Category: Heat waves affecting Iceland

Download data: JSON

Event type: Heat wave

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

• Iceland

Duration: 5 days

Time span: September 27 2025 to October 01 2025

Statistics over entire affected area:

• Mean temperature anomaly: 2.3 °C
• Mean temperature: 9.6 °C
• Maximum temperature anomaly: 3.6 °C
• Maximum temperature: 11.1 °C

Event center: 65.0°N 330.0°E

Area affected: 226468 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-Oct-01_330.0_65.0

Download data: JSON

Event type: Heat wave

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

• Iceland

Duration: 9 days

Time span: August 10 2025 to August 18 2025

Statistics over entire affected area:

• Mean temperature anomaly: 1.6 °C
• Mean temperature: 12.0 °C
• Maximum temperature anomaly: 6.0 °C
• Maximum temperature: 13.4 °C

Event center: 62.5°N 351.5°E

Area affected: 128254 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-10_to_2025-Aug-18_351.5_62.5

Download data: JSON

Event type: Heat wave

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

• Iceland

Duration: 9 days

Time span: July 09 2024 to July 17 2024

Statistics over entire affected area:

• Mean temperature anomaly: 2.8 °C
• Mean temperature: 10.9 °C
• Maximum temperature anomaly: 8.1 °C
• Maximum temperature: 17.5 °C

Event center: 66.0°N 340.5°E

Area affected: 300860 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_2024-Jul-09_to_2024-Jul-17_340.5_66.0

Download data: JSON

Event type: Heat wave

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

• Iceland

Duration: 8 days

Time span: October 17 2023 to October 24 2023

Statistics over entire affected area:

• Mean temperature anomaly: 3.7 °C
• Mean temperature: 5.8 °C
• Maximum temperature anomaly: 7.9 °C
• Maximum temperature: 11.9 °C

Event center: 67.5°N 338.0°E

Area affected: 486187 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_2023-Oct-17_to_2023-Oct-24_338.0_67.5

Download data: JSON

Event type: Heat wave

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

• Iceland

Duration: 4 days

Time span: July 08 2023 to July 11 2023

Statistics over entire affected area:

• Mean temperature anomaly: 3.6 °C
• Mean temperature: 12.4 °C
• Maximum temperature anomaly: 6.8 °C
• Maximum temperature: 17.5 °C

Event center: 64.0°N 339.5°E

Area affected: 51994 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_2023-Jul-08_to_2023-Jul-11_339.5_64.0

Download data: JSON

Event type: Heat wave

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

• Iceland

Duration: 6 days

Time span: May 16 2023 to May 21 2023

Statistics over entire affected area:

• Mean temperature anomaly: 2.1 °C
• Mean temperature: 6.5 °C
• Maximum temperature anomaly: 3.9 °C
• Maximum temperature: 8.4 °C

Event center: 66.0°N 332.5°E

Area affected: 129981 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_2023-May-16_to_2023-May-21_332.5_66.0