Category: Extremes affecting Iran, Islamic Republic of

Heat wave occuring from September 27 2025 to November 04 2025 at 33.0°N 50.0°E

Download data: JSON

Event type: Heat wave

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

  • Afghanistan
  • Armenia
  • Azerbaijan
  • Georgia
  • Iran, Islamic Republic of
  • Iraq
  • Oman
  • Pakistan
  • Russian Federation
  • Saudi Arabia
  • Syrian Arab Republic
  • Türkiye
  • United Arab Emirates

Duration: 39 days

Time span: September 27 2025 to November 04 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.2 °C
  • Mean temperature: 22.8 °C
  • Maximum temperature anomaly: 8.5 °C
  • Maximum temperature: 32.7 °C

Event center: 33.0°N 50.0°E

Area affected: 2153300 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-Sep-27_to_2025-Nov-04_50.0_33.0

Cold spell occuring from September 19 2025 to September 27 2025 at 32.0°N 44.5°E

Download data: JSON

Event type: Cold spell

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

  • Armenia
  • Azerbaijan
  • Georgia
  • Iran, Islamic Republic of
  • Iraq
  • Kuwait
  • Russian Federation
  • Saudi Arabia
  • Turkmenistan
  • Türkiye

Duration: 9 days

Time span: September 19 2025 to September 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.1 °C
  • Mean temperature: 19.8 °C
  • Minimum temperature anomaly: -9.4 °C
  • Minimum temperature: 0.2 °C

Event center: 32.0°N 44.5°E

Area affected: 913134 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-Sep-19_to_2025-Sep-27_44.5_32.0

Cold spell occuring from September 12 2025 to September 19 2025 at 41.0°N 46.0°E

Download data: JSON

Event type: Cold spell

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

  • Armenia
  • Azerbaijan
  • Georgia
  • Iran, Islamic Republic of
  • Kazakhstan
  • Russian Federation

Duration: 8 days

Time span: September 12 2025 to September 19 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.3 °C
  • Mean temperature: 15.4 °C
  • Minimum temperature anomaly: -7.9 °C
  • Minimum temperature: 0.1 °C

Event center: 41.0°N 46.0°E

Area affected: 310852 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-Sep-12_to_2025-Sep-19_46.0_41.0

Heat wave occuring from August 07 2025 to August 26 2025 at 25.5°N 62.0°E

Download data: JSON

Event type: Heat wave

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

  • India
  • Iran, Islamic Republic of
  • Pakistan

Duration: 20 days

Time span: August 07 2025 to August 26 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.0 °C
  • Mean temperature: 31.4 °C
  • Maximum temperature anomaly: 4.1 °C
  • Maximum temperature: 35.5 °C

Event center: 25.5°N 62.0°E

Area affected: 240841 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-07_to_2025-Aug-26_62.0_25.5

Heat wave occuring from July 16 2025 to July 19 2025 at 42.0°N 57.5°E

Download data: JSON

Event type: Heat wave

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

  • Iran, Islamic Republic of
  • Kazakhstan
  • Turkmenistan
  • Uzbekistan

Duration: 4 days

Time span: July 16 2025 to July 19 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.3 °C
  • Mean temperature: 35.8 °C
  • Maximum temperature anomaly: 7.9 °C
  • Maximum temperature: 40.2 °C

Event center: 42.0°N 57.5°E

Area affected: 204719 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-16_to_2025-Jul-19_57.5_42.0

Heat wave occuring from July 12 2025 to July 18 2025 at 32.0°N 48.5°E

Download data: JSON

Event type: Heat wave

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

  • Iran, Islamic Republic of
  • Iraq
  • Kuwait

Duration: 7 days

Time span: July 12 2025 to July 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.6 °C
  • Mean temperature: 41.3 °C
  • Maximum temperature anomaly: 3.7 °C
  • Maximum temperature: 43.2 °C

Event center: 32.0°N 48.5°E

Area affected: 58214 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-12_to_2025-Jul-18_48.5_32.0

Cold spell occuring from June 29 2025 to July 09 2025 at 40.5°N 39.0°E

Download data: JSON

Event type: Cold spell

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

  • Armenia
  • Azerbaijan
  • Georgia
  • Iran, Islamic Republic of
  • Iraq
  • Russian Federation
  • Saudi Arabia
  • Syrian Arab Republic
  • Türkiye

Duration: 11 days

Time span: June 29 2025 to July 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.0 °C
  • Mean temperature: 21.1 °C
  • Minimum temperature anomaly: -7.2 °C
  • Minimum temperature: 7.1 °C

Event center: 40.5°N 39.0°E

Area affected: 760122 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-09_39.0_40.5

Cold spell occuring from June 04 2025 to June 12 2025 at 30.0°N 48.5°E

Download data: JSON

Event type: Cold spell

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

  • Iran, Islamic Republic of
  • Iraq

Duration: 9 days

Time span: June 04 2025 to June 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.9 °C
  • Mean temperature: 29.2 °C
  • Minimum temperature anomaly: -5.6 °C
  • Minimum temperature: 22.1 °C

Event center: 30.0°N 48.5°E

Area affected: 179006 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-04_to_2025-Jun-12_48.5_30.0

Cold spell occuring from June 04 2025 to June 11 2025 at 35.5°N 54.0°E

Download data: JSON

Event type: Cold spell

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

  • Iran, Islamic Republic of
  • Turkmenistan

Duration: 8 days

Time span: June 04 2025 to June 11 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.1 °C
  • Mean temperature: 21.5 °C
  • Minimum temperature anomaly: -10.2 °C
  • Minimum temperature: 6.6 °C

Event center: 35.5°N 54.0°E

Area affected: 411531 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-04_to_2025-Jun-11_54.0_35.5

Heat wave occuring from May 27 2025 to June 03 2025 at 31.0°N 51.5°E

Download data: JSON

Event type: Heat wave

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

  • Iran, Islamic Republic of

Duration: 8 days

Time span: May 27 2025 to June 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.6 °C
  • Mean temperature: 24.7 °C
  • Maximum temperature anomaly: 5.4 °C
  • Maximum temperature: 31.0 °C

Event center: 31.0°N 51.5°E

Area affected: 78692 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-27_to_2025-Jun-03_51.5_31.0