Category: Cold spells affecting United States

Cold spell occuring from July 21 2025 to July 23 2025 at 49.5°N 246.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 3 days

Time span: July 21 2025 to July 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.3 °C
  • Mean temperature: 14.1 °C
  • Minimum temperature anomaly: -7.7 °C
  • Minimum temperature: 7.7 °C

Event center: 49.5°N 246.5°E

Area affected: 58356 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-21_to_2025-Jul-23_246.5_49.5

Cold spell occuring from July 15 2025 to July 18 2025 at 48.0°N 254.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 4 days

Time span: July 15 2025 to July 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.7 °C
  • Mean temperature: 15.2 °C
  • Minimum temperature anomaly: -9.8 °C
  • Minimum temperature: 11.5 °C

Event center: 48.0°N 254.0°E

Area affected: 110321 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-15_to_2025-Jul-18_254.0_48.0

Cold spell occuring from July 15 2025 to July 23 2025 at 48.0°N 271.5°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: July 15 2025 to July 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.3 °C
  • Mean temperature: 14.5 °C
  • Minimum temperature anomaly: -9.6 °C
  • Minimum temperature: 5.9 °C

Event center: 48.0°N 271.5°E

Area affected: 273454 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-15_to_2025-Jul-23_271.5_48.0

Cold spell occuring from July 12 2025 to July 15 2025 at 31.5°N 260.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 4 days

Time span: July 12 2025 to July 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.7 °C
  • Mean temperature: 25.2 °C
  • Minimum temperature anomaly: -5.3 °C
  • Minimum temperature: 23.8 °C

Event center: 31.5°N 260.0°E

Area affected: 94982 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-12_to_2025-Jul-15_260.0_31.5

Cold spell occuring from July 05 2025 to July 12 2025 at 71.0°N 196.0°E

Download data: JSON

Event type: Cold spell

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

  • United States

Duration: 8 days

Time span: July 05 2025 to July 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.5 °C
  • Mean temperature: 1.8 °C
  • Minimum temperature anomaly: -11.4 °C
  • Minimum temperature: -2.3 °C

Event center: 71.0°N 196.0°E

Area affected: 216944 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-05_to_2025-Jul-12_196.0_71.0

Cold spell occuring from June 29 2025 to July 02 2025 at 26.0°N 262.0°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 4 days

Time span: June 29 2025 to July 02 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.2 °C
  • Mean temperature: 24.8 °C
  • Minimum temperature anomaly: -6.4 °C
  • Minimum temperature: 18.8 °C

Event center: 26.0°N 262.0°E

Area affected: 130330 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-29_to_2025-Jul-02_262.0_26.0

Cold spell occuring from June 22 2025 to August 03 2025 at 35.0°N 239.0°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 43 days

Time span: June 22 2025 to August 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.6 °C
  • Mean temperature: 15.4 °C
  • Minimum temperature anomaly: -6.4 °C
  • Minimum temperature: 9.4 °C

Event center: 35.0°N 239.0°E

Area affected: 732851 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-22_to_2025-Aug-03_239.0_35.0

Cold spell occuring from June 22 2025 to July 07 2025 at 29.0°N 254.0°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 16 days

Time span: June 22 2025 to July 07 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.6 °C
  • Mean temperature: 22.7 °C
  • Minimum temperature anomaly: -6.8 °C
  • Minimum temperature: 15.3 °C

Event center: 29.0°N 254.0°E

Area affected: 590517 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-22_to_2025-Jul-07_254.0_29.0

Cold spell occuring from June 21 2025 to June 28 2025 at 27.0°N 245.5°E

Download data: JSON

Event type: Cold spell

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

  • Mexico
  • United States

Duration: 8 days

Time span: June 21 2025 to June 28 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.7 °C
  • Mean temperature: 24.3 °C
  • Minimum temperature anomaly: -8.0 °C
  • Minimum temperature: 15.7 °C

Event center: 27.0°N 245.5°E

Area affected: 175755 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-21_to_2025-Jun-28_245.5_27.0

Cold spell occuring from June 21 2025 to June 24 2025 at 44.5°N 246.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 4 days

Time span: June 21 2025 to June 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.0 °C
  • Mean temperature: 9.0 °C
  • Minimum temperature anomaly: -12.0 °C
  • Minimum temperature: -0.8 °C

Event center: 44.5°N 246.5°E

Area affected: 777146 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-21_to_2025-Jun-24_246.5_44.5