Heat wave occuring from June 17 2025 to June 23 2025 at -16.0°S 29.5°E

Download data: JSON

Event type: Heat wave

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

  • Malawi
  • Mozambique
  • Zambia
  • Zimbabwe

Duration: 7 days

Time span: June 17 2025 to June 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.0 °C
  • Mean temperature: 22.1 °C
  • Maximum temperature anomaly: 4.6 °C
  • Maximum temperature: 26.5 °C

Event center: -16.0°S 29.5°E

Area affected: 749260 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-17_to_2025-Jun-23_29.5_-16.0

Cold spell occuring from May 23 2025 to June 05 2025 at -10.5°S 21.0°E

Download data: JSON

Event type: Cold spell

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

  • Angola
  • Congo, The Democratic Republic of the
  • Malawi
  • Mozambique
  • Tanzania, United Republic of
  • Zambia
  • Zimbabwe

Duration: 14 days

Time span: May 23 2025 to June 05 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.5 °C
  • Mean temperature: 18.8 °C
  • Minimum temperature anomaly: -4.3 °C
  • Minimum temperature: 11.2 °C

Event center: -10.5°S 21.0°E

Area affected: 1519055 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-23_to_2025-Jun-05_21.0_-10.5

Cold spell occuring from May 21 2025 to May 27 2025 at -24.5°S 27.0°E

Download data: JSON

Event type: Cold spell

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

  • Botswana
  • Namibia
  • South Africa
  • Zimbabwe

Duration: 7 days

Time span: May 21 2025 to May 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.9 °C
  • Mean temperature: 12.9 °C
  • Minimum temperature anomaly: -8.1 °C
  • Minimum temperature: 8.9 °C

Event center: -24.5°S 27.0°E

Area affected: 488517 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-21_to_2025-May-27_27.0_-24.5

Heat wave occuring from May 18 2025 to May 22 2025 at -17.5°S 28.5°E

Download data: JSON

Event type: Heat wave

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

  • Congo, The Democratic Republic of the
  • Mozambique
  • Zambia
  • Zimbabwe

Duration: 5 days

Time span: May 18 2025 to May 22 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.0 °C
  • Mean temperature: 22.2 °C
  • Maximum temperature anomaly: 6.0 °C
  • Maximum temperature: 28.0 °C

Event center: -17.5°S 28.5°E

Area affected: 355987 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-May-22_28.5_-17.5

Heat wave occuring from May 17 2025 to May 21 2025 at -22.0°S 35.0°E

Download data: JSON

Event type: Heat wave

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

  • Eswatini
  • Mozambique
  • South Africa
  • Zimbabwe

Duration: 5 days

Time span: May 17 2025 to May 21 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.5 °C
  • Mean temperature: 23.7 °C
  • Maximum temperature anomaly: 6.6 °C
  • Maximum temperature: 27.9 °C

Event center: -22.0°S 35.0°E

Area affected: 236131 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-17_to_2025-May-21_35.0_-22.0

Cold spell occuring from April 30 2025 to May 14 2025 at -19.5°S 17.0°E

Download data: JSON

Event type: Cold spell

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

  • Angola
  • Botswana
  • Congo, The Democratic Republic of the
  • Lesotho
  • Malawi
  • Mozambique
  • Namibia
  • South Africa
  • Tanzania, United Republic of
  • Zambia
  • Zimbabwe

Duration: 15 days

Time span: April 30 2025 to May 14 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.5 °C
  • Mean temperature: 16.5 °C
  • Minimum temperature anomaly: -8.7 °C
  • Minimum temperature: 3.1 °C

Event center: -19.5°S 17.0°E

Area affected: 4054624 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-Apr-30_to_2025-May-14_17.0_-19.5

Heat wave occuring from April 29 2025 to May 03 2025 at -16.0°S 29.5°E

Download data: JSON

Event type: Heat wave

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

  • Congo, The Democratic Republic of the
  • Mozambique
  • Zambia
  • Zimbabwe

Duration: 5 days

Time span: April 29 2025 to May 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.8 °C
  • Mean temperature: 24.1 °C
  • Maximum temperature anomaly: 5.6 °C
  • Maximum temperature: 30.2 °C

Event center: -16.0°S 29.5°E

Area affected: 340344 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-Apr-29_to_2025-May-03_29.5_-16.0

Cold spell occuring from April 17 2025 to April 21 2025 at -18.5°S 26.0°E

Download data: JSON

Event type: Cold spell

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

  • Botswana
  • Namibia
  • South Africa
  • Zambia
  • Zimbabwe

Duration: 5 days

Time span: April 17 2025 to April 21 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.1 °C
  • Mean temperature: 18.7 °C
  • Minimum temperature anomaly: -5.0 °C
  • Minimum temperature: 13.7 °C

Event center: -18.5°S 26.0°E

Area affected: 541543 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-Apr-17_to_2025-Apr-21_26.0_-18.5

Heat wave occuring from April 14 2025 to April 17 2025 at -16.5°S 25.0°E

Download data: JSON

Event type: Heat wave

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

  • Zambia
  • Zimbabwe

Duration: 4 days

Time span: April 14 2025 to April 17 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.2 °C
  • Mean temperature: 24.1 °C
  • Maximum temperature anomaly: 3.3 °C
  • Maximum temperature: 26.8 °C

Event center: -16.5°S 25.0°E

Area affected: 121431 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-Apr-14_to_2025-Apr-17_25.0_-16.5

Cold spell occuring from March 16 2025 to March 21 2025 at -22.5°S 27.0°E

Download data: JSON

Event type: Cold spell

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

  • Botswana
  • South Africa
  • Zimbabwe

Duration: 6 days

Time span: March 16 2025 to March 21 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.3 °C
  • Mean temperature: 19.9 °C
  • Minimum temperature anomaly: -4.8 °C
  • Minimum temperature: 16.4 °C

Event center: -22.5°S 27.0°E

Area affected: 149596 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-Mar-16_to_2025-Mar-21_27.0_-22.5