Category: Extremes affecting Norway

Heat wave occuring from May 15 2025 to May 20 2025 at 57.0°N 6.0°E

Download data: JSON

Event type: Heat wave

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

  • Norway

Duration: 6 days

Time span: May 15 2025 to May 20 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.5 °C
  • Mean temperature: 12.0 °C
  • Maximum temperature anomaly: 5.0 °C
  • Maximum temperature: 16.7 °C

Event center: 57.0°N 6.0°E

Area affected: 98424 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-15_to_2025-May-20_6.0_57.0

Heat wave occuring from May 08 2025 to May 20 2025 at 59.5°N 7.0°E

Download data: JSON

Event type: Heat wave

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

  • Norway

Duration: 13 days

Time span: May 08 2025 to May 20 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.8 °C
  • Mean temperature: 10.2 °C
  • Maximum temperature anomaly: 9.1 °C
  • Maximum temperature: 15.5 °C

Event center: 59.5°N 7.0°E

Area affected: 75627 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-08_to_2025-May-20_7.0_59.5

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

Cold spell occuring from April 20 2025 to April 29 2025 at 75.0°N 21.0°E

Download data: JSON

Event type: Cold spell

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

  • Norway
  • Russian Federation
  • Svalbard and Jan Mayen

Duration: 10 days

Time span: April 20 2025 to April 29 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.0 °C
  • Mean temperature: -6.5 °C
  • Minimum temperature anomaly: -8.6 °C
  • Minimum temperature: -16.4 °C

Event center: 75.0°N 21.0°E

Area affected: 348423 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-20_to_2025-Apr-29_21.0_75.0

Cold spell occuring from April 18 2025 to April 27 2025 at 74.0°N 350.5°E

Download data: JSON

Event type: Cold spell

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

  • Finland
  • Greenland
  • Norway
  • Sweden

Duration: 10 days

Time span: April 18 2025 to April 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.0 °C
  • Mean temperature: -2.9 °C
  • Minimum temperature anomaly: -9.2 °C
  • Minimum temperature: -18.7 °C

Event center: 69.5°N 18.0°E

Area affected: 939861 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-18_to_2025-Apr-27_350.5_74.0

Cold spell occuring from April 06 2025 to April 17 2025 at 74.5°N 351.0°E

Download data: JSON

Event type: Cold spell

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

  • Greenland
  • Norway
  • Svalbard and Jan Mayen

Duration: 12 days

Time span: April 06 2025 to April 17 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.7 °C
  • Mean temperature: -8.6 °C
  • Minimum temperature anomaly: -11.5 °C
  • Minimum temperature: -27.2 °C

Event center: 75.5°N 0.0°E

Area affected: 1031928 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-06_to_2025-Apr-17_351.0_74.5

Cold spell occuring from February 12 2025 to February 19 2025 at 61.5°N 6.5°E

Download data: JSON

Event type: Cold spell

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

  • Norway

Duration: 8 days

Time span: February 12 2025 to February 19 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -8.4 °C
  • Mean temperature: -11.7 °C
  • Minimum temperature anomaly: -14.2 °C
  • Minimum temperature: -21.3 °C

Event center: 61.5°N 6.5°E

Area affected: 63167 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-Feb-12_to_2025-Feb-19_6.5_61.5

Cold spell occuring from January 01 2025 to January 06 2025 at 67.5°N 25.0°E

Download data: JSON

Event type: Cold spell

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

  • Finland
  • Norway
  • Sweden

Duration: 6 days

Time span: January 01 2025 to January 06 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -13.1 °C
  • Mean temperature: -22.6 °C
  • Minimum temperature anomaly: -19.8 °C
  • Minimum temperature: -30.2 °C

Event center: 67.5°N 25.0°E

Area affected: 83710 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-Jan-01_to_2025-Jan-06_25.0_67.5

Cold spell occuring from December 29 2024 to January 12 2025 at 66.0°N 342.0°E

Download data: JSON

Event type: Cold spell

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

  • Iceland
  • Norway
  • United Kingdom

Duration: 15 days

Time span: December 29 2024 to January 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.5 °C
  • Mean temperature: -0.6 °C
  • Minimum temperature anomaly: -19.6 °C
  • Minimum temperature: -24.0 °C

Event center: 66.0°N 342.0°E

Area affected: 2084515 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_2024-Dec-29_to_2025-Jan-12_342.0_66.0