Category: Extremes affecting Sweden

Cold spell occuring from November 17 2025 to November 21 2025 at 59.5°N 16.5°E

Download data: JSON

Event type: Cold spell

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

  • Norway
  • Sweden

Duration: 5 days

Time span: November 17 2025 to November 21 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.3 °C
  • Mean temperature: -4.4 °C
  • Minimum temperature anomaly: -10.0 °C
  • Minimum temperature: -9.8 °C

Event center: 59.5°N 16.5°E

Area affected: 64757 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-Nov-17_to_2025-Nov-21_16.5_59.5

Cold spell occuring from November 15 2025 to November 25 2025 at 68.0°N 25.5°E

Download data: JSON

Event type: Cold spell

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

  • Finland
  • Norway
  • Russian Federation
  • Sweden

Duration: 11 days

Time span: November 15 2025 to November 25 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -10.8 °C
  • Mean temperature: -16.4 °C
  • Minimum temperature anomaly: -20.8 °C
  • Minimum temperature: -28.0 °C

Event center: 68.0°N 25.5°E

Area affected: 424852 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-Nov-15_to_2025-Nov-25_25.5_68.0

Heat wave occuring from November 11 2025 to November 13 2025 at 57.0°N 18.0°E

Download data: JSON

Event type: Heat wave

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

  • Finland
  • Sweden

Duration: 3 days

Time span: November 11 2025 to November 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.7 °C
  • Mean temperature: 9.6 °C
  • Maximum temperature anomaly: 4.5 °C
  • Maximum temperature: 11.2 °C

Event center: 57.0°N 18.0°E

Area affected: 80534 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-Nov-11_to_2025-Nov-13_18.0_57.0

Heat wave occuring from October 21 2025 to October 27 2025 at 64.0°N 20.0°E

Download data: JSON

Event type: Heat wave

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

  • Norway
  • Sweden

Duration: 7 days

Time span: October 21 2025 to October 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.9 °C
  • Mean temperature: 6.8 °C
  • Maximum temperature anomaly: 8.8 °C
  • Maximum temperature: 10.4 °C

Event center: 64.0°N 20.0°E

Area affected: 315305 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-Oct-21_to_2025-Oct-27_20.0_64.0

Heat wave occuring from October 10 2025 to October 15 2025 at 61.0°N 9.0°E

Download data: JSON

Event type: Heat wave

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

  • Norway
  • Sweden

Duration: 6 days

Time span: October 10 2025 to October 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.7 °C
  • Mean temperature: 10.3 °C
  • Maximum temperature anomaly: 6.7 °C
  • Maximum temperature: 14.4 °C

Event center: 61.0°N 9.0°E

Area affected: 91298 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-Oct-10_to_2025-Oct-15_9.0_61.0

Cold spell occuring from August 19 2025 to August 28 2025 at 60.0°N 19.0°E

Download data: JSON

Event type: Cold spell

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

  • Belarus
  • Denmark
  • Estonia
  • Finland
  • Germany
  • Hungary
  • Latvia
  • Lithuania
  • Norway
  • Poland
  • Romania
  • Russian Federation
  • Slovakia
  • Sweden
  • Ukraine

Duration: 10 days

Time span: August 19 2025 to August 28 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.3 °C
  • Mean temperature: 11.1 °C
  • Minimum temperature anomaly: -8.3 °C
  • Minimum temperature: 1.3 °C

Event center: 60.0°N 19.0°E

Area affected: 3064720 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-19_to_2025-Aug-28_19.0_60.0

Heat wave occuring from June 13 2025 to June 17 2025 at 63.5°N 13.0°E

Download data: JSON

Event type: Heat wave

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

  • Norway
  • Sweden

Duration: 5 days

Time span: June 13 2025 to June 17 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.4 °C
  • Mean temperature: 14.0 °C
  • Maximum temperature anomaly: 9.6 °C
  • Maximum temperature: 19.6 °C

Event center: 63.5°N 13.0°E

Area affected: 338440 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-13_to_2025-Jun-17_13.0_63.5

Cold spell occuring from May 21 2025 to May 25 2025 at 63.0°N 14.0°E

Download data: JSON

Event type: Cold spell

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

  • Norway
  • Sweden

Duration: 5 days

Time span: May 21 2025 to May 25 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.4 °C
  • Mean temperature: 4.0 °C
  • Minimum temperature anomaly: -7.6 °C
  • Minimum temperature: 0.7 °C

Event center: 63.0°N 14.0°E

Area affected: 65454 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-25_14.0_63.0

Cold spell occuring from May 04 2025 to May 09 2025 at 62.5°N 23.5°E

Download data: JSON

Event type: Cold spell

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

  • Finland
  • Norway
  • Russian Federation
  • Sweden

Duration: 6 days

Time span: May 04 2025 to May 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.1 °C
  • Mean temperature: 1.1 °C
  • Minimum temperature anomaly: -6.5 °C
  • Minimum temperature: -3.3 °C

Event center: 62.5°N 23.5°E

Area affected: 264941 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-04_to_2025-May-09_23.5_62.5

Heat wave occuring from April 27 2025 to May 03 2025 at 58.5°N 17.0°E

Download data: JSON

Event type: Heat wave

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

  • Denmark
  • Norway
  • Sweden

Duration: 7 days

Time span: April 27 2025 to May 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.1 °C
  • Mean temperature: 10.9 °C
  • Maximum temperature anomaly: 5.9 °C
  • Maximum temperature: 16.1 °C

Event center: 58.5°N 17.0°E

Area affected: 138825 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-27_to_2025-May-03_17.0_58.5