Category: Extremes affecting Nigeria

Heat wave occuring from August 15 2025 to August 22 2025 at 5.5°N 6.5°E

Download data: JSON

Event type: Heat wave

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

  • Cameroon
  • Nigeria

Duration: 8 days

Time span: August 15 2025 to August 22 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.5 °C
  • Mean temperature: 25.6 °C
  • Maximum temperature anomaly: 2.8 °C
  • Maximum temperature: 27.7 °C

Event center: 5.5°N 6.5°E

Area affected: 147487 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-Aug-15_to_2025-Aug-22_6.5_5.5

Cold spell occuring from August 12 2025 to August 15 2025 at 13.5°N 5.0°E

Download data: JSON

Event type: Cold spell

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

  • Niger
  • Nigeria

Duration: 4 days

Time span: August 12 2025 to August 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.6 °C
  • Mean temperature: 25.3 °C
  • Minimum temperature anomaly: -4.6 °C
  • Minimum temperature: 23.1 °C

Event center: 13.5°N 5.0°E

Area affected: 140889 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-Aug-12_to_2025-Aug-15_5.0_13.5

Heat wave occuring from July 13 2025 to July 20 2025 at 6.5°N 7.5°E

Download data: JSON

Event type: Heat wave

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

  • Nigeria

Duration: 8 days

Time span: July 13 2025 to July 20 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.5 °C
  • Mean temperature: 26.6 °C
  • Maximum temperature anomaly: 2.9 °C
  • Maximum temperature: 29.2 °C

Event center: 6.5°N 7.5°E

Area affected: 239359 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-Jul-13_to_2025-Jul-20_7.5_6.5

Cold spell occuring from July 11 2025 to July 14 2025 at 15.5°N 11.0°E

Download data: JSON

Event type: Cold spell

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

  • Burkina Faso
  • Cameroon
  • Chad
  • Mali
  • Niger
  • Nigeria

Duration: 4 days

Time span: July 11 2025 to July 14 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.4 °C
  • Mean temperature: 27.9 °C
  • Minimum temperature anomaly: -6.3 °C
  • Minimum temperature: 24.1 °C

Event center: 15.5°N 11.0°E

Area affected: 636202 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-11_to_2025-Jul-14_11.0_15.5

Heat wave occuring from June 27 2025 to July 03 2025 at 9.0°N 6.0°E

Download data: JSON

Event type: Heat wave

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

  • Benin
  • Côte d’Ivoire
  • Ghana
  • Nigeria
  • Togo

Duration: 7 days

Time span: June 27 2025 to July 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.5 °C
  • Mean temperature: 27.2 °C
  • Maximum temperature anomaly: 3.6 °C
  • Maximum temperature: 30.9 °C

Event center: 9.0°N 6.0°E

Area affected: 576032 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-27_to_2025-Jul-03_6.0_9.0

Heat wave occuring from June 15 2025 to June 20 2025 at 5.5°N 0.0°E

Download data: JSON

Event type: Heat wave

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

  • Benin
  • Ghana
  • Nigeria
  • Togo

Duration: 6 days

Time span: June 15 2025 to June 20 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.2 °C
  • Mean temperature: 27.1 °C
  • Maximum temperature anomaly: 1.8 °C
  • Maximum temperature: 28.6 °C

Event center: 5.5°N 0.0°E

Area affected: 116497 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-15_to_2025-Jun-20_0.0_5.5

Heat wave occuring from May 25 2025 to May 29 2025 at 8.0°N 6.5°E

Download data: JSON

Event type: Heat wave

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

  • Benin
  • Nigeria

Duration: 5 days

Time span: May 25 2025 to May 29 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.4 °C
  • Mean temperature: 28.0 °C
  • Maximum temperature anomaly: 2.6 °C
  • Maximum temperature: 31.9 °C

Event center: 8.0°N 6.5°E

Area affected: 353488 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-25_to_2025-May-29_6.5_8.0

Heat wave occuring from April 23 2025 to April 30 2025 at 5.5°N 4.0°E

Download data: JSON

Event type: Heat wave

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

  • Nigeria

Duration: 8 days

Time span: April 23 2025 to April 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 0.9 °C
  • Mean temperature: 28.3 °C
  • Maximum temperature anomaly: 2.0 °C
  • Maximum temperature: 29.0 °C

Event center: 5.5°N 4.0°E

Area affected: 228359 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-23_to_2025-Apr-30_4.0_5.5

Heat wave occuring from April 18 2025 to April 22 2025 at 6.5°N 3.5°E

Download data: JSON

Event type: Heat wave

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

  • Benin
  • Ghana
  • Nigeria
  • Togo

Duration: 5 days

Time span: April 18 2025 to April 22 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.5 °C
  • Mean temperature: 29.4 °C
  • Maximum temperature anomaly: 2.0 °C
  • Maximum temperature: 31.4 °C

Event center: 6.5°N 3.5°E

Area affected: 88928 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-18_to_2025-Apr-22_3.5_6.5

Heat wave occuring from April 04 2025 to April 09 2025 at 6.0°N 10.0°E

Download data: JSON

Event type: Heat wave

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

  • Benin
  • Cameroon
  • Central African Republic
  • Congo
  • Ghana
  • Nigeria
  • Togo

Duration: 6 days

Time span: April 04 2025 to April 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.0 °C
  • Mean temperature: 29.2 °C
  • Maximum temperature anomaly: 3.4 °C
  • Maximum temperature: 35.7 °C

Event center: 6.0°N 10.0°E

Area affected: 647801 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-04_to_2025-Apr-09_10.0_6.0