Average annual temperature is 19.5 °C
Absolute maximum temperature: 33.1 °C
Absolute minimum temperature: 3.2 °C
Number of sunny days: 122 days
Number of rainy days: 243 days
Look at detailed online map of Heo Sou San
* Weather data for Heo Sou San Vietnam is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 20.0 | 24.4 | 27.5 | 33.1 | 31.9 | 31.4 | 29.9 | 27.3 | 28.0 | 26.2 | 25.1 | 23.2 |
| Average daytime temperature (°C) | 16.2 | 20.6 | 23.4 | 28.6 | 27.3 | 26.0 | 26.2 | 24.7 | 25.9 | 23.7 | 20.9 | 18.5 |
| Average temperature (°C) | 11.8 | 16.4 | 18.7 | 23.7 | 23.5 | 22.3 | 22.6 | 21.6 | 21.9 | 19.8 | 16.8 | 14.6 |
| Average night temperature (°C) | 7.1 | 11.8 | 13.8 | 18.5 | 19.8 | 19.2 | 19.5 | 19.1 | 18.5 | 15.9 | 12.8 | 10.5 |
| Absolute minimum temperature (°C) | 3.2 | 7.4 | 9.7 | 14.9 | 16.9 | 17.3 | 18.1 | 17.3 | 16.9 | 13.0 | 9.1 | 4.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.9 | 11.4 | 12.0 | 12.7 | 13.2 | 13.5 | 13.4 | 12.9 | 12.3 | 11.6 | 11.1 | 10.8 |
| Daylight minimum duration (h) | 10.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 8.5 | 9.3 | 10.1 | 10.9 | 10.3 | 9.1 | 10.3 | 6.9 | 9.8 | 9.5 | 9.3 | 8.1 |
| Precipitation (mm) | 0 | 24 | 48 | 25 | 99 | 305 | 254 | 470 | 174 | 57 | 50 | 39 |
| Sunny days | 29 | 16 | 10 | 16 | 6 | 0 | 2 | 2 | 2 | 10 | 13 | 16 |
| Rainy days | 2 | 12 | 21 | 14 | 25 | 30 | 29 | 29 | 28 | 21 | 17 | 15 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Heo Sou San is at