Category: Extremes affecting China

Heat wave occuring from May 24 2025 to May 28 2025 at 38.0°N 87.5°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: May 24 2025 to May 28 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.5 °C
  • Mean temperature: 8.9 °C
  • Maximum temperature anomaly: 8.9 °C
  • Maximum temperature: 25.5 °C

Event center: 38.0°N 87.5°E

Area affected: 105161 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-May-24_to_2025-May-28_87.5_38.0

Cold spell occuring from May 23 2025 to June 01 2025 at 51.0°N 87.0°E

Download data: JSON

Event type: Cold spell

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

  • China
  • Kazakhstan
  • Mongolia
  • Russian Federation

Duration: 10 days

Time span: May 23 2025 to June 01 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -7.8 °C
  • Mean temperature: 1.9 °C
  • Minimum temperature anomaly: -14.0 °C
  • Minimum temperature: -9.5 °C

Event center: 51.0°N 87.0°E

Area affected: 2793049 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-May-23_to_2025-Jun-01_87.0_51.0

Cold spell occuring from May 23 2025 to May 30 2025 at 26.0°N 100.5°E

Download data: JSON

Event type: Cold spell

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

  • China
  • Lao People’s Democratic Republic
  • Myanmar
  • Thailand
  • Viet Nam

Duration: 8 days

Time span: May 23 2025 to May 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.2 °C
  • Mean temperature: 19.5 °C
  • Minimum temperature anomaly: -9.5 °C
  • Minimum temperature: -1.7 °C

Event center: 26.0°N 100.5°E

Area affected: 1164357 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-May-23_to_2025-May-30_100.5_26.0

Cold spell occuring from May 17 2025 to May 25 2025 at 29.5°N 90.0°E

Download data: JSON

Event type: Cold spell

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

  • China

Duration: 9 days

Time span: May 17 2025 to May 25 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.0 °C
  • Mean temperature: 0.2 °C
  • Minimum temperature anomaly: -6.4 °C
  • Minimum temperature: -4.9 °C

Event center: 29.5°N 90.0°E

Area affected: 106517 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-May-17_to_2025-May-25_90.0_29.5

Heat wave occuring from May 16 2025 to June 23 2025 at 62.5°N 164.5°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Mongolia
  • Russian Federation

Duration: 39 days

Time span: May 16 2025 to June 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 7.9 °C
  • Mean temperature: 14.3 °C
  • Maximum temperature anomaly: 17.9 °C
  • Maximum temperature: 27.8 °C

Event center: 62.5°N 164.5°E

Area affected: 5092485 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-May-16_to_2025-Jun-23_164.5_62.5

Cold spell occuring from May 15 2025 to May 24 2025 at 53.5°N 126.5°E

Download data: JSON

Event type: Cold spell

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

  • China
  • Mongolia
  • Russian Federation

Duration: 10 days

Time span: May 15 2025 to May 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.4 °C
  • Mean temperature: 5.6 °C
  • Minimum temperature anomaly: -11.9 °C
  • Minimum temperature: -1.2 °C

Event center: 53.5°N 126.5°E

Area affected: 885049 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-May-15_to_2025-May-24_126.5_53.5

Cold spell occuring from May 15 2025 to May 25 2025 at 31.0°N 97.0°E

Download data: JSON

Event type: Cold spell

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

  • China

Duration: 11 days

Time span: May 15 2025 to May 25 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.5 °C
  • Mean temperature: -0.1 °C
  • Minimum temperature anomaly: -7.0 °C
  • Minimum temperature: -4.1 °C

Event center: 31.0°N 97.0°E

Area affected: 79414 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-May-15_to_2025-May-25_97.0_31.0

Heat wave occuring from May 12 2025 to May 16 2025 at 41.0°N 129.0°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Korea, Democratic People’s Republic of

Duration: 5 days

Time span: May 12 2025 to May 16 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.3 °C
  • Mean temperature: 16.8 °C
  • Maximum temperature anomaly: 9.0 °C
  • Maximum temperature: 20.8 °C

Event center: 41.0°N 129.0°E

Area affected: 92724 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-May-12_to_2025-May-16_129.0_41.0

Heat wave occuring from May 11 2025 to May 16 2025 at 35.0°N 113.5°E

Download data: JSON

Event type: Heat wave

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

  • China

Duration: 6 days

Time span: May 11 2025 to May 16 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.7 °C
  • Mean temperature: 25.4 °C
  • Maximum temperature anomaly: 8.4 °C
  • Maximum temperature: 30.7 °C

Event center: 35.0°N 113.5°E

Area affected: 75830 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-May-11_to_2025-May-16_113.5_35.0

Heat wave occuring from May 08 2025 to May 13 2025 at 29.0°N 94.0°E

Download data: JSON

Event type: Heat wave

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

  • China

Duration: 6 days

Time span: May 08 2025 to May 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.9 °C
  • Mean temperature: 10.1 °C
  • Maximum temperature anomaly: 4.5 °C
  • Maximum temperature: 21.2 °C

Event center: 29.0°N 94.0°E

Area affected: 62307 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-May-08_to_2025-May-13_94.0_29.0