Category: Extremes affecting Canada

Heat wave occuring from January 14 2026 to January 16 2026 at 43.0°N 302.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 3 days

Time span: January 14 2026 to January 16 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 7.1 °C
  • Mean temperature: 4.9 °C
  • Maximum temperature anomaly: 14.1 °C
  • Maximum temperature: 16.8 °C

Event center: 43.0°N 302.5°E

Area affected: 316316 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_2026-Jan-14_to_2026-Jan-16_302.5_43.0

Heat wave occuring from January 08 2026 to January 26 2026 at 62.0°N 216.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 19 days

Time span: January 08 2026 to January 26 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 9.5 °C
  • Mean temperature: 5.1 °C
  • Maximum temperature anomaly: 23.1 °C
  • Maximum temperature: 23.0 °C

Event center: 62.0°N 216.0°E

Area affected: 6054362 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_2026-Jan-08_to_2026-Jan-26_216.0_62.0

Heat wave occuring from January 07 2026 to January 09 2026 at 50.5°N 282.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 3 days

Time span: January 07 2026 to January 09 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 14.0 °C
  • Mean temperature: -2.7 °C
  • Maximum temperature anomaly: 17.2 °C
  • Maximum temperature: -0.3 °C

Event center: 50.5°N 282.5°E

Area affected: 57490 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_2026-Jan-07_to_2026-Jan-09_282.5_50.5

Cold spell occuring from March 13 2026 to March 15 2026 at 51.5°N 240.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 3 days

Time span: March 13 2026 to March 15 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -7.1 °C
  • Mean temperature: -10.3 °C
  • Minimum temperature anomaly: -9.2 °C
  • Minimum temperature: -17.7 °C

Event center: 51.5°N 240.5°E

Area affected: 79511 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_2026-Mar-13_to_2026-Mar-15_240.5_51.5

Cold spell occuring from March 13 2026 to March 20 2026 at 66.5°N 246.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 8 days

Time span: March 13 2026 to March 20 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -8.7 °C
  • Mean temperature: -33.2 °C
  • Minimum temperature anomaly: -11.3 °C
  • Minimum temperature: -40.0 °C

Event center: 66.5°N 246.5°E

Area affected: 211862 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_2026-Mar-13_to_2026-Mar-20_246.5_66.5

Cold spell occuring from March 01 2026 to March 05 2026 at 72.0°N 255.0°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 01 2026 to March 05 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -10.4 °C
  • Mean temperature: -41.7 °C
  • Minimum temperature anomaly: -20.6 °C
  • Minimum temperature: -52.5 °C

Event center: 72.0°N 255.0°E

Area affected: 200307 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_2026-Mar-01_to_2026-Mar-05_255.0_72.0

Cold spell occuring from February 26 2026 to March 01 2026 at 59.5°N 265.5°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: February 26 2026 to March 01 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -9.0 °C
  • Mean temperature: -30.3 °C
  • Minimum temperature anomaly: -12.7 °C
  • Minimum temperature: -35.1 °C

Event center: 59.5°N 265.5°E

Area affected: 61337 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_2026-Feb-26_to_2026-Mar-01_265.5_59.5

Heat wave occuring from February 25 2026 to March 04 2026 at 49.0°N 240.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 8 days

Time span: February 25 2026 to March 04 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 6.5 °C
  • Mean temperature: 4.3 °C
  • Maximum temperature anomaly: 9.1 °C
  • Maximum temperature: 7.0 °C

Event center: 49.0°N 240.5°E

Area affected: 64825 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_2026-Feb-25_to_2026-Mar-04_240.5_49.0

Heat wave occuring from February 18 2026 to February 22 2026 at 51.5°N 306.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada

Duration: 5 days

Time span: February 18 2026 to February 22 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 8.2 °C
  • Mean temperature: 0.5 °C
  • Maximum temperature anomaly: 11.6 °C
  • Maximum temperature: 3.2 °C

Event center: 51.5°N 306.5°E

Area affected: 119007 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_2026-Feb-18_to_2026-Feb-22_306.5_51.5

Cold spell occuring from February 17 2026 to February 24 2026 at 82.5°N 178.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 8 days

Time span: February 17 2026 to February 24 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -7.0 °C
  • Mean temperature: -32.9 °C
  • Minimum temperature anomaly: -9.0 °C
  • Minimum temperature: -35.1 °C

Event center: 82.5°N 178.0°E

Area affected: 697603 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_2026-Feb-17_to_2026-Feb-24_178.0_82.5