Category: Extremes affecting United States

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: August 13 2026 to August 16 2026

Statistics over entire affected area:

• Mean temperature anomaly: -5.1 °C
• Mean temperature: 20.2 °C
• Minimum temperature anomaly: -8.4 °C
• Minimum temperature: 10.4 °C

Event center: 37.0°N 246.5°E

Area affected: 317189 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_2026-Aug-13_to_2026-Aug-16_246.5_37.0

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: August 02 2026 to August 04 2026

Statistics over entire affected area:

• Mean temperature anomaly: -5.3 °C
• Mean temperature: 17.0 °C
• Minimum temperature anomaly: -7.2 °C
• Minimum temperature: 11.6 °C

Event center: 46.0°N 241.5°E

Area affected: 53790 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_2026-Aug-02_to_2026-Aug-04_241.5_46.0

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 22 2026 to July 25 2026

Statistics over entire affected area:

• Mean temperature anomaly: -4.4 °C
• Mean temperature: 20.4 °C
• Minimum temperature anomaly: -6.4 °C
• Minimum temperature: 17.4 °C

Event center: 41.0°N 273.5°E

Area affected: 88835 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_2026-Jul-22_to_2026-Jul-25_273.5_41.0

Download data: JSON

Event type: Cold spell

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

• United States

Duration: 15 days

Time span: July 11 2026 to July 25 2026

Statistics over entire affected area:

• Mean temperature anomaly: -3.4 °C
• Mean temperature: 8.4 °C
• Minimum temperature anomaly: -7.3 °C
• Minimum temperature: -0.5 °C

Event center: 53.0°N 190.0°E

Area affected: 878637 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_2026-Jul-11_to_2026-Jul-25_190.0_53.0

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: June 21 2026 to June 24 2026

Statistics over entire affected area:

• Mean temperature anomaly: -4.5 °C
• Mean temperature: 18.4 °C
• Minimum temperature anomaly: -7.5 °C
• Minimum temperature: 13.9 °C

Event center: 41.5°N 273.0°E

Area affected: 96095 km$^2$

Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2026-Jun-21_to_2026-Jun-24_273.0_41.5