Heat wave occuring from June 11 2025 to June 14 2025 at 49.0°N 87.0°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Kazakhstan
  • Mongolia
  • Russian Federation

Duration: 4 days

Time span: June 11 2025 to June 14 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.6 °C
  • Mean temperature: 15.3 °C
  • Maximum temperature anomaly: 8.2 °C
  • Maximum temperature: 21.2 °C

Event center: 49.0°N 87.0°E

Area affected: 50471 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-Jun-11_to_2025-Jun-14_87.0_49.0

Heat wave occuring from June 11 2025 to June 15 2025 at 59.5°N 143.0°E

Download data: JSON

Event type: Heat wave

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

  • Russian Federation

Duration: 5 days

Time span: June 11 2025 to June 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.9 °C
  • Mean temperature: 14.5 °C
  • Maximum temperature anomaly: 11.3 °C
  • Maximum temperature: 20.6 °C

Event center: 59.5°N 143.0°E

Area affected: 119507 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-Jun-11_to_2025-Jun-15_143.0_59.5

Heat wave occuring from June 10 2025 to June 12 2025 at 62.5°N 141.0°E

Download data: JSON

Event type: Heat wave

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

  • Russian Federation

Duration: 3 days

Time span: June 10 2025 to June 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 7.1 °C
  • Mean temperature: 15.2 °C
  • Maximum temperature anomaly: 11.0 °C
  • Maximum temperature: 19.7 °C

Event center: 62.5°N 141.0°E

Area affected: 120092 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-Jun-10_to_2025-Jun-12_141.0_62.5

Cold spell occuring from June 10 2025 to July 08 2025 at 78.5°N 136.5°E

Download data: JSON

Event type: Cold spell

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

  • Russian Federation

Duration: 29 days

Time span: June 10 2025 to July 08 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.0 °C
  • Mean temperature: -0.3 °C
  • Minimum temperature anomaly: -1.8 °C
  • Minimum temperature: -1.2 °C

Event center: 78.5°N 136.5°E

Area affected: 95565 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-Jun-10_to_2025-Jul-08_136.5_78.5

Heat wave occuring from June 08 2025 to June 11 2025 at 69.0°N 128.0°E

Download data: JSON

Event type: Heat wave

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

  • Russian Federation

Duration: 4 days

Time span: June 08 2025 to June 11 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 9.4 °C
  • Mean temperature: 18.8 °C
  • Maximum temperature anomaly: 12.9 °C
  • Maximum temperature: 22.5 °C

Event center: 69.0°N 128.0°E

Area affected: 443443 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-Jun-08_to_2025-Jun-11_128.0_69.0

Cold spell occuring from June 07 2025 to July 07 2025 at 82.5°N 50.0°E

Download data: JSON

Event type: Cold spell

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

  • Russian Federation
  • Svalbard and Jan Mayen

Duration: 31 days

Time span: June 07 2025 to July 07 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.0 °C
  • Mean temperature: -0.4 °C
  • Minimum temperature anomaly: -3.4 °C
  • Minimum temperature: -2.7 °C

Event center: 82.5°N 50.0°E

Area affected: 642392 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-Jun-07_to_2025-Jul-07_50.0_82.5

Heat wave occuring from June 07 2025 to June 15 2025 at 68.0°N 69.5°E

Download data: JSON

Event type: Heat wave

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

  • Kazakhstan
  • Russian Federation

Duration: 9 days

Time span: June 07 2025 to June 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 8.6 °C
  • Mean temperature: 23.0 °C
  • Maximum temperature anomaly: 13.9 °C
  • Maximum temperature: 29.0 °C

Event center: 68.0°N 69.5°E

Area affected: 2477661 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-Jun-07_to_2025-Jun-15_69.5_68.0

Heat wave occuring from June 05 2025 to June 07 2025 at 61.5°N 96.0°E

Download data: JSON

Event type: Heat wave

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

  • Russian Federation

Duration: 3 days

Time span: June 05 2025 to June 07 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 7.6 °C
  • Mean temperature: 19.4 °C
  • Maximum temperature anomaly: 9.8 °C
  • Maximum temperature: 22.1 °C

Event center: 61.5°N 96.0°E

Area affected: 60960 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-Jun-05_to_2025-Jun-07_96.0_61.5

Heat wave occuring from June 05 2025 to June 10 2025 at 45.0°N 137.0°E

Download data: JSON

Event type: Heat wave

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

  • Russian Federation

Duration: 6 days

Time span: June 05 2025 to June 10 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.7 °C
  • Mean temperature: 13.2 °C
  • Maximum temperature anomaly: 4.7 °C
  • Maximum temperature: 16.6 °C

Event center: 45.0°N 137.0°E

Area affected: 62044 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-Jun-05_to_2025-Jun-10_137.0_45.0

Heat wave occuring from June 04 2025 to June 06 2025 at 60.0°N 86.5°E

Download data: JSON

Event type: Heat wave

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

  • Russian Federation

Duration: 3 days

Time span: June 04 2025 to June 06 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 8.7 °C
  • Mean temperature: 21.4 °C
  • Maximum temperature anomaly: 11.2 °C
  • Maximum temperature: 24.2 °C

Event center: 60.0°N 86.5°E

Area affected: 77945 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-Jun-04_to_2025-Jun-06_86.5_60.0