Category: Extremes affecting Canada

Heat wave occuring from April 11 2025 to May 03 2025 at 60.0°N 296.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • Greenland

Duration: 23 days

Time span: April 11 2025 to May 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 7.6 °C
  • Mean temperature: -4.9 °C
  • Maximum temperature anomaly: 13.7 °C
  • Maximum temperature: 7.2 °C

Event center: 60.0°N 296.0°E

Area affected: 2526416 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-11_to_2025-May-03_296.0_60.0

Heat wave occuring from April 10 2025 to April 16 2025 at 76.5°N 283.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • Greenland

Duration: 7 days

Time span: April 10 2025 to April 16 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.3 °C
  • Mean temperature: -9.1 °C
  • Maximum temperature anomaly: 8.4 °C
  • Maximum temperature: -6.7 °C

Event center: 76.5°N 283.5°E

Area affected: 71531 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-10_to_2025-Apr-16_283.5_76.5

Cold spell occuring from April 03 2025 to April 06 2025 at 52.5°N 306.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 4 days

Time span: April 03 2025 to April 06 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.9 °C
  • Mean temperature: -10.5 °C
  • Minimum temperature anomaly: -9.1 °C
  • Minimum temperature: -14.2 °C

Event center: 52.5°N 306.0°E

Area affected: 71629 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-03_to_2025-Apr-06_306.0_52.5

Cold spell occuring from April 01 2025 to April 09 2025 at 74.0°N 281.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 9 days

Time span: April 01 2025 to April 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.5 °C
  • Mean temperature: -24.4 °C
  • Minimum temperature anomaly: -8.3 °C
  • Minimum temperature: -33.5 °C

Event center: 74.0°N 281.5°E

Area affected: 71282 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-01_to_2025-Apr-09_281.5_74.0

Cold spell occuring from March 26 2025 to March 30 2025 at 68.0°N 274.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 5 days

Time span: March 26 2025 to March 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.9 °C
  • Mean temperature: -29.7 °C
  • Minimum temperature anomaly: -11.6 °C
  • Minimum temperature: -36.7 °C

Event center: 68.0°N 274.0°E

Area affected: 102340 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-Mar-26_to_2025-Mar-30_274.0_68.0

Cold spell occuring from March 25 2025 to April 08 2025 at 65.0°N 278.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 15 days

Time span: March 25 2025 to April 08 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -8.9 °C
  • Mean temperature: -23.5 °C
  • Minimum temperature anomaly: -16.5 °C
  • Minimum temperature: -37.4 °C

Event center: 65.0°N 278.0°E

Area affected: 2315512 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-Mar-25_to_2025-Apr-08_278.0_65.0

Heat wave occuring from March 24 2025 to April 13 2025 at 56.5°N 227.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 21 days

Time span: March 24 2025 to April 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 7.4 °C
  • Mean temperature: -2.0 °C
  • Maximum temperature anomaly: 16.2 °C
  • Maximum temperature: 13.8 °C

Event center: 56.5°N 227.0°E

Area affected: 4563360 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-Mar-24_to_2025-Apr-13_227.0_56.5

Heat wave occuring from March 23 2025 to March 29 2025 at 44.5°N 237.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • Mexico
  • United States

Duration: 7 days

Time span: March 23 2025 to March 29 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.7 °C
  • Mean temperature: 13.1 °C
  • Maximum temperature anomaly: 14.6 °C
  • Maximum temperature: 29.5 °C

Event center: 44.5°N 237.0°E

Area affected: 3459146 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-Mar-23_to_2025-Mar-29_237.0_44.5

Heat wave occuring from March 21 2025 to March 24 2025 at 59.0°N 307.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 4 days

Time span: March 21 2025 to March 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 4.2 °C
  • Mean temperature: 2.8 °C
  • Maximum temperature anomaly: 7.2 °C
  • Maximum temperature: 5.0 °C

Event center: 59.0°N 307.5°E

Area affected: 177124 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-Mar-21_to_2025-Mar-24_307.5_59.0

Heat wave occuring from March 15 2025 to March 26 2025 at 48.5°N 302.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 12 days

Time span: March 15 2025 to March 26 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.5 °C
  • Mean temperature: 4.0 °C
  • Maximum temperature anomaly: 16.3 °C
  • Maximum temperature: 14.0 °C

Event center: 48.5°N 302.0°E

Area affected: 1149057 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-Mar-15_to_2025-Mar-26_302.0_48.5