Category: Weather Extremes – all events

Cold spell occuring from May 19 2026 to May 23 2026 at 35.0°N 46.0°E

Download data: JSON

Event type: Cold spell

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

  • Iran
  • Iraq

Duration: 5 days

Time span: May 19 2026 to May 23 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -4.3 °C
  • Mean temperature: 24.8 °C
  • Minimum temperature anomaly: -6.4 °C
  • Minimum temperature: 9.9 °C

Event center: 35.0°N 46.0°E

Area affected: 129428 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-May-19_to_2026-May-23_46.0_35.0

Heat wave occuring from May 19 2026 to May 29 2026 at -2.5°S 318.0°E

Download data: JSON

Event type: Heat wave

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

  • Brazil

Duration: 11 days

Time span: May 19 2026 to May 29 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.1 °C
  • Mean temperature: 28.1 °C
  • Maximum temperature anomaly: 1.9 °C
  • Maximum temperature: 29.3 °C

Event center: -2.5°S 318.0°E

Area affected: 95740 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_2026-May-19_to_2026-May-29_318.0_-2.5

Heat wave occuring from May 19 2026 to May 23 2026 at 37.0°N 86.0°E

Download data: JSON

Event type: Heat wave

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

  • China

Duration: 5 days

Time span: May 19 2026 to May 23 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 4.8 °C
  • Mean temperature: 4.0 °C
  • Maximum temperature anomaly: 7.4 °C
  • Maximum temperature: 28.5 °C

Event center: 37.0°N 86.0°E

Area affected: 212795 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_2026-May-19_to_2026-May-23_86.0_37.0

Cold spell occuring from May 18 2026 to May 20 2026 at 44.0°N 260.5°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: May 18 2026 to May 20 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -7.2 °C
  • Mean temperature: 8.4 °C
  • Minimum temperature anomaly: -8.9 °C
  • Minimum temperature: 5.7 °C

Event center: 44.0°N 260.5°E

Area affected: 157355 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-May-18_to_2026-May-20_260.5_44.0

Cold spell occuring from May 18 2026 to June 02 2026 at 77.0°N 213.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 16 days

Time span: May 18 2026 to June 02 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -3.8 °C
  • Mean temperature: -6.3 °C
  • Minimum temperature anomaly: -11.0 °C
  • Minimum temperature: -15.9 °C

Event center: 77.0°N 213.0°E

Area affected: 2463140 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-May-18_to_2026-Jun-02_213.0_77.0

Heat wave occuring from May 18 2026 to May 25 2026 at -37.5°S 169.0°E

Download data: JSON

Event type: Heat wave

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

  • New Zealand

Duration: 8 days

Time span: May 18 2026 to May 25 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 2.0 °C
  • Mean temperature: 16.7 °C
  • Maximum temperature anomaly: 4.4 °C
  • Maximum temperature: 18.3 °C

Event center: -37.5°S 169.0°E

Area affected: 196726 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_2026-May-18_to_2026-May-25_169.0_-37.5

Heat wave occuring from May 18 2026 to May 25 2026 at 15.5°N 39.0°E

Download data: JSON

Event type: Heat wave

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

  • Eritrea
  • Ethiopia

Duration: 8 days

Time span: May 18 2026 to May 25 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 2.2 °C
  • Mean temperature: 28.9 °C
  • Maximum temperature anomaly: 3.7 °C
  • Maximum temperature: 37.1 °C

Event center: 15.5°N 39.0°E

Area affected: 62545 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_2026-May-18_to_2026-May-25_39.0_15.5

Heat wave occuring from May 17 2026 to May 21 2026 at 3.5°N 290.0°E

Download data: JSON

Event type: Heat wave

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

  • Colombia

Duration: 5 days

Time span: May 17 2026 to May 21 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 26.0 °C
  • Maximum temperature anomaly: 2.0 °C
  • Maximum temperature: 27.8 °C

Event center: 3.5°N 290.0°E

Area affected: 104958 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_2026-May-17_to_2026-May-21_290.0_3.5

Heat wave occuring from May 17 2026 to May 26 2026 at 19.5°N 81.5°E

Download data: JSON

Event type: Heat wave

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

  • India

Duration: 10 days

Time span: May 17 2026 to May 26 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 2.0 °C
  • Mean temperature: 33.7 °C
  • Maximum temperature anomaly: 5.3 °C
  • Maximum temperature: 39.5 °C

Event center: 19.5°N 81.5°E

Area affected: 311007 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_2026-May-17_to_2026-May-26_81.5_19.5

Heat wave occuring from May 17 2026 to May 22 2026 at 29.0°N 82.5°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Nepal

Duration: 6 days

Time span: May 17 2026 to May 22 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 3.6 °C
  • Mean temperature: 7.3 °C
  • Maximum temperature anomaly: 5.3 °C
  • Maximum temperature: 22.3 °C

Event center: 29.0°N 82.5°E

Area affected: 56373 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_2026-May-17_to_2026-May-22_82.5_29.0