Category: Extremes affecting Viet Nam

Cold spell occuring from March 10 2026 to March 20 2026 at 23.0°N 101.0°E

Download data: JSON

Event type: Cold spell

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

  • China
  • Lao People’s Democratic Republic
  • Myanmar
  • Thailand
  • Viet Nam

Duration: 11 days

Time span: March 10 2026 to March 20 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -3.1 °C
  • Mean temperature: 17.9 °C
  • Minimum temperature anomaly: -5.7 °C
  • Minimum temperature: 9.9 °C

Event center: 23.0°N 101.0°E

Area affected: 462667 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-10_to_2026-Mar-20_101.0_23.0

Cold spell occuring from March 04 2026 to March 08 2026 at 13.5°N 105.5°E

Download data: JSON

Event type: Cold spell

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

  • Cambodia
  • Lao People’s Democratic Republic
  • Viet Nam

Duration: 5 days

Time span: March 04 2026 to March 08 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -2.5 °C
  • Mean temperature: 26.5 °C
  • Minimum temperature anomaly: -5.0 °C
  • Minimum temperature: 21.5 °C

Event center: 13.5°N 105.5°E

Area affected: 51166 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-04_to_2026-Mar-08_105.5_13.5

Heat wave occuring from February 21 2026 to March 04 2026 at 20.5°N 110.5°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Hong Kong
  • Lao People’s Democratic Republic
  • Taiwan, Province of China
  • Thailand
  • Viet Nam

Duration: 12 days

Time span: February 21 2026 to March 04 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 2.8 °C
  • Mean temperature: 24.6 °C
  • Maximum temperature anomaly: 8.2 °C
  • Maximum temperature: 29.5 °C

Event center: 20.5°N 110.5°E

Area affected: 1128611 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-21_to_2026-Mar-04_110.5_20.5

Heat wave occuring from February 15 2026 to February 20 2026 at 9.5°N 105.5°E

Download data: JSON

Event type: Heat wave

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

  • Cambodia
  • Viet Nam

Duration: 6 days

Time span: February 15 2026 to February 20 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.2 °C
  • Mean temperature: 28.1 °C
  • Maximum temperature anomaly: 2.2 °C
  • Maximum temperature: 30.3 °C

Event center: 9.5°N 105.5°E

Area affected: 112574 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-15_to_2026-Feb-20_105.5_9.5

Cold spell occuring from January 05 2026 to January 14 2026 at 17.5°N 100.5°E

Download data: JSON

Event type: Cold spell

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

  • Cambodia
  • China
  • Lao People’s Democratic Republic
  • Myanmar
  • Thailand
  • Viet Nam

Duration: 10 days

Time span: January 05 2026 to January 14 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -3.4 °C
  • Mean temperature: 19.6 °C
  • Minimum temperature anomaly: -7.0 °C
  • Minimum temperature: -0.5 °C

Event center: 17.5°N 100.5°E

Area affected: 1426926 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-Jan-05_to_2026-Jan-14_100.5_17.5

Heat wave occuring from December 18 2025 to December 27 2025 at 10.5°N 104.0°E

Download data: JSON

Event type: Heat wave

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

  • Cambodia
  • Viet Nam

Duration: 10 days

Time span: December 18 2025 to December 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.6 °C
  • Mean temperature: 27.8 °C
  • Maximum temperature anomaly: 2.5 °C
  • Maximum temperature: 28.8 °C

Event center: 10.5°N 104.0°E

Area affected: 106500 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-Dec-18_to_2025-Dec-27_104.0_10.5

Cold spell occuring from November 18 2025 to December 03 2025 at 19.0°N 100.5°E

Download data: JSON

Event type: Cold spell

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

  • Cambodia
  • China
  • Lao People’s Democratic Republic
  • Myanmar
  • Thailand
  • Viet Nam

Duration: 16 days

Time span: November 18 2025 to December 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.2 °C
  • Mean temperature: 19.6 °C
  • Minimum temperature anomaly: -7.6 °C
  • Minimum temperature: 5.9 °C

Event center: 19.0°N 100.5°E

Area affected: 2098929 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-18_to_2025-Dec-03_100.5_19.0

Cold spell occuring from November 17 2025 to November 26 2025 at 12.0°N 102.5°E

Download data: JSON

Event type: Cold spell

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

  • Cambodia
  • Lao People’s Democratic Republic
  • Myanmar
  • Thailand
  • Viet Nam

Duration: 10 days

Time span: November 17 2025 to November 26 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.7 °C
  • Mean temperature: 23.3 °C
  • Minimum temperature anomaly: -5.4 °C
  • Minimum temperature: 13.6 °C

Event center: 12.0°N 102.5°E

Area affected: 664618 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-26_102.5_12.0

Heat wave occuring from October 13 2025 to October 24 2025 at 10.5°N 108.0°E

Download data: JSON

Event type: Heat wave

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

  • Cambodia
  • Viet Nam

Duration: 12 days

Time span: October 13 2025 to October 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.2 °C
  • Mean temperature: 28.0 °C
  • Maximum temperature anomaly: 2.1 °C
  • Maximum temperature: 29.8 °C

Event center: 10.5°N 108.0°E

Area affected: 191311 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-13_to_2025-Oct-24_108.0_10.5

Cold spell occuring from September 30 2025 to November 04 2025 at 50.0°N 100.0°E

Download data: JSON

Event type: Cold spell

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

  • China
  • Hong Kong
  • Japan
  • Kazakhstan
  • Korea, Democratic People’s Republic of
  • Lao People’s Democratic Republic
  • Mongolia
  • Russian Federation
  • United States
  • Viet Nam

Duration: 36 days

Time span: September 30 2025 to November 04 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -5.8 °C
  • Mean temperature: -1.0 °C
  • Minimum temperature anomaly: -23.4 °C
  • Minimum temperature: -32.6 °C

Event center: 50.0°N 100.0°E

Area affected: 19274293 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-Sep-30_to_2025-Nov-04_100.0_50.0