Category: Extremes affecting United States

Cold spell occuring from June 13 2025 to June 15 2025 at 46.0°N 270.5°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 3 days

Time span: June 13 2025 to June 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.1 °C
  • Mean temperature: 11.9 °C
  • Minimum temperature anomaly: -8.7 °C
  • Minimum temperature: 8.6 °C

Event center: 46.0°N 270.5°E

Area affected: 50078 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-13_to_2025-Jun-15_270.5_46.0

Heat wave occuring from June 10 2025 to June 24 2025 at 72.0°N 200.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 15 days

Time span: June 10 2025 to June 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.5 °C
  • Mean temperature: 9.8 °C
  • Maximum temperature anomaly: 10.2 °C
  • Maximum temperature: 24.6 °C

Event center: 72.0°N 200.0°E

Area affected: 1758757 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-24_200.0_72.0

Cold spell occuring from June 09 2025 to June 17 2025 at 48.0°N 274.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 9 days

Time span: June 09 2025 to June 17 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.9 °C
  • Mean temperature: 7.9 °C
  • Minimum temperature anomaly: -8.1 °C
  • Minimum temperature: 2.9 °C

Event center: 48.0°N 274.0°E

Area affected: 147414 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-09_to_2025-Jun-17_274.0_48.0

Cold spell occuring from June 05 2025 to June 18 2025 at 41.5°N 235.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 14 days

Time span: June 05 2025 to June 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.9 °C
  • Mean temperature: 11.2 °C
  • Minimum temperature anomaly: -3.9 °C
  • Minimum temperature: 8.4 °C

Event center: 41.5°N 235.0°E

Area affected: 209538 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-05_to_2025-Jun-18_235.0_41.5

Cold spell occuring from May 31 2025 to June 02 2025 at 39.0°N 280.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 3 days

Time span: May 31 2025 to June 02 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.9 °C
  • Mean temperature: 12.2 °C
  • Minimum temperature anomaly: -7.7 °C
  • Minimum temperature: 8.7 °C

Event center: 39.0°N 280.0°E

Area affected: 52347 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-31_to_2025-Jun-02_280.0_39.0

Cold spell occuring from May 27 2025 to June 12 2025 at 68.5°N 206.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Russian Federation
  • United States

Duration: 17 days

Time span: May 27 2025 to June 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.9 °C
  • Mean temperature: -0.2 °C
  • Minimum temperature anomaly: -11.9 °C
  • Minimum temperature: -10.1 °C

Event center: 68.5°N 206.0°E

Area affected: 2053255 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-27_to_2025-Jun-12_206.0_68.5

Cold spell occuring from May 26 2025 to May 30 2025 at 38.0°N 261.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 5 days

Time span: May 26 2025 to May 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.9 °C
  • Mean temperature: 14.8 °C
  • Minimum temperature anomaly: -7.2 °C
  • Minimum temperature: 12.0 °C

Event center: 38.0°N 261.0°E

Area affected: 145431 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-26_to_2025-May-30_261.0_38.0

Heat wave occuring from May 25 2025 to June 13 2025 at 48.0°N 306.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 20 days

Time span: May 25 2025 to June 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.6 °C
  • Mean temperature: 13.1 °C
  • Maximum temperature anomaly: 11.9 °C
  • Maximum temperature: 22.5 °C

Event center: 48.0°N 306.5°E

Area affected: 1440554 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-25_to_2025-Jun-13_306.5_48.0

Cold spell occuring from May 19 2025 to May 28 2025 at 44.0°N 286.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 10 days

Time span: May 19 2025 to May 28 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.8 °C
  • Mean temperature: 7.2 °C
  • Minimum temperature anomaly: -8.8 °C
  • Minimum temperature: 2.7 °C

Event center: 44.0°N 286.5°E

Area affected: 426842 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-19_to_2025-May-28_286.5_44.0

Heat wave occuring from May 18 2025 to June 09 2025 at 66.5°N 271.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 23 days

Time span: May 18 2025 to June 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.5 °C
  • Mean temperature: 7.2 °C
  • Maximum temperature anomaly: 18.9 °C
  • Maximum temperature: 34.8 °C

Event center: 66.5°N 271.5°E

Area affected: 6801025 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-18_to_2025-Jun-09_271.5_66.5