Category: Cold spells 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 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

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 5 days

Time span: August 24 2025 to August 28 2025

Statistics over entire affected area:

• Mean temperature anomaly: -9.2 °C
• Mean temperature: -27.4 °C
• Minimum temperature anomaly: -11.5 °C
• Minimum temperature: -30.7 °C

Event center: -63.5°S 320.0°E

Area affected: 249667 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-Aug-24_to_2025-Aug-28_320.0_-63.5

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 8 days

Time span: August 16 2025 to August 23 2025

Statistics over entire affected area:

• Mean temperature anomaly: -10.7 °C
• Mean temperature: -38.5 °C
• Minimum temperature anomaly: -13.0 °C
• Minimum temperature: -49.8 °C

Event center: -68.5°S 155.5°E

Area affected: 62927 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-Aug-16_to_2025-Aug-23_155.5_-68.5

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 10 days

Time span: August 14 2025 to August 23 2025

Statistics over entire affected area:

• Mean temperature anomaly: -8.1 °C
• Mean temperature: -29.6 °C
• Minimum temperature anomaly: -12.2 °C
• Minimum temperature: -39.8 °C

Event center: -70.0°S 161.5°E

Area affected: 62542 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-Aug-14_to_2025-Aug-23_161.5_-70.0

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 12 days

Time span: August 12 2025 to August 23 2025

Statistics over entire affected area:

• Mean temperature anomaly: -7.7 °C
• Mean temperature: -18.4 °C
• Minimum temperature anomaly: -15.1 °C
• Minimum temperature: -51.7 °C

Event center: -65.5°S 64.0°E

Area affected: 2519463 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-Aug-12_to_2025-Aug-23_64.0_-65.5

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 6 days

Time span: August 09 2025 to August 14 2025

Statistics over entire affected area:

• Mean temperature anomaly: -11.4 °C
• Mean temperature: -44.8 °C
• Minimum temperature anomaly: -17.7 °C
• Minimum temperature: -51.4 °C

Event center: -77.0°S 234.5°E

Area affected: 87065 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-Aug-09_to_2025-Aug-14_234.5_-77.0

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 4 days

Time span: July 31 2025 to August 03 2025

Statistics over entire affected area:

• Mean temperature anomaly: -8.4 °C
• Mean temperature: -23.1 °C
• Minimum temperature anomaly: -11.7 °C
• Minimum temperature: -36.0 °C

Event center: -65.0°S 103.0°E

Area affected: 54029 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-Jul-31_to_2025-Aug-03_103.0_-65.0

Download data: JSON

Event type: Cold spell

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

• Antarctica

Duration: 12 days

Time span: July 30 2025 to August 10 2025

Statistics over entire affected area:

• Mean temperature anomaly: -9.0 °C
• Mean temperature: -36.6 °C
• Minimum temperature anomaly: -15.6 °C
• Minimum temperature: -60.0 °C

Event center: -63.0°S 57.0°E

Area affected: 1700334 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-Jul-30_to_2025-Aug-10_57.0_-63.0