Category: Extremes affecting United States

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

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

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

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