Category: Extremes affecting China

Heat wave occuring from September 26 2025 to September 30 2025 at 45.5°N 80.5°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Kazakhstan

Duration: 5 days

Time span: September 26 2025 to September 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.8 °C
  • Mean temperature: 18.4 °C
  • Maximum temperature anomaly: 7.4 °C
  • Maximum temperature: 22.2 °C

Event center: 45.5°N 80.5°E

Area affected: 64628 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-26_to_2025-Sep-30_80.5_45.5

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

Cold spell occuring from September 23 2025 to October 20 2025 at 32.0°N 78.5°E

Download data: JSON

Event type: Cold spell

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

  • Afghanistan
  • China
  • India
  • Nepal
  • Pakistan

Duration: 28 days

Time span: September 23 2025 to October 20 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.3 °C
  • Mean temperature: 20.2 °C
  • Minimum temperature anomaly: -13.8 °C
  • Minimum temperature: -21.8 °C

Event center: 32.0°N 78.5°E

Area affected: 2700912 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-23_to_2025-Oct-20_78.5_32.0

Heat wave occuring from September 23 2025 to September 27 2025 at 34.0°N 103.5°E

Download data: JSON

Event type: Heat wave

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

  • China

Duration: 5 days

Time span: September 23 2025 to September 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.7 °C
  • Mean temperature: 11.5 °C
  • Maximum temperature anomaly: 6.0 °C
  • Maximum temperature: 18.8 °C

Event center: 34.0°N 103.5°E

Area affected: 177722 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-23_to_2025-Sep-27_103.5_34.0

Cold spell occuring from September 21 2025 to September 23 2025 at 34.5°N 110.5°E

Download data: JSON

Event type: Cold spell

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

  • China

Duration: 3 days

Time span: September 21 2025 to September 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.5 °C
  • Mean temperature: 13.7 °C
  • Minimum temperature anomaly: -6.2 °C
  • Minimum temperature: 9.6 °C

Event center: 34.5°N 110.5°E

Area affected: 101889 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-21_to_2025-Sep-23_110.5_34.5

Cold spell occuring from September 17 2025 to September 19 2025 at 33.0°N 112.5°E

Download data: JSON

Event type: Cold spell

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

  • China

Duration: 3 days

Time span: September 17 2025 to September 19 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.5 °C
  • Mean temperature: 13.7 °C
  • Minimum temperature anomaly: -8.2 °C
  • Minimum temperature: 8.8 °C

Event center: 33.0°N 112.5°E

Area affected: 112458 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-17_to_2025-Sep-19_112.5_33.0

Heat wave occuring from September 10 2025 to September 12 2025 at 43.0°N 112.0°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Mongolia

Duration: 3 days

Time span: September 10 2025 to September 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.7 °C
  • Mean temperature: 21.9 °C
  • Maximum temperature anomaly: 7.2 °C
  • Maximum temperature: 24.1 °C

Event center: 43.0°N 112.0°E

Area affected: 68109 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-10_to_2025-Sep-12_112.0_43.0

Heat wave occuring from September 08 2025 to September 18 2025 at 36.5°N 104.5°E

Download data: JSON

Event type: Heat wave

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

  • China

Duration: 11 days

Time span: September 08 2025 to September 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.7 °C
  • Mean temperature: 21.0 °C
  • Maximum temperature anomaly: 8.5 °C
  • Maximum temperature: 30.5 °C

Event center: 36.5°N 104.5°E

Area affected: 644619 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-08_to_2025-Sep-18_104.5_36.5

Cold spell occuring from August 27 2025 to August 30 2025 at 33.0°N 103.5°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: August 27 2025 to August 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.5 °C
  • Mean temperature: 10.8 °C
  • Minimum temperature anomaly: -10.0 °C
  • Minimum temperature: -0.1 °C

Event center: 33.0°N 103.5°E

Area affected: 240326 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-27_to_2025-Aug-30_103.5_33.0

Cold spell occuring from August 23 2025 to September 08 2025 at 34.0°N 77.0°E

Download data: JSON

Event type: Cold spell

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

  • China
  • India
  • Pakistan

Duration: 17 days

Time span: August 23 2025 to September 08 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.4 °C
  • Mean temperature: 9.6 °C
  • Minimum temperature anomaly: -11.6 °C
  • Minimum temperature: -14.5 °C

Event center: 34.0°N 77.0°E

Area affected: 1124350 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-23_to_2025-Sep-08_77.0_34.0