Category: Extremes affecting Canada

Cold spell occuring from June 13 2026 to June 30 2026 at 47.5°N 275.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 18 days

Time span: June 13 2026 to June 30 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -6.0 °C
  • Mean temperature: 5.8 °C
  • Minimum temperature anomaly: -10.4 °C
  • Minimum temperature: 1.8 °C

Event center: 47.5°N 275.0°E

Area affected: 93928 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-Jun-13_to_2026-Jun-30_275.0_47.5

Cold spell occuring from June 13 2026 to June 16 2026 at 51.5°N 271.5°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: June 13 2026 to June 16 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -7.4 °C
  • Mean temperature: 7.6 °C
  • Minimum temperature anomaly: -9.3 °C
  • Minimum temperature: 4.0 °C

Event center: 51.5°N 271.5°E

Area affected: 157666 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-Jun-13_to_2026-Jun-16_271.5_51.5

Cold spell occuring from June 12 2026 to June 29 2026 at 49.0°N 298.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 18 days

Time span: June 12 2026 to June 29 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -3.8 °C
  • Mean temperature: 8.3 °C
  • Minimum temperature anomaly: -9.2 °C
  • Minimum temperature: 3.3 °C

Event center: 49.0°N 298.0°E

Area affected: 237773 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-Jun-12_to_2026-Jun-29_298.0_49.0

Heat wave occuring from June 08 2026 to June 12 2026 at 68.0°N 266.5°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: June 08 2026 to June 12 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 4.3 °C
  • Mean temperature: 4.6 °C
  • Maximum temperature anomaly: 10.7 °C
  • Maximum temperature: 12.3 °C

Event center: 68.0°N 266.5°E

Area affected: 194949 km$^2$



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Jun-08_to_2026-Jun-12_266.5_68.0

Heat wave occuring from June 05 2026 to June 09 2026 at 55.5°N 256.0°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: June 05 2026 to June 09 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 6.0 °C
  • Mean temperature: 18.6 °C
  • Maximum temperature anomaly: 8.7 °C
  • Maximum temperature: 21.7 °C

Event center: 55.5°N 256.0°E

Area affected: 85025 km$^2$



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Jun-05_to_2026-Jun-09_256.0_55.5

Heat wave occuring from June 02 2026 to June 06 2026 at 61.5°N 210.5°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 5 days

Time span: June 02 2026 to June 06 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 4.8 °C
  • Mean temperature: 11.7 °C
  • Maximum temperature anomaly: 8.3 °C
  • Maximum temperature: 18.9 °C

Event center: 61.5°N 210.5°E

Area affected: 179202 km$^2$



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Jun-02_to_2026-Jun-06_210.5_61.5

Cold spell occuring from May 31 2026 to June 03 2026 at 51.5°N 246.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 4 days

Time span: May 31 2026 to June 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -5.2 °C
  • Mean temperature: 8.1 °C
  • Minimum temperature anomaly: -8.8 °C
  • Minimum temperature: 2.7 °C

Event center: 51.5°N 246.5°E

Area affected: 125140 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-May-31_to_2026-Jun-03_246.5_51.5

Cold spell occuring from May 27 2026 to June 06 2026 at 41.0°N 299.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • United States

Duration: 11 days

Time span: May 27 2026 to June 06 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -4.0 °C
  • Mean temperature: 6.6 °C
  • Minimum temperature anomaly: -7.9 °C
  • Minimum temperature: 2.2 °C

Event center: 41.0°N 299.0°E

Area affected: 710141 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-May-27_to_2026-Jun-06_299.0_41.0

Heat wave occuring from May 25 2026 to May 28 2026 at 59.0°N 292.0°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: May 25 2026 to May 28 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 5.6 °C
  • Mean temperature: 6.3 °C
  • Maximum temperature anomaly: 11.1 °C
  • Maximum temperature: 14.0 °C

Event center: 59.0°N 292.0°E

Area affected: 90618 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-May-25_to_2026-May-28_292.0_59.0

Cold spell occuring from May 24 2026 to June 19 2026 at 80.5°N 197.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada
  • Russian Federation
  • United States

Duration: 27 days

Time span: May 24 2026 to June 19 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -2.6 °C
  • Mean temperature: -3.0 °C
  • Minimum temperature anomaly: -12.5 °C
  • Minimum temperature: -14.3 °C

Event center: 80.5°N 197.0°E

Area affected: 5946999 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-May-24_to_2026-Jun-19_197.0_80.5