimum temperature anomaly: -10.7 °C
• Minimum temperature: -73.7 °C

Event center: -77.5°S 45.0°E

Area affected: 55557 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-02_to_2025-Sep-05_45.0_-77.5

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 11 days

Time span: September 01 2025 to September 11 2025

Statistics over entire affected area:

• Mean temperature anomaly: -9.7 °C
• Mean temperature: -22.3 °C
• Minimum temperature anomaly: -13.6 °C
• Minimum temperature: -31.9 °C

Event center: -71.5°S 300.0°E

Area affected: 2044138 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-01_to_2025-Sep-11_300.0_-71.5